HP 8935 CDMA Cellular/PCS Base Station Test Set Reference Guide Firmware Version: A.01.00 and above HP Part Number E6380-90019 Revision A Printed in U.S.A.
Notice Information contained in this document is subject to change without notice. All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. This material may be reproduced by or for the U.S. Government pursuant to the Copyright License under the clause at DFARS 52.227-7013 (APR 1988).
Contents Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 In This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Conventions Used in this Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1. Getting Started Before Connecting a Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Changing the Test Set’s Display . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Transfer Stored Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SA (spectrum analyzer) Self Calibration ON/OFF . . . . . . . . . . . . . . Catalog PC (Memory) Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Set Up Printer/Data Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Code Domain Analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selecting the Code Domain Analyzer’s Controls Menus . . . . . . .
Contents Freq Err. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gen Dir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gen Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gen Special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents AFGen1 To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AFGen2 Freq. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AFGen2 To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Atten Hold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Sensitivity (spectrum analyzer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . Settling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Speaker ALC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Speaker Vol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Squelch .
Contents Parity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Printer Port: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Print Title:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Range Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ref Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Accessories . . . . . . . . . . . . . . . . . . . . . . . External Monitor . . . . . . . . . . . . . . . . Manuals (English and non-English) . Test Software . . . . . . . . . . . . . . . . . . . Options . . . . . . . . . . . . . . . . . . . . . . . . HP Support for Your Instrument . . . . . Getting Help . . . . . . . . . . . . . . . . . . . . Customer Training . . . . . . . . . . . . . . . 9. ....... ....... ....... ....... ....... ....... ....... ....... ................ ................ ......
Contents 10 Main Menu
Product Information 11 Main Menu
Manufacturer’s Declaration This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January 1991. This product has a sound pressure emission (at the operator position) < 70 dB(A). • Sound Pressure Lp < 70 dB(A). • At Operator Position. • Normal Operation. • According to ISO 7779:1988/EN 27779:1991 (Type Test). Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenlärminformationsverordnung vom 18 Januar 1991.
GENERAL Safety Considerations This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation. This product has been designed and tested in accordance with IEC Publication 1010, "Safety Requirements for Electronic Measuring Apparatus," and has been supplied in a safe condition.
Safety Considerations for this Instrument WARNING ! ! ! This product is a Safety Class I instrument (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous. Intentional interruption is prohibited.
Servicing instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so. The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the product from all voltage sources while it is being opened. Adjustments described in the manual are performed with power supplied to the instrument while protective covers are removed.
CERTIFICATION Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standards Organization members.
Table 1 Regional Sales and Service Offices Eastern USA Sales Office Hewlett-Packard Company 2101 Gather Rd. Rockville, MD 20850 Tel: (301) 258-2000 Eastern USA Sales Office Hewlett-Packard Company 2101 Gather Rd.
Asia Sales and Service Hewlett-Packard Asia Ltd. 22-30/F Peregrine Tower Lippo Center 89 Queensway, Central Hong Kong G.P.O. Box 863 Hong Kong Telephone: 852-848-7777 Fax: 852-868-4997 Japan Sales and Service Yokogawa-Hewlett-Packard Ltd. 3-29-21, Takaido-Higashi Suginami-Ku, Tokyo 168 Telephone: 81 3 3331-6111 Fax: 81 3 3331-6631 International Sales Branch Headquarters Sales and Service Hewlett-Packard S.A. 39 Rue Veyrot P.O.
Product Description The HP 8935 CDMA Cellular/PCS Base Station Test Set offers full signal generation and analysis capability and support for cellular frequency bands and international PCS frequency bands.
In This Book • Chapter 1, “Getting Started,” on page 23 familiarizes you with the front panel controls. It introduces the different types of control fields that are used to make measurements • Chapter 2, “Operating Overview,” on page 33 provides general information about how to change measurement screens and change control field settings.
Conventions Used in this Book Screen names are shown as follows: CODE DOM. Keys are shown in the following typeface: CDMA Gen. Shifted functions (labeled in blue above the keys) are accessed by pressing and releasing the blue Shift key, and then the key below the blue label. Fields and messages displayed on the CRT are shown in the following typeface: Input Atten. The term “Test Set” is used to refer to the HP 8935.
Main Menu
1 Getting Started • • • • “Before Connecting a Radio” on page 24 “Changing the Measurement Screen” on page 25 “Changing the Control Fields” on page 26 “Instrument Quick Check” on page 31 23 Main Menu
Getting Started Before Connecting a Radio Before Connecting a Radio NOTE The RF IN/OUT port should be used for all transmitter tests when the radio is connected directly to the Test Set. (All UUT transmitter power measurements are made through this port). Off-the-air measurements can be made using the ANT IN port. CAUTION Overpower Damage — Refer to the Test Set’s side panel for maximum input power level at the RF IN/OUT, DUPLEX OUT, and ANT IN connectors.
Getting Started Changing the Test Set’s Display Changing the Test Set’s Display Changing the Measurement Screen The measurement screen is changed using the titlebar at the top of the screen and the cursor-control knob, using the GENERATOR/ANALYZER keys, or by using the UTILS keys. Rotate the knob to move the cursor from field to field or to change settings. Press the knob to make selections (see “Changing the Control Fields” on page 26 for more information about fields).
Getting Started Changing the Test Set’s Display Changing the Control Fields There are several types of control fields in the Test Set. This section describes some of the different types of fields. Unit-of-Measure Field Unit-of-measure can be changed to display measurements in different values or magnitudes. The unit-of-measure field can also be used to turn a measurement on or off (use the On/Off Yes key). Figure 1-2 Unit-of-Measure Field Unit-of-Measure To change a unit-of-measure field Step 1.
Getting Started Changing the Test Set’s Display Underlined Entry Field Underlined entry fields provide a choice of two settings (toggle). Figure 1-3 Underlined Entry Field Underlined Entry Field To Change an underlined entry Step 1. Position the cursor at the field. Step 2. Push the cursor-control knob or the underline under the desired choice. Enter key to move the The underlined setting is immediately activated when selected.
Getting Started Changing the Test Set’s Display One-of-Many Field One-of-many fields display a list of choices when selected. Figure 1-4 One-of-Many Field One-of-Many Field Choices: Chan Pwr Rho EVM Avg Pwr To make a one-of-many choice Step 1. Position the cursor at the field. Step 2. Push the cursor-control knob or the Enter key to display the choices. Step 3. Move the cursor through the choices by turning the knob. Step 4. Push the cursor-control knob or the Enter key to make the choice.
Getting Started Changing the Test Set’s Display Numeric-Entry Fields Values for numeric entry fields can be entered and changed using various methods, depending on your testing needs. Figure 1-5 Numeric-Entry Field Numeric Entry Field To change a value Step 1. Position the cursor at the field. Step 2. Key in the desired number using the DATA ENTRY keys. Step 3. Press Enter to select the choice. OR Step 1. Position the cursor at the field. Step 2.
Getting Started Changing the Test Set’s Display Decimal Values Decimal values are used for most numeric entry fields. The acceptable entries for decimal values are 0 through 9, , +/-, and EEX. The +/- key is used for entering negative numbers. The EEX key is used to enter values in exponential notation. For example to enter 10-9 you would enter 1, 0, EEX (Shift, +/-), +/-, 9. Hexadecimal Values Hexadecimal (Hex) values are used for entering some signaling parameters.
Getting Started How do I Verify that the Test Set is Operating Properly? How do I Verify that the Test Set is Operating Properly? If your Test Set powers-up and displays the CDMA ANALYZER screen, but you suspect an instrument problem, use the Instrument Quick Check to verify operation of the basic instrument functions. If no failure is indicated by this test, but you still suspect a problem, refer to the “Performance Tests” information in the Assembly Level Repair Manual. Instrument Quick Check Step 1.
Getting Started How do I Verify that the Test Set is Operating Properly? Figure 1-6 CDMA Spectrum 32 Chapter 1 Main Menu
2 Operating Overview • "Displaying CDMA Measurements" on page 34 • "Displaying Analog Measurements" on page 36 • "Using Channel Numbers to Set Analyzer and Generator Frequencies" on page 40 • "Calibrating the Channel Power Measurement" on page 41 • "Changing the Increment or Decrement Setting" on page 42 • "Using Measurement Limit Indicators" on page 43 • "Setting A Measurement Reference" on page 45 • "Averaging Measurements" on page 46 • "Setting an RF Generator/Analyzer Offset" on page 47 • "Saving and R
Operating Overview Displaying CDMA Measurements Displaying CDMA Measurements Channel Power, Rho, EVM, Average Power You can select channel power, rho, EVM, or average power on the CDMA ANALYZER or CDMA GENERATOR screen as shown in Figure 2-1. For more information about these measurements see "CDMA Measurements" on page 82.
Operating Overview Displaying CDMA Measurements Code Domain Measurements (Power, Timing, Phase) Code domain measurements are displayed on the CODE DOM screen. To select a code domain measurement, go to the CODE DOM screen and select a measurement from the Measurement field in the Main controls menu. For more information about code domain measurements see "Code Domain Measurements" on page 89.
Operating Overview Displaying Analog Measurements Displaying Analog Measurements RF Measurements Frequency Error, Frequency RF Frequency Error and RF Frequency are displayed on the RF ANALYZER, RF GENERATOR, and AF ANALYZER screens. Figure 2-3 Displaying RF Frequency Error or RF Frequency, and TX Power Choices: Freq Error Frequency TX Power Transmitter (TX)Power TX Power is only measured and displayed here when the Input Port on the RF ANALYZER screen is set to RF In.
Operating Overview Displaying Analog Measurements Displaying AF Measurements FM Deviation, AM Depth, AC Level The AF Anl In setting determines the AF analyzer’s input and the measurement displayed in the top-right corner of the measurement area (see figure 2-4). These measurements are displayed on the RF GENERATOR, RF ANALYZER, and AF ANALYZER screens. Table 2-1 lists the measurement displayed for each AF Anl In setting.
Operating Overview Displaying Analog Measurements SINAD, Distortion, SNR, AF Frequency, DC Level, These measurements are available on the RF GENERATOR, RF ANALYZER, and AF ANALYZER screens. See figure 2-5. Figure 2-5 Displaying SINAD, Distortion, SNR, DC Level, or AF Frequency Choices: SINAD Distn SNR AF Freq DC Level The Distortion measurement is only for a 1 kHz tone. Selecting SNR (Signal/Noise Ratio) turns off any other audio measurement.
