W Watkins-Johnson Company Repeater Manual WATKINS-JOHNSON COMPANY 3333 Hillview Avenue Palo Alto, CA 94304-1223
Watkins-Johnson Company PCS Repeater Manual “This drawing, print, or document and subject matter disclosed herein are proprietary items to which Watkins-Johnson Company retains the exclusive right of dissemination, reproduction, manufacture and sale. This drawing, print or document is submitted in confidence for consideration by the designated recipient or intended using organization alone unless permission for further disclosure is expressly granted in writing.
Repeater Table of Contents Table of Contents Section Topic Chapter 1 General Information and Safety Precautions Introduction Specifications Safety Considerations Description Mechanical Environmental Conditions Installation Introduction Unpacking and Inspection Preparation For Use Pre-Installation Information Installation Information Repeater Initial Turn-On Procedure Setup Isolation and Alignment Procedure Multicarrier & FCC Spurious Connectors Storage Packing for Reshipment or Storage Operation Introd
Repeater General Information and Safety Precautions CHAPTER 1 GENERAL INFORMATION AND SAFETY PRECAUTIONS 1-1 INTRODUCTION This manual provides information pertaining to the installation, operation, and maintenance of the Watkins-Johnson Repeaters, shown in Figure 1-1. The model number represents the type of repeater. This manual covers the following types of repeaters. The model numbers and letters are defined in the following example.
Repeater General Information and Safety Precautions This manual is divided into five chapters, the first four covering a particular topic for the operation and maintenance of the unit. Chapter 5 includes drawings to assist in mounting WJ repeaters.
Repeater General Information and Safety Precautions Figure 1-1.
Repeater General Information and Safety Precautions Figure 1-2.
Repeater General Information and Safety Precautions Chapter 1 provides a general description of the Repeater and summarizes the electrical, mechanical, and environmental characteristics. It also provides a tabular listing of the Repeater performance specifications. Safety precautions to be observed while operating or servicing the unit are also explained. Chapter 2 provides instructions for the initial inspection and installation of the Repeater.
Repeater General Information and Safety Precautions 1-2 SPECIFICATIONS Table 1-1. R1910 Specification DESCRIPTION SPECIFICATION Frequency Band AD, BE, or FC Output Power 100 mWatts CDMA 500 mWatts TDMA 500 mWatts PCS-1900 (GSM) Filter Bandwidth Noise Figure 1.
Repeater General Information and Safety Precautions Table 1-2. R1920 Specification DESCRIPTION SPECIFICATION Frequency Band AD, BE, or FC Output Power 8 Watts CDMA 10 Watts TDMA 15 Watts GSM-1900 Filter Bandwidth Noise Figure 1.
Repeater General Information and Safety Precautions Table 1-3. R1930 Specification DESCRIPTION SPECIFICATION Frequency Band AD, BE, or FC Output Power 4 Watts Filter Bandwidth 1.
Repeater General Information and Safety Precautions Table 1-4. R1940 Specification DESCRIPTION SPECIFICATION Frequency Band AD, BE, or FC Output Power 2 Watts Filter Bandwidth 1.
Repeater General Information and Safety Precautions Table 1-1. R810 Specification DESCRIPTION SPECIFICATION Frequency Band A or B Output Power 100 mWatts Filter Bandwidth Entire A or B band Noise Figure 4 dB Typical Maximum Input without damage -10 dBm Input Impedance 50 ohms Gain Range 40 dB to 70 dB Gain Steps 2 dB Signal Delay 5 usec max Power 115 / 230 VAC, 60 / 50 Hz, 1.6 / 0.
Repeater General Information and Safety Precautions Table 1-1.
Repeater General Information and Safety Precautions NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Repeater General Information and Safety Precautions The repeater receives the basestation signal via an external antenna see Figure 1-3. This signal is amplified and filtered by the repeater and ultimately retransmitted via a second antenna. The entire process is duplicated for the reverse path where the handset signal is amplified and filtered and retransmitted to the basestation.
