Microwave Radio Communications DAR Plus Operator'S Manual Download

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Transmitter Overview

System Overview

1-3

DAR PLUS Operator’s Guide

400468-1

Rev. C

1.3

Transmitter Overview

Transmitter configurations can consist of either an internal or external digital 19.39 Mbps
modulator (QM2), an FM NTSC modulator, or an external modem or multiplexer such as
the MRC Variable Rate Modem or QM4 Modem. See

Figure 1-1

for the transmitter block

diagram.

Figure 1-1

Transmitter Block Diagram

19.4 Mbps

MODEM

ATSC

(19.39 Mbps)

DS1

(1.544 Mbps)

SERVICE

CHAN.

(9.6 kbps)

ALARMS

(4 Alarms)

70 MHz

IRM

UPCONVERTER

MODULATOR

NTSC

AUDIO

MODULATOR

AUDIO

(4 Chan.)

RF SECTION

DAR Plus Cabinet

External Modems

LIMITER

AMP

PLUG-IN

MODULES

70 MHz

DAR_Plus_Tx_BLK_1osc

Note 1 - Bit Rate and band width dependant.
Contact MRC for available applications.

LOCAL

OSCILLATOR

6 GHz

12 GHz

MULTIPLIER

AMP

QM2

VARIABLE

RATE

MODEM

(Note 1)

DS3, E3, DVB-T

DVB-ASI

RS-422,

LVDS Parallel

DVB-SPE

19.4 Mbps

MODEM

ATSC

(19.39 Mbps)

DS1

(1.544 Mbps)

SERVICE

CHAN.

(9.6 kbps)

ALARMS

(4 Alarms)

QM2

70 MHz

QM4

45 Mbps

DS3

Summary of Contents for DAR Plus

Page 1: ...ppendix A System Connections Table of Contents Section 1 System Overview Document 400468 1 Revision C September 2003 Section 2 System Installation Section 3 Operating Controls Section 4 Summary Alarms Appendix B Modules Appendix C Frequency Settings Software Release 1 0 ...

Page 2: ...d therein except to the extent rights are expressly granted to others The foregoing does not apply to vendor proprietary parts To allow for the introduction of design improvements specifications are subject to change without notice 2003 Microwave Radio Communications Printed in the U S A August 2003 Revision ECO Date A March 2002 B 3143 2 August 2003 C 3203 2 September 2003 Microwave Radio Communi...

Page 3: ...g pin This plug fits into a standard grounded power outlet If you are unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the grounded plug Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by other equipment items Pay particular attention to cords at pl...

Page 4: ...Notes ...

Page 5: ...itter 1 7 1 4 3 Receiver 1 7 1 4 4 Frequency Response 1 7 1 4 5 Analog Radio Performance 1 7 1 4 6 Digital Specifications Optional QM2 Modem 1 7 1 4 7 Electrical 1 8 1 4 8 Environment 1 8 1 4 9 Interconnection 1 8 1 4 10 DIGITAL Specifications Summary 1 9 1 4 11 Analog Specifications Summary 1 9 2 System Installation 2 1 2 1 Unpacking and Handling 2 1 2 1 1 Inspection 2 1 2 1 2 Damage in Shipment ...

Page 6: ...r Menus 3 8 Figure 3 8 Receiver Menu System 3 8 3 3 1 Receiver Main Menu 3 9 Figure 3 9 Receiver Main Menu 3 9 3 3 2 Receiver Power Supply Menu 3 10 Figure 3 10 Receiver Power Supply Menu 3 10 3 3 3 Receiver Radio Menu 3 11 Figure 3 11 Receiver Radio Menu 3 11 3 3 4 Receiver Analog Channel Menu 3 12 Figure 3 12 Receiver Analog Channel Menu 3 12 3 3 5 Receiver Digital Menu 3 13 Figure 3 13 Receiver...

Page 7: ...Summary Alarm A 4 Table A 5 Audio Channels A 4 B Modules B 1 B 1 DAR Plus Transmitter Modules B 2 Figure B 1 Transmitter Top View Front Door Open B 2 B 2 DAR Plus Receiver Modules B 3 Figure B 2 Receiver Top View Front Door Open B 3 B 3 Tx Audio Modulator Motherboard 900426 B 4 Table B 1 Tx Audio Modulator Motherboard Adjustments 900426 B 4 Figure B 3 Tx Audio Modulator Adjustments 900426 B 4 B 4 ...

Page 8: ...905764 B 10 Table B 8 IF Amp B 10 Figure B 9 IF Amp 905764 B 10 B 10 IF Limiter Amp 905720 B 11 Table B 9 IF Limiter Adjustments B 11 Table B 10 IF Limiter Jumper Configurations B 11 Figure B 10 IF Limiter Amp B 11 C Frequency Settings C 1 Figure C 1 Synthesizer Switch Locations C 1 Table C 1 6 GHz Oscillator Switch Settings C 2 Table C 2 12 13 GHz Oscillator Switch Settings C 2 ...