Operating Overview Displaying Analog Measurements Displaying Analog Measurement Results on a Meter Scale Figure 2-6 Displaying the Meter Scale Unit-of -Measure Fields Meters: On/Off Lo End Hi End Intervals Measurement results can be displayed on a meter scale. The digital numeric value is still displayed (but smaller) under the meter scale. To display the meter scale Step 1. Move the cursor to the unit-of-measure field for the measurement you want displayed on the meter. Step 2.
Operating Overview Using Channel Numbers to Set Analyzer and Generator Frequencies Using Channel Numbers to Set Analyzer and Generator Frequencies RF analyzer and RF generator frequencies can be entered by channel number (the default setting) or by discrete frequencies (in MHz). The RF Display field on the INSTRUMENT CONFIGURE screen controls which way frequencies are entered. This screen is accessed by pressing the Inst Config key.
Operating Overview Calibrating the Channel Power Measurement Calibrating the Channel Power Measurement To calibrate a channel power measurement at the RF IN/OUT port using the internal CDMA generator Step 1. Go to the CDMA ANALYZER screen and choose the Chan Pwr measurement. Step 2. Set the Tune Freq field (or RF Channel field) to the center frequency of your CDMA signal. Step 3. Select the Chn Pwr Cal field and wait until the calibration is complete.
Operating Overview Changing the Increment or Decrement Setting Changing the Increment or Decrement Setting Specifying An Increment Value for the Arrow Keys or Knob The Incr Set key is used to assign a specific increment value. The increment value may use different units than the field you are incrementing/decrementing. For instance; if the RF generator’s Amplitude setting is displayed in dBµV, you could increment in units of dB or mV. To change the increment/decrement value Step 1.
Operating Overview Using Measurement Limit Indicators Using Measurement Limit Indicators The Lo Limit and Hi Limit functions are used to define a measurement “window.” You can set a high limit, a low limit, or both. When limits are assigned, Lo, Hi or both are indicated on the screen. A measurement that goes above or below the defined limits causes three things to happen: 1. A message appears at the top of the screen indicating a limit was exceeded. 2. The Lo or Hi indicator flashes. 3.
Operating Overview Using Measurement Limit Indicators To reset or remove limits To reset a limit that has been exceeded Step 1. Position the cursor in front of the measurement’s unit-of-measure. Step 2. Press and release the Shift key, then the down-arrow (or up-arrow key) to access the Lo Limit (or Hi Limit) function. Step 3. Press Enter or Shift then Hold to access the Meas Reset function. To remove a limit Step 1. Position the cursor in front of the unit-of-measure for the assigned limit. Step 2.
Operating Overview Setting A Measurement Reference Setting A Measurement Reference The reference set (Ref Set) function establishes a measurement reference point. This allows you to make a direct comparison between two measurement results, or between a measurement standard and the actual measurement results. Depending on the type of measurement, referenced measurements are displayed in one of two ways: 1. Displayed value = Measurement − Reference.
Operating Overview Averaging Measurements Averaging Measurements The Avg (average) function allows you to display the average value of a number of measurements. You enter the number of measurement samples used to calculate and display the measurement average. This dampens the effects of rapidly changing measurements, providing a more usable measurement display. To use measurement averaging Step 1. Position the cursor in front of the measurement’s unit-of-measure. Step 2.
Operating Overview Setting an RF Generator/Analyzer Offset Setting an RF Generator/Analyzer Offset You can set a fixed frequency offset between the RF generator and the RF analyzer. This feature is convenient for testing radios with a fixed transmit/receive frequency offset. To set an RF Offset Step 1. Go to the INSTRUMENT CONFIGURE screen. Step 2. Set the RF Display field to Freq. Step 3. Set the RF Offset field to On. Step 4. Select the (Gen)-(Anl) field and enter the frequency offset value. Step 5.
Operating Overview Saving and Recalling Instrument Setups Saving and Recalling Instrument Setups The save and recall functions allow you to store different instrument setups and retrieve them later, eliminating the task of re-configuring the Test Set. The number of available save registers depends on how many changes were made to the base instrument setup for each save. (See "BASE Settings" on page 50.
Operating Overview Saving and Recalling Instrument Setups To remove (clear) an individual save register Step 1. Specify where the register is stored using the Save/Recall field on the I/O CONFIGURE screen. Step 2. Press Recall. Step 3. Use the knob to position the cursor in front of the register to be removed from the Recall menu at the bottom-right of the screen. The register name and percentage of memory occupied by that register are indicated at the top of the screen. Step 4. Press Yes On/Off.
Operating Overview Saving and Recalling Instrument Setups BASE Settings The BASE register contains any field settings the user has saved that are different from the instrument preset state. It establishes a reference point for all future saves. If a base is not saved, the preset state is used as the reference. When you save an instrument setup, the new setup is compared to the base settings, and any differences are stored under the register name you supply.
Operating Overview Using USER Keys Using USER Keys You can use user keys to move quickly between fields on the same screen, and to access fields that are not normally available on the screen you are using. Local user keys are used to move between settings on the screen that is displayed. Five local user keys are available for each screen: k1, k2, k3, k4, and k5. When the user key is pressed, the cursor instantly moves to, and selects, the assigned field; eliminating the need to turn and push the knob.
Operating Overview Using USER Keys Assigning and Releasing USER Keys When defining user keys, the Assign function is used to create key definitions; the Release function removes the definitions. Re-assigning a user key to a different field automatically releases it from its previous setting. To assign local user keys Step 1. Move the cursor to the field that you want to assign to a local user key. Step 2. Press and release the Shift key, then the k4 key to access the Assign function.
Operating Overview Replacing Batteries Replacing Batteries There are two methods by which the Test Set backs up its RAM. One is a set of two AA batteries mounted behind the rear panel of the Test Set. You must periodically change these batteries. The second method of RAM backup is an internal battery. It is not user serviceable. CAUTION Failure to take prompt action may result in loss of RAM data including IBASIC programs and SAVE / RECALL states stored in the RAM.
Operating Overview Replacing Batteries 54 Chapter 2 Main Menu
3 Overview of the Test Set’s Built-In Tools • "Using RF Tools Program" on page 56 • "Using the Code Domain Analyzer" on page 67 • "Using the Spectrum Analyzer" on page 68 • "Using the Voltmeter and Audio Frequency Counter" on page 70 • "Using the Oscilloscope (Scope)" on page 71 • "Securing a Test Procedure" on page 75 • "Clearing RAM" on page 76 • "Using the LISTOPTS (list options) Program" on page 77 • "Using the DEMO Program" on page 78 • "Using the ST_PLT (store or plot) Program" on page 79 55 Main M
Overview of the Test Set’s Built-In Tools Using RF Tools Program Using RF Tools Program The RF Tools Program resides in the Test Set’s ROM. The following tests and utility programs are available in this program. See Figure 3-1 on page 57 for instructions on loading the RFTOOLS program. To run the tests or utilities in the RFTOOLS program: 1. Choose the test or utility you want to run from the list of choices. 2. Fill in the parameters that are displayed for each test.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Figure 3-1 Loading and Running RF Tools 1 Press Menu to display the Software Menu screen. 2 Position the cursor at Select Procedure Location: and select it. 3 Position the cursor at ROM and select it. 4 Position the cursor at Select Procedure Filename: and select it. ROM 5 Position the cursor at Choices: and select RFTOOLS. 6 Position the cursor at Run Test and select it. The Software is now loading.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Swept Gain This test measures the gain of a device by sweeping it over the specified frequency range. In the menu for this test, you can enter the frequency range over which the device is to be swept, the level into the device from the DUPLEX OUT port, and the maximum expected gain. This test requires two 6-dB pads (attenuators). The pads are put on the Test Set’s ANT IN and DUPLEX OUT ports to reduce impedance mismatch error at these ports.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Discrete Freq Insertion Loss This test measures the loss of a cable or device at a specified frequency. This test is the most accurate method for measuring insertion loss. In the menu for this test, you can enter the discrete frequency and signal level at which the measurement will be made. This test requires two 6-dB pads. The pads are put on the ANT IN and DUPLEX OUT ports on the Test Set to reduce impedance mismatch error at these ports.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Swept Return Loss This test radiates a test signal when testing antennas or cables with antennas attached to them. Verify that the level and frequency span used for the test cannot result in interference to other nearby antennas. To minimize interference when running the program, set the power level at the DUPLEX OUT port to the minimum value needed for good measurement resolution. Set the frequency range carefully.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Estimating Antenna Return Loss If you are measuring the return loss of an antenna connected to the end of a known good feed line, you can determine the approximate return loss of the antenna by subtracting twice the line loss.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Cable Fault NOTE Test Signal Can Cause Interference When testing cables attached to antennas, test signals will be radiated. Verify that the signal used for the test cannot result in interference to another antenna. This test operates over a wide frequency band. The test will always operate with a center frequency of 505 MHz. The frequency span however will be determined by the length of the cable measured.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Selecting Cable Type In the menu for this test, you can enter the following information: • Cable length • Cable length units • Pressing the knob toggles the selection between feet and meters. • Cable class • Pressing the knob allows selection of Heliax, RG, and custom options.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Typical cable fault return loss measurements. Return loss is a ratio of input power to reflected power. For example, if 100 Watts was applied to a cable and 10 Watts was returned, the return loss is 10 dB (10 log (100/10)). In the same example, if 1 Watt was returned, the return loss is 20 dB (10 log (100/1)).
Overview of the Test Set’s Built-In Tools Using RF Tools Program Replot Data Files This utility allows you to easily retrieve and display plots which were previously stored on an SRAM PC card. One or two plots may be displayed at one time. No measurements are performed. Transfer Stored Data This utility may be used to easily transfer data collection files (test results) from an SRAM PC card over the serial or HP-IB port. You do not need to write an IBASIC program. No measurements are performed.
Overview of the Test Set’s Built-In Tools Using RF Tools Program Catalog PC (Memory) Card This utility lists all the files contained on the PC card. The PC card that you want to catalog must be inserted prior to selecting this test.
Overview of the Test Set’s Built-In Tools Using the Code Domain Analyzer Using the Code Domain Analyzer The code domain analyzer graphically displays the power, phase, and timing of the CDMA signal’s 64 Walsh channels. It is a correlated measurement, requiring an external timing signal, such as the even second clock or the 16 × chip (19.6608 MHz) clock, to initiate a valid measurement.