Repeater General Information and Safety Precautions The R1920/30/40 and R820 a 12 x 16 x 3 tower mount unit. A mounting bracket is provided for installation. The unit is designed to withstand a NEMA 4X type environment. 1-6 ENVIRONMENTAL CONDITIONS 1-6.1 Non-operating Environmental Conditions The Repeater will survive strains, jars, vibrations, or other conditions incident to normal maintenance, transportation, and handling.
Repeater Installation CHAPTER 2 INSTALLATION 2-1 INTRODUCTION This chapter provides information for the installation, setup and alignment of the R19X0 PCS Repeater. The information consists of procedures for unpacking, inspection, and preparation for reshipment or storage, and description of unit connectors. It also provides initial start-up instructions and installation verification tests. 2-2 UNPACKING AND INSPECTION Examine the shipping carton for damage before unpacking the unit.
Repeater 2-3.2 Installation Software Installation The repeater control application provided on 3.5” floppy disks or CD-ROM, runs on any Personal Computer (PC) running Microsoft Windows 95, 98, or NT 4.0 or higher. The computer must also have one of two serial communications ports available for use, COM 1 or COM 2. To install the application, insert disk 1 into floppy disk drive A: and from the Start menu select Run and enter “a:\setup” in the text box of the Run window.
Repeater Installation 2-5.1 Donor Antenna Installation The Donor antenna will be mounted outside. The antenna should be installed so that it is in line-ofsight of the base station and is pointed directly at it. If there is an arrow or polarity marking indicated on the antenna, ensure that it is pointing up. Be sure that the antenna or mast is properly grounded with a grounding strap. For clearances, grounding and mounting requirements please refer to Article 810 of NEC handbook.
Repeater Installation Ambient temperature in the area where the unit is installed should not exceed 45°C. Be sure that unit is positioned upright to permit adequate air flow and that nearby equipment does not discharge hot air directly on the unit. The installation should allow a free flow of air around the outer surfaces of the chassis. Access to the bottom should be allowed so that input and output connections can be conveniently made or changed if desired.
Repeater WJ # 860000860000860000860000- Installation Connects to: AC Battery Modem Remote control Cable Description 3 Pin Mini-Change 6-Pin Mini-Change 3-Pin Micro-Change 5-Pin Micro-Change Manufacturer Brad Harrison Brad Harrison Brad Harrison Brad Harrison MFG # 40903 41621 703000D02F12 705000A13F060 The Modem cable should be wired to the modem line surge protector (refer to section 2-5.6).
Repeater Installation H-115-3 U-Bolt Thomas & Betts(Superstrut) 99343 Power Splitter Tessco 2-6 REPEATER INITIAL TURN-ON PROCEDURE Verify all RF connectors are tightened and cables and antennas are secured. On the R1910 turn on the switch J1 located at the bottom of the unit and verify PWR led is illuminated green as well as the AMP and OSC LED’s. For the R1920/30/40 remove the access cover push power switch, it should illuminate red. 2-7 SETUP 2-7.
Repeater Installation 2-8 ISOLATION AND ALIGNMENT PROCEDURES After completing the installation, turn-on procedure, and setup you must align and verify proper operation of the R19XX. Note: Watkins-Johnson repeaters incorporate an over power protection algorithm. This algorithm detects when the repeater is transmitting at a power level above that allowed by the FCC. The repeater continuously reduces the gain of the repeater until the output power is reduced to an acceptable power level.
Repeater 2.8.2 Installation ANTENNA ALIGNMENT PROCEDURE a. Ensure correct Channel # is displayed and RF is turned ON. For multicarrier filters, the Channel # should be tuned to the center of the desired passband. b. Increase the Downlink gain until signal is present on RSSI. c. Adjust Donor Antenna for maximum signal deflection on RSSI. d. Set FWD gain to desired level. e. When ready, click the “OSC Test” button on the windows control software. f.
