User's Manual Part 1

ManualsBrandsAxcera ManualsElectronics2-Watt BRS/EBS Transmitter

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INDEX/APPENDIX

Typical Transmitter Site ..........................................................................

Troubleshooting .....................................................................................

Material Return Procedure/Exchanges ........................................................

Telephone Technical Support ...................................................................

First Aid Procedures ...............................................................................

Proper Packing of Materials......................................................................

Warranty ..............................................................................................

Abbreviations and Acronyms ....................................................................

June 1, 2004

Table of Contents

INTRODUCTION

SYSTEM

Unpacking/Installation ............................................................................

System Description ................................................................................

Specifications .......................................................................................

System Block Diagram and Interconnect .................................................

Front Panel ...........................................................................................

Rear Panel ............................................................................................

OPERATION

Initial Turn On .......................................................................................

Status Screens .....................................................................................

Setup Screens ......................................................................................

MODULES

Module Replacement

How to replace a module .........................................................................

Backplane Board

Description ...........................................................................................

Modulator Module (optional)

Description ...........................................................................................

Power Supply Module

Description ...........................................................................................

Power Amplifier Module

Description ...........................................................................................

LO/Upconverter Module

Description ...........................................................................................

If Processor Module

Description ..........................................................................................

Control And Monitoring Module

Description ...........................................................................................

LCD Display

Description ...........................................................................................

Summary of content (30 pages)