Overview of the Test Set’s Built-In Tools Using the Spectrum Analyzer Using the Spectrum Analyzer Automatic Calibration During operation, the spectrum analyzer pauses for approximately 2 seconds every 5 minutes to recalibrate itself. This does not affect the accuracy of displayed measurements, but does cause a brief interruption of the displayed information during the process.
Overview of the Test Set’s Built-In Tools Using the Spectrum Analyzer Selecting the Spectrum Analyzer’s Controls Menus Several levels of menus are used to access the various controls associated with the spectrum analyzer (see "Spectrum Analyzer Controls Menus" on page 69). "Control Fields for Analog Measurements" on page 123 provides a description for each field on the spectrum analyzer’s menus.
Overview of the Test Set’s Built-In Tools Using the Voltmeter and Audio Frequency Counter Using the Voltmeter and Audio Frequency Counter The voltmeter can be used to measure ac and dc voltages. The input to the voltmeter is determined by the AF Anl In field on the AF ANALYZER screen. To measure external voltages: 1. Select the AF ANALYZER screen. 2. Set the AF Anl In field to Audio In. 3.
Overview of the Test Set’s Built-In Tools Using the Oscilloscope (Scope) Using the Oscilloscope (Scope) The built-in 50 kHz oscilloscope provides • multiple triggering formats (internal and external) • single-shot and pre-trigger viewing for single events • full marker capability with automatic level and time readout Time/division, volts/division and vertical offset are displayed and can be changed using the front-panel knob.
Overview of the Test Set’s Built-In Tools Using the Oscilloscope (Scope) Selecting the Oscilloscope’s Input Step 1. Press Shift, then screen. RF Anl (AF Anl) to select the AF ANALYZER Step 2. Select the AF Anl In field. A list of choices appears. Step 3. Select the desired input to the scope: • FM Demod for FM demodulated audio from input signals connected to the RF IN/OUT or ANT IN connectors. • AM Demod for AM demodulated audio from input signals connected to the RF IN/OUT or ANT IN connectors.
Overview of the Test Set’s Built-In Tools Using the Oscilloscope (Scope) Triggering the Oscilloscope You can control following triggering features of the oscilloscope: • Trigger external or internal • Automated or normal triggering • Continuous or single shot triggering • Trigger level • Trigger delay The oscilloscope is triggered using the Trigger menu. Select this menu with the following procedure: Step 1. Press Shift, then Spec Anl (Scope) to go to the SCOPE screen. Step 2.
Overview of the Test Set’s Built-In Tools Using IB_UTIL Programs Using IB_UTIL Programs See "Securing a Test Procedure" on page 75 for information about the SECURE_IT program. See "Clearing RAM" on page 76 for information about the RAM_MANAGER program. COPY_PL The COPY_PL program allows you to copy procedures and libraries from one PC card to another. See the HP 8935 Programmer’s Guide for more information about procedures and libraries.
Overview of the Test Set’s Built-In Tools Securing a Test Procedure Securing a Test Procedure The password option for securing a test procedure is accessed by loading and running the SECURE_IT ROM program. This program is accessed by running the IB_UTIL program. Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose ROM. Step 3. Select the Select Procedure Filename: field. a. Select IB_UTIL from the list of programs.
Overview of the Test Set’s Built-In Tools Clearing RAM Clearing RAM RAM can be cleared using the RAM_MANAGER program in the Test Set’s ROM. This program clears all RAM, including any SAVE/RECALL registers saved to Internal RAM. This program is accessed by running the IB_UTIL program. Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose ROM. Step 3. Select the Select Procedure Filename: field. •Select IB_UTIL from the list of programs.
Overview of the Test Set’s Built-In Tools Using the LISTOPTS (list options) Program Using the LISTOPTS (list options) Program You can list the options that are installed in your Test Set (if any) using the LISTOPTS program. LISTOPTS also displays the firmware version of your Test Set. To run the LISTOPTS program Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose ROM. Step 3. Select the Select Procedure Filename: field. Step 4.
Overview of the Test Set’s Built-In Tools Using the DEMO Program Using the DEMO Program You can use the DEMO program to learn about the capabilities of the Test Set. This program demonstrates some of the most useful features of the Test Set. To run the DEMO program Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose ROM. Step 3. Select the Select Procedure Filename: field. Step 4. Select DEMO from the list of programs. Step 5.
Overview of the Test Set’s Built-In Tools Using the ST_PLT (store or plot) Program Using the ST_PLT (store or plot) Program This program allows you to store a spectrum analyzer, or oscilloscope trace on PC card or to plot a stored trace from a PC card. To run the ST_PLT program Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose ROM. Step 3. Select the Select Procedure Filename: field. Step 4. Select ST_PLT from the list of programs. Step 5.
Overview of the Test Set’s Built-In Tools Using the ST_PLT (store or plot) Program 80 Chapter 3 Main Menu
4 CDMA Measurements - Screens and Control Fields • • • • • • “Average Power Measurements” on page 82 “Channel Power Measurements” on page 83 “Rho Measurements” on page 84 “Error Vector Magnitude (EVM) Measurements” on page 88 “Code Domain Measurements” on page 89 “Control Fields for CDMA Measurements” on page 93 81 Main Menu
CDMA Measurements - Screens and Control Fields Average Power Measurements Average Power Measurements CDMA Measurements Average Power Measurements Avg Pwr Avg Pwr displays the average power level of all signals at the RF IN/OUT port. The units (watts, volts, or dBm) can be changed by positioning the cursor in front of the units field and then pressing the desired units key. (See "Input Port" field on page 136.
CDMA Measurements - Screens and Control Fields Channel Power Measurements Channel Power Measurements Channel Power Measurements Chan Pwr Channel power is the absolute power level of the RF signal in a 1.23 MHz bandwidth centered around the RF channel or tune frequency setting. This measurement must be calibrated using the Chan Pwr Cal field each time the tune frequency is changed. Refer to the HP 8935 CDMA Base Station Tests Applications Guide for more information about channel power measurements.
CDMA Measurements - Screens and Control Fields Rho Measurements Rho Measurements Rho Measurements Rho Rho is a measure of CDMA waveform quality which indicates how well the measured signal (the pilot signal transmitted by the base station under test) correlates with the ideal reference waveform (the ideal pilot generated by the Test Set which is mathematically perfect). This measurement is done through a complex DSP algorithm. Perfect correlation is when rho is equal to 1. The CDMA standard specifies 0.
CDMA Measurements - Screens and Control Fields Rho Measurements Rho Measurements Frequency Error Frequency error is displayed when the Rho measurement is selected. Frequency error is the difference between the base station’s transmitter frequency and the frequency you enter in the Tune Freq field. Screens on which this measurement is displayed. • CDMA ANALYZER • CDMA GENERATOR Time Offset Time offset is displayed when the Rho measurement is selected.
CDMA Measurements - Screens and Control Fields Rho Measurements Figure 4-2 Rho Measurements Time Offset 86 Chapter 4 Main Menu
CDMA Measurements - Screens and Control Fields Rho Measurements Rho Measurements Carrier Feedthrough Carrier feedthrough is displayed when the Rho measurement is selected. Carrier feedthrough is a common cause of bad rho measurements. Carrier feedthrough is a result of RF carrier signal feeding through the I/Q modulator and getting on the output circuitry without getting modulated. A good carrier feedthrough level is lower than −25 dB (such as −29 dB).
CDMA Measurements - Screens and Control Fields Error Vector Magnitude (EVM) Measurements Error Vector Magnitude (EVM) Measurements Error Vector Magnitude (EVM) Measurements EVM EVM is a measurement of the accuracy of the phase and amplitude of the QPSK (Quadrature Phase Shift Keying) or Offset QPSK (OQPSK) modulation. Expressed as a percentage, it is the RMS magnitude value of the error vector which connects the ideal signal phasor to a measured signal phasor at the detection decision points.
CDMA Measurements - Screens and Control Fields Code Domain Measurements Code Domain Measurements Code Domain Measurements The following measurements are displayed on the CODE DOM (code domain analyzer) screen: power, fast power, timing and phase. Measurements are selected from the Measurement field on the Main controls menu. Time offset (Tm Ofs) and frequency offset (FreqOfs) are always displayed when any code domain measurement is made.
CDMA Measurements - Screens and Control Fields Code Domain Measurements Code Domain Measurements Code Domain Power (Power) Code domain power displays the power in each of the 64 Walsh channels, relative to the total power inside 1.23 MHz bandwidth centered at the tune frequency. The 64 Walsh codes (0 through 63) are represented by a vertical bar on the analyzer’s display. Because this is a relative measurement, the unit-of-measure is always dB.
Code Domain Measurements CDMA Measurements - Screens and Control Fields Code Domain Measurements Fast Power Fast power is a faster method of measuring code domain power. A value for Time Offset must be transferred from a non-fast power measurement before fast measurements begin, or when changes to any of the following fields occur: Data Rate, PN Offset, CDMA TB, Synth Ref. See the "Ofs Trnsfer" field on page 105 for more information.
CDMA Measurements - Screens and Control Fields Code Domain Measurements Code Domain Measurements Code Domain Phase (Phase) Code domain phase is the difference in phase between the pilot and other code channels (Walsh codes) within the same forward CDMA channel. It displays the phase error for each of the 64 Walsh channels relative to the pilot channel (Walsh 0). This measurement is indicated as positive or negative bars on the Test Set’s CODE DOM screen.
CDMA Measurements - Screens and Control Fields Amplitude ADCfs or ADC FS Control Fields for CDMA Measurements ADCfs or ADC FS ADCfs indicates how close the measured power level is to the maximum allowed input level for the analyzer’s Analog-to-Digital Converter (ADC). This level is affected by the Gain setting on the CODE DOM screen, the Input Atten, Gain, and, Pwr Gain settings on the CDMA ANALYZER screen, and the RF level of the signal connected to the Test Set.
CDMA Measurements - Screens and Control Fields Analyzer (CDMA analyzer) Analyzer (code domain analyzer) Analyzer (CDMA analyzer) The Analyzer field controls three functions: • Arm Meas arms the CDMA analyzer. The CDMA analyzer needs to be armed only when Single (see below) is selected. • Single/Cont selects between “single” measurements and “continuous” measurements. • When Single is chosen, you must arm each measurement by selecting the Arm Meas field (see above).