Repeater 2-9.1 Installation METHOD 1 – MULTIPLE REPEATERS This method is straightforward and actually increases the composite output power of the system by maintaining the maximum output power per carrier. For example, a repeater with a 10Watt output will provide a composite of 20 Watts if used in a 2 repeater configuration where each repeater transmits 1 signal. See the Figure 1 below. Figure 1 Multicarrier for Highest Output Power This arrangement can be expanded to more carriers if necessary.
Repeater Installation 2-9.2 Method 2 – Wider Bandwidth Repeater This method is much less costly but must be used and deployed carefully. The repeater in this case uses a filter that passes 2 or more signals. The inter-modulation products that are produced by these signals must be kept to below -13dBm to comply with the FCC (Note that the inband spurious may need to be kept below –13dBm in order to comply with an air interface standard).
Repeater Installation Notice how simple the deployment is. No combiner or dual polarized antenna is required. This method is the lowest cost method but sacrifices output power. The intermodulation products produced with Method 2 will look something like Figure 3. Your PCS Band Freq 1 Freq 2 A A B B C C Carriers Spaced "X" MHz apart Difference between Freq 1 and Lower Band Edge Difference between Freq 2 and Upper Band Edge Figure 3 The 2 large signals depict the carriers (Freq 1 & Freq 2).
Repeater Installation Table 1 Output Power vs. Signal Number for Indoor Repeaters Air Interface CDMA TDMA GSM # of Carriers 1 or more 1 2 or more 1 2 or more R1910 Composite Power (dBm) 20 27 20 27 20 Spurious A,B,C < -13dBm < -13dBm < -13dBm < -13dBm < -13dBm CDMA Table 2 identifies the number of channels that must be left unoccupied between the CDMA carrier and the licensed band edge. The maximum composite output power can be obtained when the CDMA carriers are positioned adjacent (i.e.
Repeater Installation R1920C Chart 1 CDMA out of band spurious limitations Composite Output Power (dBm) T wo CDMA carriers spaced "X" MHz apart vs The frequency difference from one carrier to the band edge 60 39 39 39 34 29 5X 4X 3X 2X 1X 40 20 0 Multiples of "X" from carrier to band edge R1930C Chart 2 CDMA out of band spurious limitations Composite Output Power (dBm) T wo CDMA carriers spaced "X" MHz apart vs The frequency difference from one carrier to the band edge 40 30 20 10 0 36
Repeater Installation R1920T Chart 4 TDMA out of band spurious limitations T wo TDMA carriers spaced "X" MHz apart vs The frequency difference from one carrier to the band edge Composite Output Power (dBm) 38 35 40 30 20 10 0 5X 4X 32 29 26 3X 2X 1X Multiples of "X" from carrier to band edge R1920G Chart 5 GSM out of band spurious limitations T wo GSM carriers spaced "X" MHz apart vs The frequency difference from one carrier to the band edge Composite Output Power (dBm) 38 40 30 20 10 0 5X
Repeater 2-10 Installation CONNECTORS Figure 2-7.1 shows the connectors and Table 2-1 provides a description of each connector on the R1910 unit. Table 2-1. R1910 Connectors Reference Designator Label Description J1 AC PWR IN This POWER connector is a multipin connector cabling a usersupplied ac power source (110 VAC, 60 Hz) to the power supply in this unit. J2 RS-232 This 9 pin D-sub female connector is provided for RS-232 communications between the R1910 and a PC.
Repeater Installation Label Description AC 110/220 VAC This POWER connector is a multipin connector cabling a usersupplied ac power source (110/220 VAC, 60 Hz) to the power supply in this unit. +24 VDC 9A BATTERY This connector cables directly to the optional BB42 battery backup unit. LOCAL CONTROL This 9 pin D-sub female connector is provided for RS-232 local communications between the R1920 and a PC. MODEM This 3 pin circular connector is for POTS line interface to the R1920.
Repeater 2-11 Installation STORAGE Environmental conditions during storage and shipment should normally be limited as follows: a. Maximum humidity: 95% (no condensation) b. Temperature range: -40°C to +85°C 2-12 PACKING FOR RESHIPMENT OR STORAGE If the R19X0 must be prepared for reshipment or storage, use the original packing and shipping materials, if possible. Otherwise, the following general instructions should be used for repackaging with commercially available materials: a.