PAGE 1
Table of Contents INTRODUCTION SYSTEM Unpacking/Installation ............................................................................ System Description ................................................................................ Specifications ....................................................................................... System Block Diagram and Interconnect ................................................. Front Panel .......................................................................
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INTRODUCTION The 5720 series product line is designed with the user in mind. With the implementation of modular component technology, it is no longer necessary to perform component level repairs at the site. By simply replacing an entire module the unit is quickly ready to return to normal operation. The unique hinged front panel eliminates the need to remove the unit from the cabinet for routine inspection and maintenance.
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SYSTEM Unpacking Axcera certifies that upon leaving our facility all equipment was undamaged and in proper working order. It is imperative that all packages be inspected immediately when received to verify that no damage occurred in transit to the site. · Inspect all packages for exterior damage and make note of any dents, broken seals, or other indications of improper handling. · Carefully open each package and inspect the contents for damage.
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· Is the building structure where the equipment is to be placed properly prepared ? Listed below are systems and specifications that need to be operational prior to installation of transmission equipment.
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System Description 5720 series transmitters are available in various power levels from 2.5 to 100 watts average power or 10 to 230 watts peak analog. Units can be factory set to a specific channel in the 2076-2700 MHz range. QAM signals up to M=256 as well as NTSC and PAL modulation can be processed by the unit. A center frequency of either 44 MHz or 36 MHz can be set at the factory prior to shipment. All 5720 series transmitters are compatible with SCADA .
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Digital / Analog MMDS Transmitter Compatible with digital and analog modulation including 256 QAM, NTSC, and PAL Broad power range of 2.
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Modular design simplifies installation, field service, and system upgrades. High Efficiency, Broadband Amplifiers Axcera has selected the newest, most efficient GaAsFETs for the 5720 series. Redundant amplifier modules enable the system to stay on the air in the event of a failure. Amplifier modules are hot-replaceable so they can be removed and installed while the system is operating. Amplifiers are tuned broadband to simplify repair and reduce spares inventory.
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5720 Series Specifications Subject to change without notice RF Performance RF Output Power (PEP Watts) 5721 20 RF Output Power Digital (Avg. Watts) 2.5 RF Output Power Analog (Pk Sync Watts with -15dB Aural) 10 5722 40 5723 50 5724 70 5725 120 5726 220 5727 400 5 10 15 25 50 100 20 30 50 100 160 280 RF Output Frequency .............................. Any 6, 7, or 8 MHz channel, 2076-2700 MHz RF Output Impedance ............................. 50 Ohms Frequency Translation Stability2 ...
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5720 Series Digital / Analog MMDS Transmitter Specifications Subject to change without notice 5721 5722 5723 5724 5725 5726 5727 Inputs / Connectors ................... Video Input / BNC; Baseband Audio Input / Screw Terminals; Composite Audio Input / BNC; Visual IF Input / BNC; Aural IF Input / BNC; IF Input / BNC; 10 MHz Ref Input / BNC; IF CW Input / BNC; Remote Interface / D; Control Interface / D; SCADA / RJ45 (2 connectors) Outputs / Connectors .................
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Front Panel The front panel of the 5720 is hinged for easy access to the modules inside. Two latches secure the panel shut. When opened, the panel provides easy access to the modules inside the unit. A liquid crystal display (LCD), displays pertinent details about the transmitter as detailed below. Various screens and functions are accessible through use of the five soft touch keys below the LCD. Two LED’s indicate operating status of the unit. 5720 Messages Message Description software version 2.
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output power OK OK output power fault OUTPUT POWER OK POTENCIA OK OUTPUT POWER FAULT POT SAIDA FALLA POTENCIA FALHA POT SAIDA PLL locked PLL ENGATADO PLL fault power supply OK power supply fault PLL LOCKED PLL FAULT POWER SUPPLY OK POWER SUPPLY FAULT external amplifier moduleOK external amplifier module fault FUENTE ALI CONFORME FALLA FUENTE ALI EXT. AMP.
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Rear Panel The rear panel of the 5720 features remote control inputs and outputs, visual and aural IF inputs and outputs, visual and aural analog inputs, 10MHz reference input, and access to SCADA communications if that is a selected option. AC connections as well as a cooling fan and circuit breaker are also located on the back of the unit as pictured below.
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Connections for an External Amplifier (from amplifier) J3 D Connector (to transmitter) J12-D Connector Description J3-4 Remote forward power J12-35 J3-6 Remote reflected power J12-37 J3-8 Operate J12-13 J3-5 Ground (typical) J12-36 J3-9 Amplifier interlock return J12-18 J3-10 J3-16 J3-18 J3-25 J3-20 J3-24 Amplifier interlock for ABS (if used) Remote overtemperature J12-33 J12-24 Amplifier fault Ground (typical) Power Supply Fault Encoding gating pulse 14 J12-30 J12-26 J12-17
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Rear Panel Loop Thrus Two rear panel loop thrus are located on the back of the transmitter. The Visual IF O/P J4 is connected to the Visual IF Input J5, and the Aural IF Input J7 is connected to the Aural IF input J6 if no scrambling or encoding is used. Connections For Scientific Atlanta Scrambling 1. Connect baseband video output of the SA scrambler to J2 (video input) of the transmitter. 2. Connect visual IF output J4 of the transmitter to visual IF input of the SA scrambler. 3.