CDMA Measurements - Screens and Control Fields Auto Zero Anl Dir Anl Dir This field is used to select the type of signal (forward or reverse link) to analyze. • Fwd sets the analyzer to look for base station transmitter data (forward link). • Rev sets the analyzer to look for mobile transmitter data (reverse link). Default selection: Fwd Screens on which this field is present CDMA ANALYZER Anl Special Analyzer special modes change how IQ modulated signals are analyzed.
CDMA Measurements - Screens and Control Fields Car FT Chn Pwr Cal Car FT This field is a measurement display field. See "Carrier Feedthrough" on page 87 for more information about this measurement. Screens on which this field is present COD DOM (Code Domain Analyzer) Chn Pwr Cal This field is displayed when the channel power measurement is selected. It is used to calibrate the channel power measurement.
Controls CDMA Measurements - Screens and Control Fields Controls Controls Code domain analyzer settings are arranged into several menus that are accessed using the Controls field. The control groups are: • Main accesses the RF In/Ant, Tune Freq (or RF Channel), Measurement, and Analyzer fields. • Marker controls the marker to look at the level of individual Walsh channels. • Trigger accesses the trigger controls: Qual Event and Trig Event.
CDMA Measurements - Screens and Control Fields CW RF Path Data Rate CW RF Path This field selects the path for the RF generator’s signal. • Bypass disables the IQ modulator. This mode is used when generating standard AM, FM, or CW signals in the Test Set. • IQ enables the IQ modulator. See the "Data Source" field on page 99 for more information. Screens on which this field is present CDMA GENERATOR Data Rate This field allows receiver testing at data rates of 9.6 or 14.4 Kbps.
CDMA Measurements - Screens and Control Fields Data Source Data Source Data Source This field selects where the baseband quadrature spreader gets its data. This field is removed when the Gen Mode field is set to Noise. • Zeroes uses a data stream of all 0’s that is not encoded before being applied to the baseband quadrature spreader and output. • Ext uses external data from the DATA IN connector. This data is not encoded before being applied to the baseband quadrature spreader.
CDMA Measurements - Screens and Control Fields Even Sec In Gain Even Sec In This field controls the internal connection of the EVEN SECOND SYNC IN connector to the CDMA analyzer. • When Enable is selected, signals applied to the EVEN SECOND SYNC IN connector synchronize the timing circuits. • When Not is selected, input signals applied to the EVEN SECOND SYNC IN are ignored. This mode may be useful when signals other than an even-second clock are used for synchronization.
CDMA Measurements - Screens and Control Fields Gen Mode Gen Dir Gen Dir This field sets the link direction of the CDMA signal. • Fwd (forward) sets the CDMA generator to produce QPSK modulation to imitate a base station. The EQ Filter field is automatically set to EQ In to apply an equalizing filter to the I and Q paths as part of the baseband filtering, but it can be changed to Out. • Rev (reverse) sets the CDMA generator to produce OQPSK modulation to imitate a mobile station.
CDMA Measurements - Screens and Control Fields Gen Special Input Atten Gen Special Generator special modes change how IQ modulated signals are generated. • Normal sets the CDMA generator and CDMA analyzer to create and analyze signals with standard rotation. • Inverted sets reverse rotation for I and Q signals; opposite to the direction specified in the IS-95 standards. In this mode, the CDMA generator creates reverse-rotation IQ signals and the CDMA analyzer expects reverse-rotation IQ signals.
CDMA Measurements - Screens and Control Fields Meas Intvl Input Port Input Port This field selects which Test Set port to use as the RF input. This field is not displayed when measuring average power, since you must use the RF IN/OUT port to measure average power. CAUTION Instrument Damage To prevent instrument damage, do not exceed the maximum power level labeled at the connectors on your Test Set. The ANT IN connector is for measuring low level RF signals.
CDMA Measurements - Screens and Control Fields Measurement Num Avgs Measurement This field controls the type of code domain measurement to make: power, timing, or phase. It also controls the measurement "mode." • Single is used when you want to make one measurement. You must select the Arm Meas function of the Analyzer field before a measurement can be made. • Cont is used to continuously make measurements. Measurements are automatically re-armed after each measurement.
CDMA Measurements - Screens and Control Fields Output Port Ofs Trnsfer Ofs Trnsfer This field transfers the time offset value from the time offset measurement (displayed in TmOfs) to the Time Offset field automatically. Before selecting Ofs Trnsfer, you must make at least one of the following code domain measurements: • Power • Timing • Phase Operating Considerations When using this command programmatically, be sure a value for Tm Ofs has been obtained from a power, timing, or phase measurement.
CDMA Measurements - Screens and Control Fields PN Offset Pwr Gain PN Offset Use this field to enter the PN sequence offset index for your base station. Each whole offset is equal to 64 chips (= 52.08 µs). Fractional values are rounded off, and can be entered, in increments of 0.015625 (1 chip). Once entered, this value is shared by all CDMA screens. This value is used by the analyzer when the Even Sec In field on the CDMA GENERATOR screen is set to Enable.
CDMA Measurements - Screens and Control Fields Pwr Zero Pwr Intvl Pwr Intvl This field determines the length of the data block when measuring average power. The data block is a time record over which correlated measurements are computed. Range: 0.25 to 5.00 ms Screens on which this field is present CDMA ANALYZER Pwr Scale The upper part of this field is used to select the reference level for power measurements (relative to the total power of the entire CDMA channel).
CDMA Measurements - Screens and Control Fields Qual Event Qual Event Qual Event This field selects a trigger qualifier. The trigger qualifier serves as a precursor to the CDMA analyzer trigger event. Selecting a trigger qualifier is required when a time-delayed trigger event is desired, or if the trigger signal is externally supplied at the TRIGGER QUALIFIER IN connector. If a time-delayed trigger is used (see the "Trig Event" field on page 112), the qualifier starts the delay timer.
CDMA Measurements - Screens and Control Fields RF Gen Freq RF Channel RF Channel The RF Channel field is displayed when the RF Display field on the INSTRUMENT CONFIGURE screen is set to Chan. This field displays the current channel number. Channel tuning eliminates the need to enter transmit and receive frequencies directly into the Test Set.
CDMA Measurements - Screens and Control Fields RF In/Ant Threshold RF In/Ant This field selects the Test Set’s RF input. CAUTION The maximum safe level into the ANT IN connector is 60 mW. Exceeding this level could cause permanent damage to the Test Set. Screens on which this field is present CODE DOM (Code Domain Analyzer): main controls menu Threshold Enter the measurement display threshold for making code domain timing and phase measurements.
CDMA Measurements - Screens and Control Fields TmOfs Time Offset Time Offset This field allows you to manually enter a time offset. To obtain a value to enter in this field you must make at least one of the following measurements. • • • • Power Timing Phase Rho After making the measurement, access the FP Setup menu on the CODE DOM screen, and enter the value obtained from the Time Ofs field or, for rho measurements, the Time Offset measurement field on the CDMA ANALYZER screen.
CDMA Measurements - Screens and Control Fields Trig Event Tune Freq Trig Event This field determines when the trigger event to the CDMA analyzer occurs. When the selected trigger in this field is qualified by the selection in the Qual Event field, the CDMA analyzer is triggered. Choices • 27 ms is an internally generated clock. • 20 ms is an internally generated clock. • 80 ms is an internally generated clock. • 2 s is an internally generated clock.
Walsh Chan CDMA Measurements - Screens and Control Fields Walsh Chan Walsh Chan This field selects the Walsh channel to move the marker to. The marker can be moved by either entering the Walsh channel number using the keypad, or by using the cursor-control knob.
CDMA Measurements - Screens and Control Fields Walsh Chan Walsh Chan 114 Chapter 4 Main Menu
5 Analog Measurements - Screens and Control Fields • • • • • • • • • • • • • "AC Level Measurement" on page 116 “AM Depth Measurement” on page 116 “AF Freq Measurement” on page 117 “DC Level Measurement” on page 117 “Distn (Distortion) Measurement” on page 118 “Frequency Measurement” on page 119 “Frequency Error Measurement” on page 119 “TX Power Measurement” on page 120 “FM Deviation Measurement” on page 121 “AF Freq (Audio Frequency) Measurement” on page 121 “SINAD Measurement” on page 122 “SNR Measurem
Analog Measurements - Screens and Control Fields AC Level Measurement AM Depth Measurement Analog Measurements AC Level Measurement The type of measurement shown is dependent on the AF Anl In settings. AC Level is displayed when the AF Anl In field is set to SSB Demod, Audio In, Ext Mod, or Audio Out. The AC Level measurement field displays either rms potential (voltage) or audio power (Watts or dBm). See "Displaying AF Measurements" on page 37, or the "AF Anl In" field on page 123 for more information.
Analog Measurements - Screens and Control Fields DC Level Measurement AF Freq Measurement AF Freq Measurement The AF frequency measurement is the audio frequency of the signal present at the input selected in the AF Anl In field (on the AF ANALYZER screen). Four dashes (- - - -) indicate that no audio frequency is present to measure. See "SINAD, Distortion, SNR, AF Frequency, DC Level," on page 38 for more information. See also the "AF Anl In" field on page 123.
Analog Measurements - Screens and Control Fields Distn (Distortion) Measurement FM Deviation Measurement Distn (Distortion) Measurement This measurement field displays the percent of distortion for an audio signal tone. See "SINAD, Distortion, SNR, AF Frequency, DC Level," on page 38 for more information. Operating Considerations Set the Notch Freq field (on the AF ANALYZER screen) to match the AF frequency used for your distortion measurement.
Analog Measurements - Screens and Control Fields Frequency Error Measurement Frequency Measurement Frequency Measurement This measurement field displays the center frequency the signal being measured. Operating Considerations This measurement cannot be used for measuring CDMA signals; use the CDMA analyzer.
Analog Measurements - Screens and Control Fields TX Power Measurement TX Power Measurement TX Power Measurement Transmitter power measures RF power at the RF IN/OUT port. Operating Considerations Only the RF IN/OUT port can be used for measuring TX power. When the Input Port is set to Ant, four dashes (- - - -) appear in place of digits for this measurement. Use the spectrum analyzer to measure low-level RF power (≤60 mW) at the ANT IN port.