Repeater Operation CHAPTER 3 OPERATION 3-1 INTRODUCTION This chapter provides information for operating the PCS Repeater. The R1910 is designed to work in an indoor environment only, while the R1920/30/40 is designed to work in an outdoor environment. The R1910 and R1920/30/40 are fully compliant with FCC part 24. For the R1910, there are no panel controls other than the power switch. For the R1920/30/40, there are no external controls or indicators.
Repeater 3-2.2 Operation WJ Repeater Control Application The repeater is controlled via either a standard RS-232 interface or via modem interface using a POTS line with the, Windows 95/NT based, Watkins-Johnson Company Repeater Control application. Figure 3-1 shows the control panel of the application. At the top of the panel is a menu bar with two menu items, File and Help.
Repeater Operation current configuration and settings and displays them in the application window. See figure 3.1. When no repeater is detected the application clears the window. 3-2.2.3 Unit Type and Configuration Parameters At the top of the window is displayed the repeater’s model number, serial number, frequency band, modulation, and filter bandwidth parameters. The “Band” parameter is the PCS band setting of the repeater.
Repeater 3-2.2.7 Operation Auto-Leveling Control The Auto-Leveling Control (ALC), when enabled, commands the repeater to maintain the downlink path RF output power level indicated in the “Level” box, +/-2dB, by automatically adjusting the downlink gain as appropriate up to the maximum power of the specific unit. (The valid range for ALC is 0 to 27dBm for the R1910 and 15 to 41.5dBm for the R1920.) When ALC is enabled, control of the downlink path gain is no longer allowed.
Repeater 3-2.2.11 Operation RF ON/OFF The RF ON/OFF button is both a status indicator and a control. The name on the button is the state of RF paths in the repeater. When the button reads “RF On” then both RF paths are powered-up and operational. When the button reads “RF Off” both RF paths are powered-down, making the repeater non-operational. Also, when the RF paths in the repeater are turned-off the button will turn red for emphasis. 3-2.2.
Repeater Operation brings up the MRI Configuration window, which allows repeaters to be added or removed from the MRI unit. 3-2.2.14 Status Bar At the bottom of the panel is a status bar that displays four pieces of information. Beginning in the left most, and largest box, is basic status information about the operation of the application. . The second box from the left is only active when communicating to a MRI unit.
Repeater Operation Battery Voltage 3-7
Repeater Scheduled Maintenance CHAPTER 4 SCHEDULED MAINTENANCE 4-1 INTRODUCTION The WJ PCS Repeaters are designed to operate for extended periods of time with minimum routine maintenance. Inspection and performance tests should be conducted at regular intervals consistent with the facility's normal scheduling and after troubleshooting. No routine adjustments are required.
Repeater Scheduled Maintenance Table 4-1. Scheduled Maintenance Action Index PM Action Paragraph Reference Schedule Cleaning outside of equipment 4-4.1 Every 12 months or when dust is seen on the surface of the equipment. Inspecting for damage or wear 4-4.2 When the unit is not operating properly. 4-4.1 Exterior Cleaning Remove loose dirt accumulated on the outside of the unit with a moist paper towel, cloth, or brush. The brush is good for removing dirt on and around the connectors.
Repeater Scheduled Maintenance The fuse labeled F2 is a 250V/15A, ¼ x 1 ¼ Time-Delay Fuse (Buss MDA-15 or equivalent) on the +24VDC input line. It requires servicing only for repeaters with +24V input, such as battery backup. To avoid the possibility of a large spark occurring as the fuse is replaced, it is recommended that the +24V power source be disconnected while servicing the F2 fuse.
Repeater Scheduled Maintenance Figure 4-1 4-1
Repeater Scheduled Maintenance Figure 4-2 AC Power Switch +24V Fuse On Off AC Circuit Breaker Press to reset.
Repeater Drawings 5-1 Figure 5-1
Repeater Drawings 5-2 Figure 5-2
Repeater Drawings 5-3 Figure 5-3