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5700 Series Transmitter Connections For Pac-Mono (Cypeherpoint) Scrambling Data Channel Data Encoder -Wire the data channel audio source to the data encoder rear panel AUDIO INPUT J7. -Connect the DATA/AUDIO OUT to the transmitters composite audio input J3. -Connect the data channel video source to the video input J2 of the data channels transmitter. Non-Data Channels -Connect video source to the Video Processor In connector and the matching Video Processor Out connector to J2 Video Input of transmitter.
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Notice the top line is Peak-of-Sync and two centimeters down from the top line is Blanking. Also, one centimeter up from the bottom line is “White”. These three points will be referred to later in this procedure. To obtain this pattern it is necessary to first setup the Pac-Mono equipment per their procedure. Connect the “five step” video from the signal generator to the input of the Pac-mono card. The output of the Pac-Mono equipment is then connected to the video input of the ADC transmitter.
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OPERATION Initial Turn On Once all connections have been made and the unit has been installed, the process of turning on the equipment can begin. First verify that AC power is present and connected to each transmitter. Verify all cables are properly connected and the correct type. Once all of these things are done, the unit is ready to be turned on following the procedures below. Turn on the main AC power source that supplies the entire system. Turn on the AC circuit breaker (CB1) on the back of each unit.
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Status Screens Normal Operation Fault Condition (flash- ing) TRANSMITTER STATUS IF INPUT FAULT TRANSMITTER STATUS IF PRESENT STB SYS PRV NXT or STB SYS PRV Additional messages are as follows: IF PRESENT OUTPUT POWER OK PLL LOCKED EXT REF PRESENT AMP MODULE OK TEMP OK PWR SUPPLY OK PEAK VS AVG OK IF INPUT FAULT OUTPUT POWER FAULT PLL FAULT EXT REF FAULT AMP MODULE FAULT TEMP FAULT POWER SUPPLY FAULT PK VS AVG FAULT If an external amplifier is present: EXT AMP MODULE OK EXT AMP TEMP OK EXT PWR S
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Setup Screens TRANSMITTER STATUS IF INPUT FAULT STB SYS PRV Accessing the setup screens is accomplished by holding down the second button for five seconds. NXT MODEL SETUP MODEL :5722 INC DEC PRV NXT The 5720 series transmitter provides the user with various setup options. First select the appropriate model. (5722, 5723, 5724, 5725, 5726, 5727) NXT Select the proper region as follows: Region 0 = United States Region 1 = South America REGION SETUP REGION: 2 INC DEC PRV RF channel setup menu.
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MODULES Module Replacement Module replacement on 5720 series products is a relatively simple process. All modules plug directly into the backplane board except the power supply and power amplifier module which plug into a blind mating connector. A detailed description of how to replace each module is addressed in the section to follow. Turn the grip lock connectors on the module counterclockwise until the module releases Gently pull the module from the unit.
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Backplane Board The backplane assembly provides module to module connection with devices being directly plugged in. Connections on the backplane also interface with other devices to establish remote control and command functions. The schematic on the next page shows connections from the backplane board the rest of the backplane system. front and rear view of the backplane board.
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Backplane Board Connections
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Modulator Module The modulator can be used with an external 4.5MHz aural input instead of the normal bal anced and composite inputs. The 4.5 MHz is applied to the transmitter using the composite audio input connector. There are three jumpers on the modulator module that will need to be moved to convert to this input. Conversion procedure: Remove modulator module. Move the jumper on J4 so that it connects pins 1 and 2. Move the jumper on J6 so that it connects pins 1 and 2.
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Dip Switch Settings The switch settings on the modulator board for an NTSC system are as follows: Visual Carrier IF Channel Freq SW2 SW9 SW10 SW12 SW8 SW6 SW7 45.75 45.75 +10KHz 45.75 -10KHz CF CF -10KHz CF +10KHz 1100 0111 0001 0001 0111 1111 1000 1100 0111 0001 0001 1111 0000 0000 1100 0111 0001 0001 0111 1111 0000 38.9 38.9 + 1/2 line 38.9 - 1/2 line CF CF -1/2 line CF +1/2 line 1100 0100 0000 0110 1000 0100 0000 1100 0100 0000 0110 1000 0100 0101 1100 0100 0000 0110 1000 0011 1011 38.
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Jumpers Audio Jumpers for Modulator Module J2 Preemphasis enable 1,2 1,2 J4 Floating / Grounded composite (gnd enabled) 1,2 J5 4.5 MHz subcarrier int/ext (internal enabled) Ext 4.
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Video Jumpers J9 Group delay enable 2,3 J11 Video loss fault enable 1,2 27
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Power Supply Module The power supply module contains a 530 watt switching power supply and an eight position terminal block. It is configured for three output voltages +12V, -12V, and a main output power of 10.8V. The supply is power factor corrected to .98 for optimum efficiency and decrease in energy consumption. For safety purposes all outputs are over voltage and over current protected.
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Back view of the Power Supply Module 29
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Power Amplifier Module The power amplifier module has a female SMA RF input connector on the front of the mod ule. The RF I/P signal applied to this connector is amplified and transmitted from the back of the module through a female N connector. There are several power configurations avail able with or without feed forward linearization. Power level ratings vary depending on the type of modulation used. In systems using QAM, power is rated in terms of average power.