FM Deviation Measurement Analog Measurements - Screens and Control Fields AF Freq (Audio Frequency) Measurement FM Deviation Measurement This is the default setting for this measurement field. The FM deviation measurement is the frequency deviation of the carrier. This measurement field is only displayed when the AF Anl In field (on the AF ANALYZER screen) is set to FM Demod or FM Mod. See the "Displaying AF Measurements" on page 37 for more information. See also the "AF Anl In" field on page 123.
Analog Measurements - Screens and Control Fields SINAD Measurement SNR Measurement SINAD Measurement SINAD is the measure of the ratio of the signal+noise+distortion to the noise+distortion produced at the output of a receiver that is the result of a modulated signal input. This ratio is expressed in dB. See "SINAD, Distortion, SNR, AF Frequency, DC Level," on page 38 for more information.
Analog Measurements - Screens and Control Fields AF Cnt Gate AF Anl In Control Fields for Analog Measurements AF Anl In The audio frequency analyzer input selects the input for the analyzer. When selected, this field displays a list of choices. Signals can be analyzed from three different types of inputs: • The output of the AM, FM, or SSB demodulators. • The AUDIO IN, ANALOG MODULATION IN, and AUDIO OUT connectors. • The signal present at the AM or FM modulators for the RF generator.
Analog Measurements - Screens and Control Fields AFGen1 Freq AFGen1 To AFGen1 Freq This field sets the frequency for the first audio frequency sinewave generator.
Analog Measurements - Screens and Control Fields AFGen2 To AFGen2 Freq AFGen2 Freq This field sets the frequency for the second audio frequency sinewave generator.
Analog Measurements - Screens and Control Fields Amplitude Atten Hold Amplitude This field adjusts the amplitude of the RF generator. See for Atten Hold (below) for more information. Screens on which this field is displayed RF GENERATOR SPEC ANL: RF generator controls menu Atten Hold Attenuator hold prevents the fixed RF output attenuators from switching in and out, eliminating the loss of the output signal as the level is changed. This function is helpful when making squelch measurements.
Analog Measurements - Screens and Control Fields Auto/Norm Audio In Lo Audio In Lo This field sets the AUDIO IN LO connector’s state. • Gnd causes the center pin of the connector to be connected directly to chassis ground. • Float isolates the center pin of the connector from ground, providing a floating input to the AF analyzer. • 600 To Hi establishes a 600-ohm impedance between the center pins of the AUDIO IN LO and AUDIO IN HI connectors.
Analog Measurements - Screens and Control Fields Auto Zero Cont/Single Auto Zero This field is displayed for average power measurements. Auto is used to automatically zero the TX power measurement periodically during operation. Manual is used to override the Auto feature. When Manual is selected, you must manually zero the TX power measurement by selecting the TX Pwr Zero field.
Analog Measurements - Screens and Control Fields De-Emphasis De-Emp Gain De-Emp Gain De-emphasis gain displays and selects the desired AF analyzer de-emphasis amplifier gain. See the "Gain Cntl" field on page 134 for more information. Screens on which this field is displayed AF ANALYZER De-Emphasis This setting selects or bypasses the 750 µs de-emphasis networks in the audio analyzer and internal speaker circuitry.
Analog Measurements - Screens and Control Fields Detector Detector Detector This setting selects the type of detector used when measuring and displaying AF signal levels. Detector Types • RMS displays the root mean square (rms) value of signals. • RMS*SQRT2 displays the rms value of a signal multiplied by 2 . • Pk+ displays the positive peak value. • Pk− displays the negative peak value. • Pk±/2 adds the positive and negative peak values, and divides the sum by 2.
Analog Measurements - Screens and Control Fields Filter 1 Ext Load R Ext Load R External load resistance is used to calculate and display AF power. Power is calculated using the voltage measured at the AUDIO IN connections and the resistance value you enter into this field. This field is displayed only when the Audio In field on the AF ANALYZER screen is set to GND or Float. Operating Considerations To display audio power, set the AC Level measurement’s unit of measure to W (watts).
Analog Measurements - Screens and Control Fields Filter 2 Filter 2 Filter 2 This field selects an audio frequency filter which can be used to condition the audio signal before it is analyzed by the audio frequency analyzer. The following filter choices are available: • 300Hz LPF • 3kHz LPF • 15kHz LPF • >99kHz LP • 6kHz BPF Operating Considerations The audio from the Test Set’s speaker is not affected by Filter 1 or Filter 2 settings.
Analog Measurements - Screens and Control Fields Freq (marker) FM Coupling FM Coupling This field alters the FM modulator to allow DCFM from internal and external modulation sources. This field also selects ac or dc coupling between the RF generator’s frequency modulator and the ANALOG MODULATION IN connector. Operating Considerations This field should be set to DC whenever the AFGen2 To field is set to FM; this provides better modulation response at low data rates.
Analog Measurements - Screens and Control Fields Gain Cntl Gain Cntl Gain Cntl AF analyzer gain control specifies whether the AF analyzer’s gain settings are controlled automatically by AF autoranging (Auto), or by manual control (Hold). The following settings are affected by AF autoranging: • Input Gain • De-Emp Gain • Notch Gain Operating Considerations The normal mode of operation for the Gain Cntl field is Auto, allowing the instrument to adjust the AF gain settings for optimum measurement accuracy.
Analog Measurements - Screens and Control Fields Input Atten IF Filter IF Filter This field selects the desired IF filter bandwidth for modulated signals being analyzed. Screens on which this field is displayed RF ANALYZER Input Atten Input attenuation sets the amount of input attenuation for the RF IN/OUT and ANT IN connectors.
Analog Measurements - Screens and Control Fields Input Gain Input Port Input Gain This field displays and selects the gain of the AF analyzer’s input amplifier. The choices are 0 dB, 20 dB, or 40 dB. Refer to the Gain Cntl field more information. Screens on which this field is displayed AF ANALZYER Input Port This field selects the RF IN/OUT or ANT IN port for making RF measurements. The RF IN/OUT port must be used for making TX power measurements.
Internal Analog Measurements - Screens and Control Fields Level (div) Internal This field selects the trigger source. • Internal uses the signal being displayed for triggering. • Ext (TTL) uses the EXT SCOPE TRIGGER INPUT for triggering. This is a TTL level trigger (approximately 2.5 V). Screens on which this field is displayed SCOPE: trigger controls menu Level (div) This control is divided into two fields: The upper field (0.00) sets the internal trigger level as a function of vertical divisions.
Analog Measurements - Screens and Control Fields Lvl (marker) Lvl (marker) Lvl (marker) This measurement field displays the signal level of the signal at the current marker position on the spectrum analyzer. (See Figure 5-1 on page 133.) Operating Considerations The unit-of-measure for this field is dependent on the source of the signal being measured. For instance, when measuring a signal from the AUDIO IN connector, the amplitude is measured in Volts.
Analog Measurements - Screens and Control Fields Marker To (spectrum analyzer) Marker To Peak+ Marker To Peak+ Peak+ causes the marker to move to the maximum value of the average level measured on the display. Because this functions look at the average value for each displayed pixel, the marker may not appear directly on the displayed peak of a noisy signal.
Analog Measurements - Screens and Control Fields Mod In To No Pk/Avg Mod In To This modulation input field defines how an external modulation source is used with the RF generator. Two fields are used: • The upper field determines whether the ANALOG MODULATION IN signal is set for AM or FM modulation of the RF GENERATOR. • The lower field sets the modulation sensitivity. For instance, if FM (/Vpk) is selected for the upper field, and you set the lower field to 1.
Analog Measurements - Screens and Control Fields Notch Freq Normalize Normalize This area performs three display operations: • Save B saves the currently-displayed trace for the A-B operation. • A only provides a continuously-updated display (the “normal” mode of operation). • A-B displays the difference between the trace saved using Save B and the currently displayed trace. The comparison can yield either losses or gains in amplitude.
Analog Measurements - Screens and Control Fields Notch Gain Offset Freq Notch Gain This field displays and selects the gain of the AF analyzer’s notch filter amplifier. This amplifier is only used for making SINAD and distortion measurements. (See the "Gain Cntl" field on page 134 for more information.
Analog Measurements - Screens and Control Fields Pk Det To Output Port Output Port This field selects the RF generator’s output port. Higher RF generator levels are available at the DUPLEX OUT port than at the RF IN/OUT port. Operating Considerations CAUTION Applying reverse RF power to the DUPLEX OUT connector can damage the instrument. (A message is displayed when an overpower conditions occurs.
Analog Measurements - Screens and Control Fields Port/Sweep Port/Sweep Port/Sweep This control performs two functions: • The upper field specifies the output port of the tracking generator. • The lower field specifies whether the tracking generator sweeps from low-to-high frequencies (Norm), or from high-to-low frequencies (Invert). (The spectrum analyzer always sweeps from low to high frequencies.) The swept frequency range is determined by the Span setting in the spectrum analyzer’s main controls menu.
Position Analog Measurements - Screens and Control Fields Position Position This field indicates the number of scale divisions from the left side of the screen to the marker. Use the DATA ENTRY keys or cursor-control knob to move the marker to any point on the displayed signal.
Analog Measurements - Screens and Control Fields Ref Level Reset Ref Level Reference level sets the amplitude reference level for the top line of the display. All signals displayed are referenced to this line. Operating Considerations The unit-of-measure for the reference can be changed as needed. For instance, 0 dBm, 0.224 V, 107.0 dBmV, and 0.00100 W can all be used to represent the same level.
Analog Measurements - Screens and Control Fields RF Cnt Gate RF Channel RF Channel The RF Channel field is displayed on the screens listed below when the RF Display field on the INSTRUMENT CONFIGURE screen is set to Chan. This field displays the current channel number. Channel tuning eliminates the need to set transmit and receive frequencies directly into the Test Set.
Analog Measurements - Screens and Control Fields RF Gen Freq RF In/Ant RF Gen Freq This field sets the RF generator’s frequency. This field is displayed on the screens listed below when the RF Display field on the INSTRUMENT CONFIGURE screen is set to Freq. Screens on which this field is displayed SPEC ANL (When the Controls field is set to “RF Gen”) RF GENERATOR RF In/Ant This field selects the input port for the spectrum analyzer.
Analog Measurements - Screens and Control Fields Scope To Scope To Scope To This field selects the signal source for the oscilloscope. This allows you to bypass certain sections of the AF analyzer’s circuitry when viewing and measuring a signal. It also allows you to select measurement paths that include additional gain stages, improving the oscilloscope’s resolution when measuring low-level signals. • Input looks at the unfiltered signal directly from the input.
Analog Measurements - Screens and Control Fields Sensitivity (RF analyzer) Sensitivity (spectrum analyzer) Sensitivity (RF analyzer) RF analyzer sensitivity adds about 6 dB of sensitivity for the ANT IN port when High is selected and the Input Atten field is set to 0 dB. Operating Considerations Selecting High sensitivity may cause spectrum analyzer measurements to be uncalibrated when the ANT IN port is used (a message appears when this occurs).
Analog Measurements - Screens and Control Fields Span Settling Settling This field selects the settling time for making AF measurements. Lower frequency signals require additional settling time (Slow). Higher frequency measurements require less settling time (Fast). Operating Considerations Use Slow for ≤200 Hz signals. Use Fast for >200 Hz signals.
Analog Measurements - Screens and Control Fields Speaker ALC Speaker Vol Speaker ALC Speaker automatic level control enables/disables the ALC function for the instrument’s internal speaker. When On is selected, the speaker volume is independent of the signal level being measured. When Off is selected, the speaker volume is dependent on the signal level being measured. Screens on which this field is displayed AF ANALYZER Speaker Vol Speaker Volume enables/disables the instrument’s internal speaker.
Analog Measurements - Screens and Control Fields Squelch Squelch Squelch This setting determines the squelch operation when demodulating FM, AM, or SSB signals. Three settings are available: • Pot uses the front-panel SQUELCH knob for squelch level adjustment. • Open disables squelch operation. • Fixed sets the squelch to a fixed level, disabling the front-panel SQUELCH knob control.
Analog Measurements - Screens and Control Fields Time Track/Fixed Time This measurement displays the time elapsed from the trigger point to the current marker position. The Ref Set function can be used with this measurement to display time relative to a specific position. (See "Setting A Measurement Reference" on page 45.) Screens on which this field is displayed SCOPE: all control menus Time/div This field selects the horizontal sweep time per division.
Analog Measurements - Screens and Control Fields Trig-Delay Trig-Delay Trig-Delay The trigger delay is used to specify the time relationship between the trigger and displayed signal. • Positive values delay the measurement trigger by a specific period. The delayed trigger point is the left edge of the screen. • Negative values perform a pre-trigger function, displaying a section of the waveform before the trigger point.
Analog Measurements - Screens and Control Fields Tune Freq TX Pwr Meas Tune Freq This field is displayed when the RF Display field on the INSTRUMENT CONFIGURE screen is set to Freq. RF analyzer tune frequency sets the center frequency for the RF signal to be analyzed. Screens on which this field is displayed RF ANALYZER TX Pwr Meas The transmitter power measurement field specifies how transmitter power measurements are made: • Peak can be used to measure AM, FM, and un-modulated (CW) signals.
Analog Measurements - Screens and Control Fields TX Pwr Zero TX Pwr Zero TX Pwr Zero The transmitter power zero function establishes a 0.0000 W reference for measuring RF power at the RF IN/OUT port. Operating Considerations When power is applied to the RF IN/OUT connector, the temperature of the internal circuitry increases. This can cause changes in the TX power measurement when low power levels are measured immediately following high power measurements.
Analog Measurements - Screens and Control Fields Vert/div Vert Offset Vert/div Vertical sensitivity sets the vertical amplitude per division. Operating Considerations The value for this field is selected from a list of choices. Depending on the AF analyzer’s AF Anl In setting, the units for this field may be in Volts, kHz, or Percent (AM). For example; if the AF Anl In field is set to FM Demod, the amplitude is displayed in kHz/div.
6 Configuration - Screens and Control Fields • "Configuring the Instrument" on page 160 • "Setting the Date and Time" on page 160 • "Changing the Beeper’s Volume" on page 160 • "Turning Off User Messages" on page 160 • "Configuring for Printing A Screen" on page 161 • "Control Fields on the Configuration Screens" on page 162 159 Main Menu
Configuration - Screens and Control Fields Setting the Date and Time Turning Off User Messages Configuring the Instrument Setting the Date and Time The Test Set has a built-in clock that keeps track of the date and time. It is powered by an internal battery to keep it operating when the instrument is off. To set the date and time Step 1. Access the INSTRUMENT CONFIGURE screen. Step 2. Select the Date field and use the DATA ENTRY keys to enter the date (MMDDYY -- October 31, 1997 = 103197). Step 3.
Configuration - Screens and Control Fields Printing a Screen Printing a Screen Configuring for Printing A Screen Printing a Screen To Print A Screen’s Contents Step 1. Connect a printer to the appropriate connector (SERIAL 9, PARALLEL 15, HP-IB). Step 2. Go to the PRINTER CONFIGURE screen set the Printer Port: field to the appropriate type of printer connection. If HP-IB is selected, enter the HP-IB address (Printer Adrs) of the printer. Step 3. Select the type of printer you are using in the Model field.
Configuration - Screens and Control Fields Abort Print Antenna In Control Fields on the Configuration Screens Abort Print Select this field to interrupt the printing job in progress. Abort Print is not directly programmable over the HP-IB. Screen(s) Where Field is Present PRINTER CONFIGURE Antenna In This field is used to indicate losses or gains between the ANT IN port and the device-under-test. Enter a positive value to indicate a gain (such as an amplifier).
Configuration - Screens and Control Fields Base Freq (User Defined) Base Freq (User Defined) Base Freq (User Defined) The base frequency field sets the RF generator reference for channel 0 (zero) when the RF Chan Std field is set to USER-DEF, and the RF Display field is set to Chan.
Configuration - Screens and Control Fields Beeper Chan Space (User Defined) Beeper This field changes the audio beeper volume by selecting the desired level from a list of choices (Off, Quiet, Loud). The beeper always beeps when the instrument is turned on, regardless of this setting. Operating Considerations The beeper alerts you any time a message is displayed.
Configuration - Screens and Control Fields Display User Messages Data Length Data Length This field specifies the number of bits used for each word of serial data when using the serial port. This setting is retained when the instrument is turned off. Screen(s) Where Field is Present I/O CONFIGURE Date This field specifies the current date for the internal clock. The date can be read by a controller using HP-IB and printed on test results.
Configuration - Screens and Control Fields Duplex Out Ext Ref In Duplex Out This field is used to indicate losses or gains between the DUPLEX OUT port and the device-under-test. • Enter a positive value to indicate a gain (such as an amplifier gain). The RF generator’s level is automatically set that amount below what is indicated in the RF generator’s Amplitude field. (Example; if this value is 10 dB, and the Amplitude field shows 0 dBm, the actual level out this port is −10 dBm.
Configuration - Screens and Control Fields Firmware FF at End: FF at End: This field is used to specify if you want the printer to make a form feed (blank page) at the end of printing. Screen(s) Where Field is Present PRINTER CONFIGURE FF at Start: This field is used to specify if you want the printer to make a form feed (blank page) at the start of printing. Screen(s) Where Field is Present PRINTER CONFIGURE Firmware This field displays the current firmware revision for your Test Set.
Configuration - Screens and Control Fields Flow Control Flow Control Flow Control The flow control field is used when sending or receiving serial data. • None disables the Xon/Xoff function. • Xon/Xoff lets the Test Set “talk/listen” to the transceiver to alter the rate of the data being sent. • Hardware uses the serial port’s RTS and CTS lines to transfer data at high baud rates.
Configuration - Screens and Control Fields (Gen)-(Anl) (User Defined) Frame Clock Output Frame Clock Output This field selects the frame clock signal to send to the FRAME CLOCK OUT connector. Screen(s) Where Field is Present INSTRUMENT CONFIGURE (Gen)-(Anl) This field is used with the RF Offset field to specify the amount of frequency offset between the RF generator and RF analyzer. This field is always displayed when the RF Display field is set to Freq.
Configuration - Screens and Control Fields HP-IB Adrs Inst Echo HP-IB Adrs This field is used to display and change the HP-IB address of the Test Set. Operating Considerations The address can be set from 0 to 30 by using the DATA keys, or by pushing and then turning the cursor-control knob. This setting is retained when the instrument is turned off. Screen(s) Where Field is Present I/O CONFIGURE IBASIC Echo This field enables/disables screen and error message echoing from IBASIC.
Configuration - Screens and Control Fields Notch Coupl Lines/Page: Lines/Page: This field is used to specify how many lines are printed per page. Screen(s) Where Field is Present PRINTER CONFIGURE Mode This field sets the HP-IB operating mode. Talk&Lstn is used for normal HP-IB operation. Control is used to control external instruments using the Test Set. This setting is retained when the instrument is turned off.
Configuration - Screens and Control Fields Opt CDMA TB Print Title: Opt CDMA TB This control is provided for future enhancements. It must be set to Internal until options are available. Screen(s) Where Field is Present INSTRUMENT CONFIGURE Parity This field specifies the serial communication parity setting when using the serial ports. This setting is retained when the instrument is turned off.
Configuration - Screens and Control Fields Range Hold Range Hold Range Hold These fields enable/disable several autoranging and autotuning routines. Auto All enables these routines, providing automatic adjustment when making AF or RF measurements. Hold All disables these routines, requiring you to manually set the affected settings. The following fields are affected by the Range Hold field: • Input Atten in the RF ANALYZER and SPEC ANL screens. • Gain Cntl in the AF ANALYZER screen.
Configuration - Screens and Control Fields Ref Select Ref Select Ref Select This field selects the timebase reference signal to use for generating and analyzing signals. • Auto automatically selects an external reference if a signal of sufficient level is detected at the EXT REF IN. • Internal uses the Test Set’s internal timebase and ignores signals connected to the EXT REF IN connector. • External requires a valid reference signal to be connected to the EXT REF IN connector.
Configuration - Screens and Control Fields RF Chan Std RF Chan Std RF Chan Std Use the RF channel standard field to select the channel standard for the radio-under-test. The RF generator’s and the RF analyzer’s frequencies are automatically set to correspond to the channel number entered in the RF Channel field. RF Channel replaces the RF Gen Freq and Tune Freq fields on several screens when the RF Display field on the INSTRUMENT CONFIGURE screen is set to Chan.
Configuration - Screens and Control Fields RF Display RF Gen Volts RF Display This field selects the format for entering the RF generator’s and RF analyzer’s frequencies: • When Freq is selected, you enter the RF generator’s and the RF analyzer’s frequencies directly using the keypad or knob. • When Chan is selected, the RF Gen Freq and Tune Freq fields on all screens are replaced by the RF Channel field, and only the channel number is entered and displayed.
Configuration - Screens and Control Fields RF In/Out RF In/Out RF In/Out This field is used to indicate losses or gains between the RF IN/OUT port and the device-under-test. • Enter a positive value to indicate a gain (such as an amplifier gain). When the RF IN/OUT port is used as an output, the RF generator’s (or tracking generator’s) level is automatically set the specified amount below what is indicated in the RF generator’s Amplitude field.
Configuration - Screens and Control Fields RF Level Offset RF Offset RF Level Offset This field enables/disables the RF level offsets entered in the RF In/Out, Duplex Out, and Antenna In fields below it. • When set to On, the RF generator’s amplitude and RF analyzer’s power measurement are offset by the values entered in these fields. • When set to Off, the values in these fields are ignored.
Configuration - Screens and Control Fields Save/Recall Save/Recall Save/Recall This field specifies which memory device the Test Set accesses when the save and recall functions are used. • Internal is a section of internal RAM. RAM is also used for running IBASIC programs, which may require you to delete the save/recall registers if the program is very large. • Card is the front-panel MEMORY CARD (PC card) slot.
Configuration - Screens and Control Fields Serial Baud Serial No. Serial Baud This field selects the baud rate for serial communications when using the serial ports. Selecting this field displays a list of baud rate choices. This setting is maintained after the instrument is turned off. Screen(s) Where Field is Present I/O CONFIUGRE Serial_9 In This field selects the destination of characters received by the Test Set on the SERIAL PORT 9.
Configuration - Screens and Control Fields Total RAM Stop Length Stop Length This field specifies the number of stop bits (1 or 2) used for serial communications when using the serial port. This setting is maintained after the instrument is turned off. Screen(s) Where Field is Present I/O CONFIGURE Time This field sets the time-of-day for the instrument’s 24 hour clock. (Example, 4:53 PM is entered 16:53) Operating Considerations The internal clock still functions when the instrument is turned off.
Configuration - Screens and Control Fields Total RAM Total RAM 182 Chapter 6 Main Menu
7 Connectors Alphabetical Listing of "Connectors" on page 184 183 Main Menu
Connectors 10 MHz REF OUT ANALOG MODULATION IN Connectors 10 MHz REF OUT This connector furnishes a 10 MHz reference for external instruments. Operating Considerations NOTE The reference output frequency is always 10 MHz, independent of the selected input reference frequency. 16 × CHIP CLOCK 19.6608 MHz OUT This output provides a 19.6608 MHz (16 times the CDMA chip rate) square wave with a 50% duty cycle. This signal comes from the CDMA frame clocks.
Connectors ANT IN ANT IN ANT IN The antenna input is used for analyzing low-power RF signals (≤60 mW), and is typically used for off-the-air measurements. This port can be selected in the RF ANALYZER, or SPEC ANL screens. CAUTION Connecting a signal of >60 mW to the ANT IN port can cause instrument damage (although internal protection circuits can typically withstand a short-duration signal of several Watts).
Connectors AUDIO IN AUDIO IN AUDIO IN Two connectors are used to input audio signals to the AF analyzer: • HI is the main audio signal input connection. • LO is used for the audio signal reference. Three choices are available using the AF ANALYZER screen’s Audio In Lo field: • Gnd connects the center pin through approximately 100Ω to chassis ground. • Float is a floating input. • 600 To Hi provides a 600Ω internal load to match an audio source with an output impedance of 600Ω.
Connectors AUDIO OUT BASEBAND OUT (I and Q) AUDIO OUT This port is used to output signals from audio frequency generators 1 and 2. Operating Considerations The output level is set by the AF generators and is not affected by the front-panel VOLUME control. AC/DC coupling is selected using the Audio Out field. This field is available on the RF GENERATOR screen. BASEBAND OUT (I and Q) These outputs provide buffered versions of the I and Q drive signals.
Connectors Chassis Ground DUPLEX OUT Chassis Ground The chassis ground terminal provides a general chassis connection. CHIP CLOCK 1.2288 MHz OUT This output provides a 1.2288 MHz (CDMA chip rate) square wave with a 50% duty cycle. This signal comes from the CDMA frame clocks. DATA IN This connector provides a data input to the CDMA generator. DUPLEX OUT This connector is an output for the RF generator and tracking generator.
Connectors EVEN SECOND SYNC IN EXT SCOPE TRIG IN EVEN SECOND SYNC IN This port is an input for the even second clock from the base station under test. A positive edge on this connector starts two timers. One timer, after reaching terminal counts, starts CDMA frame clocks. The other timer starts pilot PN sequence generation. The Even Sec In field on the CDMA GENERATOR screen controls this port. See the "Even Sec In" field on page 100. EXT REF IN This connector allows you to input an external reference.
Connectors FRAME CLOCK OUT HP-IB FRAME CLOCK OUT This output provides an external connection to several internal clocks. The clocks are selected using the Frame Clock Output field on the INSTRUMENT CONFIGURE screen. The frame clock selections are as follows: • • • • 20.00 ms 26.67 ms 80.00 ms 2.00 s HP-IB This connector is optional on the Test Set. This connector allows communication between the Test Set and other instruments or computers using the Hewlett-Packard Interface Bus (HP-IB).
Connectors MEMORY CARD Slot PARALLEL PORT 16 MEMORY CARD Slot This front-panel opening is where PC cards are inserted. PARALLEL PORT 15 This port is used with printers requiring a parallel interface when printing screen images or test results. Set the Printer Port: field (on the PRINTER CONFIGURE screen or TESTS (Printer Setup) screen) to Parallel to print to this port. Use address PARALLEL_15 when sending data to this port from IBASIC programs. Pin numbers are embossed on the connector.
Connectors RF IN/OUT SCOPE MONITOR OUTPUT RF IN/OUT This Type-N connection is used to output signals from the RF generator and to input RF signals. CAUTION Overpower Damage — Refer to the Test Set’s connector panel for maximum input power level. Exceeding this level can cause permanent instrument damage. If the RF power at the RF IN/OUT port exceeds allowable limits, a loud warning signal sounds and a message appears at the top of the screen.
Connectors SERIAL PORTs 9, 10, and 11 SERIAL PORTs 9, 10, and 11 SERIAL PORTs 9, 10, and 11 The serial ports are used to input and output serial data for entering programs, printing tests results and screen images, and sending test results to a connected controller, disk drive, or terminal. Operating Considerations The serial communications settings are defined on the I/O CONFIGURE screen. SERIAL PORT 9 must be used for serial printing.
Connectors TRIGGER QUALIFIER IN VIDEO OUT TRIGGER QUALIFIER IN This input is active when an external trigger qualifier is selected with the Qual Event field on the CDMA ANALYZER and CODE DOM screens. If the trigger is to occur on the TRIGGER QUALIFIER IN signal, select Delay in the Trig Event field and select a delay of 0.0 µs. If the TRIGGER QUALIFIER IN signal is a qualifier, select a trigger source in the Trig Event field.
8 Accessories, Manuals, Support 195 Main Menu
Accessories, Manuals, Support Modifications Modifications The following information can be found in the HP 8935 Assembly Level Repair Manual: • Hardware Upgrades/Modifications • Firmware Upgrades • Power Cables 196 Chapter 8 Main Menu
Accessories, Manuals, Support Accessories Accessories Table 8-1 Accessories Description Ordering Number None available at this time. External Monitor The CRT’s Video Output drives a multisync monitor at 19.2 kHz (analog). Examples of this type of monitor include the Electrohome ECM 1410-DMS 14-inch color monitor and the EVM 1242-P4VID 12-inch monochrome monitor.
Accessories, Manuals, Support Accessories Test Software The Radio Test Software performs automated tests on radios used in various radio communication systems. Each test package is contained on an individual memory card.
Accessories, Manuals, Support HP Support for Your Instrument HP Support for Your Instrument Getting Help If you have problems using this Test Set, and cannot find the solution in these documents or the Help screens, please use one of the following contacts: • Your local or regional sales office listed in table 8-5, "HP Sales and Service Offices" on page 200.) • U.S.
Accessories, Manuals, Support HP Support for Your Instrument Customer Training Hewlett-Packard offers customers a variety of training materials and classes that explain the theory and applications of many HP products. Contact your HP regional sales office to arrange training for you or your group. Table 8-5 HP Sales and Service Offices United States of America U.S. Instrument Support Center For Test & Measurement Equipment Repair & Calibration.
Accessories, Manuals, Support HP Support for Your Instrument Asia Sales and Service Hewlett-Packard Asia Ltd. 22-30/F Peregrine Tower Lippo Center 89 Queensway, Central Hong Kong G.P.O. Box 863 Hong Kong Japan Sales and Service Yokogawa-Hewlett-Packard Ltd. 3-29-21, Takaido-Higashi Suginami-Ku, Tokyo 168 Telephone: 81 3 3331-6111 Fax: 81 3 3331-6631 Telephone: 41-22-780-4111 Fax: 41-22-780-4770 Telephone: 852-848-7777 Fax: 852-868-4997 Australia, New Zealand Sales and Service Hewlett-Packard Ltd. P.O.
Accessories, Manuals, Support HP Support for Your Instrument 202 Chapter 8 Main Menu
9 Error Messages 203 Main Menu
Error Messages General Information About Error Messages General Information About Error Messages Information concerning error messages displayed by the Test Set may be found in one of the following manuals: • HP 8935 Programmer’s Guide • HP 8935 Assembly Level Repair Manual • HP Instrument BASIC User’s Handbook: • A Beginner’s Guide to SCPI The format of the displayed message determines which manual contains information about the error message.
Error Messages General Information About Error Messages Negative Numbered Error Messages Negative numbers preceding the error messages text correspond to the error conditions outlined in the Standard Commands for Programmable Instruments (SCPI).
Error Messages General Information About Error Messages HP-IB Error Messages HP-IB Error Messages are associated with HP-IB operation. Refer to the Programmers Guide for information on HP-IB error messages. HP-IB error messages take the form: HP-IB Error: -XX or HP-IB Error For example: HP-IB Error: -410 Query INTERRUPTED. or HP-IB Error: Input value out of range. Text Only Error Messages Text only error messages are generally associated with manual operation of the Test Set.
Error Messages General Information About Error Messages The Message Display During instrument operation, various messages may appear on the Test Set’s display. Prompt-type messages generally appear on the first line of the Test Set’s display. General operating and error messages usually appear on the second line of the display. Some messages are persistent; they remain displayed until the error condition no longer exists, or until another persistent message with greater priority occurs.
Error Messages General Information About Error Messages Text Only Error Messages Operation errors generally occur when you try to do something the Test Set was not designed to do. Most messages tell you what to do to correct the problem, (turn something off, reduce a field’s value, press a certain key,…and so forth). Some common messages are listed here: • All self tests passed. • The Test Set did not detect any hardware or firmware failures during its initial self-diagnostics.
Error Messages General Information About Error Messages • Cal file checksum incorrect - initializing file. This error usually occurs after changing the Test Set’s firmware ROM’s. It is not a problem in that instance, but should not re-appear during subsequent operation of the Test Set. • One or more self tests failed. Error code: XXXX An instrument failure was detected when the Test Set was turned on. (For example, having a stuck front-panel key during turn on.
Error Messages General Information About Error Messages 210 Chapter 9 Main Menu
Index ---meaning of, squelch, 153 meaning of, TX power measurement, 36 meaning of, TX power measurements, 120 Symbols # of Frames data source, 99 % delta key, 26 % key, 26 +/- key, 30 Index Numerics 10 MHz REF OUTPUT connector, 184 16 x CHIP CLOCK connector, 184 19.
Index A Abort Print field Printer Configure screen, 162 abort printing, 161 ac coupling input, 133 output, 127 AC level peak detector, 143 AC Level field AF Analyzer screen, 116 RF Analyzer screen, 116 ac level measurements, 37 accessories, 197 ADC FS field CDMA Analyzer screen, 93 ADC FS measurements, 82, 83 ADCFS field CDMA Analyzer screen, 82, 83 CDMA Generator screen, 82, 83 ADCfs field CDMA Generator screen, 93 Code Domain Analyzer screen, 93 address HP-IB, test set, 170 AF analyzer input, 123 signal
Index description, 185 for off-the-air measurements, 136 for RF measurements, 136 gain at, 162 input attenuation, 135 loss at, 162 sensitivity, 150 Antenna In field Instrument Configure screen, 162 Arm Meas, 94 arrow down key, 42 arrow up key, 42 ASCII terminal configuring, 180 ASSIGN, 52 Assign key, 52 assistance call center, Europe, 199 call center, United States, 199 HP Direct, Canada, 199 HP Direct, Korea, 199 Atten Hold field RF Generator screen, 126 attenuation automatic control, 135 input, RF analyz
Index C cable fault measurements, 62 calibration channel power measurements, 96 spectrum analyzer, 68 CarFT field Code Domain Analyzer screen, 87, 96 carrier feedthrough measurements, 87 Carrier Feedthru field CDMA Analyzer screen, 87 CDMA Generator screen, 87 catalog memory card, 66 CDMA Analyzer screen ADC FS field, 82, 83, 93 Analyzer field, 94 Anl Dir field, 95 Anl Special field, 95 Auto Zero field, 95 Avg Pwr field, 82 Carrier Feedthru field, 87 Chan Pwr field, 83 Chn Pwr Cal field, 96 Even Sec In fie
Index SCOPE MONITOR OUTPUT, 192 SERIAL PORT 10, 193 SERIAL PORT 11, 193 SERIAL PORT 9, 193 TRIGGER QUALIFIER IN, 194 VIDEO OUT, 194 Cont/Single field Oscilloscope screen, 128 continuous measurements, 94 Controls field Code Domain Analyzer screen, 97 Oscilloscope screen, 128 Spectrum Analyzer screen, 128 COPY_PL, IB_UTIL ROM program, 74 counter AF, 123 RF, 147 coupling ac, 127, 133 dc, 127, 133 notch frequency, 171 cursor control knob increment setting of, 42 CW RF Path field CDMA Generator screen, 98 D da
Index E Eb/No, 101 EEX key , 30 emf voltage, 176 Error Message key, 25 error messages, 204 IBASIC echo, 170 operation, 208 error vector magnitude.
Index G gain automatic control, 134 between ANT IN and device-under-test, 162 between DUPLEX OUT and device-under-test, 166 between RF IN/OUT and device-under-test, 177 de-emphasis, 129 input, 136 manual control, 134 notch filter, 142 Gain Cntl field AF Analyzer screen, 134 Gain field CDMA Analyzer screen, 100 gain measurement, swept, 58 gate time, 123 RF counter, 147 Gen Dir field CDMA Generator screen, 101 Gen Mode field CDMA Generator screen, 101 Gen Special field CDMA Generator screen, 102 (Gen)-(Anl)
Index I I BASEBAND OUT connector, 187 I/O Config key, 25 I/O Configure screen Data Length field, 165 Flow Control field, 168 HP-IB Address field, 170 IBASIC Echo field, 170 Inst Echo field, 170 Mode field, 171 Parity field, 172 Save/Recall field, 179 Serial Baud field, 180 Serial In field, 180 Stop Length field, 181 IB_UTIL COPY_PL, 74 FILE_XFER, 74 RAM_MANAGER, 76 RAM_USAGE, 74 ROM program, 74 SECURE_IT, 75 IBASIC controller configuring, 180 IBASIC Echo field I/O Configure screen, 170 IBASIC error message
Index K k1 through k5 keys, 51 k1’ through k3’ keys, 51 keyboard external, 180 keys %, 26 % delta, 26 +/-, 30 AF Anl, 25 Assign, 52 Avg, 46 CDMA Anl, 25 CDMA Gen, 25 Code Dom, 25 dB, 26 dBm, 26 dBuV, 26 down-arrow , 42 EEX, 30 Error Message, 25 GHz, 26 Help, 25 Hi Limit, 43 Hz, 26 I/O Config, 25 Incr (divide-by)10, 42 Incr Set, 42 Incr x10, 42 Inst Config, 25 k1 through k5, 51 k1’ through k3’, 51 kHz, 26 Lo Limit, 43 Meter, 39 MHz, 26 ms, 26 mV, 26 mW, 26 On/Off, 39, 44, 45, 46, 49 ppm, 26 Printer Config ,
Index L level ac, 37 dc, 38 oscilloscope, 138 reference for spectrum analyzer, 146 Level (div) field Oscilloscope screen, 137 limits indicators, 43 pass/fail, 43 removing, 44 setting, 43 Lines/Page field Printer Configure screen, 171 LISTOPTS, 77 LO indicator, 43 Lo Limit key, 43 loss between ANT IN and device-under-test, 162 between DUPLEX and device-under-test, 166 between RF IN/OUT and device-under-test, 177 low limit removing, 44 setting, 43 low-level RF power measurements, 120 Lucent software, 198 Lvl
Index Model field Printer Configure screen, 171 modulation external AM, 140 external, FM , 140 external, input, 140 input, 140 input, coupling, 133 OQPSK, 101 QPSK, 101 sensitivity, input, 140 monitor, external, 197 ms key, 26 mV key, 26 mW key, 26 N names printout, 172 registers, 49 NAMPS, 175 negative edge triggering, 137 No Pk/Avg field Spectrum Analyzer screen, 140 Normalize field Spectrum Analyzer screen, 141 Nortel software, 198 Notch oscilloscope filters, 72 Notch Coupl field Instrument Configure s
Index Time/div field, 154 Trig-Delay field, 155 Vert Offset field, 158 Vert/div field, 158 output coupling, 127 RF, 143, 144 tracking generator, 144 Output Port field CDMA Generator screen, 105 Oscilloscope screen, 143 RF Generator screen, 143 Spectrum Analyzer screen, 143 overpower at RF IN/OUT connector, 136 damage, at ANT IN, 36 damage, at ANT IN connector, 120, 148 damage, at DUPLEX, 143 warning, 136 overpower damage, 24 overview of operation, 33 P PARALLEL PORT 15 connector, 191 PARALLEL PORT 16 conn
Index Q Q BASEBAND OUT connector, 187 QPSK modulation, 101 Qual Event field CDMA Analyzer screen, 108 Code Domain Analyzer screen, 108 R radio test software, 198 RAM back-up batteries, 53 clearing, 76 disk allocations, 74 loss of data, 53 total available, 181 total installed, 74 RAM_MANAGER, IB_UTIL ROM program, 76 RAM_USAGE, IB_UTIL ROM program, 74 random data source, 99 Range Hold field Instrument Configure screen, 173 recall instrument setups, 48 saved register with hardware change, 50 settings, 48 Rec
Index output, 144 output port, 143 RF Generator screen AF Freq field, 117 AFGen1 Freq field, 124 AFGen1 To field, 124 AFGen2 Freq field, 125 AFGEN2 To field, 125 AM Depth field, 116 Amplitude field, 126 Atten Hold field, 126 Audio Out field, 127 Distn field, 118 FM Coupling field, 133 FM Deviation field, 118, 121 Frequency Error field, 119 Frequency field, 119 Mod In To field, 140 Output Port field, 143 RF Gen Freq field, 148 SINAD field, 122 SNR field, 122 RF In/Ant field Code Domain Analyzer screen, 110
Index SERIAL PORT 11 connector, 193 SERIAL PORT 9 connector, 193 serial port pin assignments, 193 SERVICE4. See the HP 8935 Assembly Level Repair Manual.
Index T TACS, 175 talk & listen, 171 Threshold field Code Domain Analyzer screen, 110 time markers, 154 Time (marker) field Oscilloscope screen, 154 time and date, 160 Time field Configure Instrument screen, 181 Instrument Configure screen, 160 Time Offset field CDMA Analyzer screen, 85 CDMA Generator screen, 85 Code Domain Analyzer screen, 111 time offset measurements, 85 Time/div field Oscilloscope screen, 154 timebase external output, 184 title for printout, 172 TmOfs field Code Domain Analyzer screen,
Index V V key, 26 variable frequency notch filter, 141 version number firmware, 167 Vert Offset field Oscilloscope screen, 158 Vert/div field Oscilloscope screen, 158 vertical offset oscilloscope, 138, 158 vertical sensitivity oscilloscope, 158 video averaging spectrum analyzer, 140 VIDEO OUT connector, 194 voltage measurements, 116 RF, across 50 ohm load, 176 RF, emf (open circuit), 176 volume beeper, 160, 164 internal speaker, 152 W W key, 26 Walsh Chan field Code Domain Analyzer screen, 113 web site He
Index Z zero reference transmitter power, 157 Zeroes data source, 99 zeroing power meter, 157 228 Index Main Menu