Page 9: ... the unit and verify normal operation Troubleshoot common system faults Terms and Conventions For commonly used abbreviations and acronyms see the Glossary on page x Related Documents QM2 Modem Operator s Guide Instructions for installing and configuring the QM2 Modem QM2 Intenal Modem Component Drawing and Schematics QM4 Modem Operator s Guide Instructions for installing and configuring the QM4 M...

Page 10: ...12 and 13 GHz bands Glossary This section describes commonly used acronyms and abbreviations used in telecommunication and those specific to Microwave Radio Communications Term Definition ØLK Phase Lock 1RU 1 Rack Unit height A C Alarm and Control ADPCM Adaptive Differential Pulse Code Modulation AFC Automatic Frequency Control AGC Automatic Gain Control AIS Alarm Indication Signal all one s AMI A...

Page 11: ...mpulse Response FLR MRC s model designation for frequency modulated FM remodulating radio systems from 2 to 15 GHz FLR2 is the 2 GHz band version FLR4 the 4 GHz band version etc FPGA Field Programmable Gate Array GND Ground H W Hardware HDB3 High Density Bipolar 3 line code format for traffic data HPF High Pass Filter I In phase ID Identification IF Intermediate Frequency IRE 1 Institute of Radio ...

Page 12: ...el RF Power from the transmitter Rx Receiver S W Software SC Service Channel Setpt Set point Simplex A channel capable of transmitting information in only one direction STDBY Standby Subcarrier An electromagnetic signal that is used as a medium for placing an information channel above another information channel SYNTH Synthesizer T1 1 544 Mbps traffic rate T3 45 Mbps traffic rate Tx Transmitter VC...

Page 13: ...r internal or external ATSC HDTV transport using MRC s QM2 modems In addition the DAR Plus used with the MRC Variable Rate Modem MRC VRM provides several transport options for transmit and receive ends 1 1 1 Modulator Demodulator Options Internal modem cards or external modem shelf for added flexibility in placement of digital and RF circuits FMT FMR Analog 525 or 625 line video with four audio su...

Page 14: ...cs through front panel 1 2 1 Options Analog FMT FMR 70 MHz IF 4 audio subcarriers high power output options Digital Internal or external modem QM2 19 39 mbps modulator demodulator external QM4 modulator demodulator AC or DC conversion 1 2 2 Protection Options Hot standby protection for transmit and receive ends Receive diversity Receive diversity hitless QM2 internal only 1 2 3 Digital or Analog M...

Page 15: ...ck Diagram 19 4 Mbps MODEM ATSC 19 39 Mbps DS1 1 544 Mbps SERVICE CHAN 9 6 kbps ALARMS 4 Alarms 70 MHz 70 MHz IRM UPCONVERTER FM MODULATOR NTSC AUDIO MODULATOR AUDIO 4 Chan RF SECTION DAR Plus Cabinet External Modems R L LIMITER AMP PLUG IN MODULES 70 MHz DAR_Plus_Tx_BLK_1osc Note 1 Bit Rate and band width dependant Contact MRC for available applications LOCAL OSCILLATOR X2 6 GHz 12 GHz MULTIPLIER...

Page 16: ...on within the chassis For a description of the rear panel connections see Appendix A System Connections Figure 1 2 Transmitter Chassis Layout and Interconnection X2 MULTIPLIER D FM MODULATOR A AUDIO MODULATOR A UP UPCONTER LIMITER IF AMP POWER AMP TRAY I F TO ANTENNA External Modulator AC INPUT CONTROL MODULE QM2 ATSC MODEM OPTIONAL FUTURE DARPLUS_TX_CAB_BLK FRONT PANEL X2 MULTIPLIER 12 GHz POWER ...

Page 17: ... 1 3 Receiver Block Diagram 70 MHz 70 MHz LNC FM Demod NTSC NTSC Video AUDIO Demod AUDIO 4 Chan RF SECTION DAR Plus Cabinet R L BPF LIMITER PLUG IN MODULES 70 MHz 6 GHz QM2 Demod VARIABLE RATE MODEM Note 1 DS3 E3 DVB T DVB ASI RS 422 LVDS Parallel DVB SPE 19 4 Mbps ATSC 19 39 Mbps DS1 1 544 Mbps SERVICE CHAN 9 6 kbps ALARMS 4 Alarms QM2 Demod 70 MHz QM4 Demod 45 Mbps DS3 19 4 Mbps QM2 Demod ATSC 1...

Page 18: ...tion within the chassis For a description of the rear panel connections see Appendix A System Connections Figure 1 4 Receiver Chassis Layout and Interconnection FM DEMODULA T OR Analog AUDIO DEMODULATOR Analog AC or DC INPUT CONTROL MODULE ATSC DEMODULATOR OPTIONAL SPARE RX_CAB_BLK FRONT PANEL LCD DISPLAY KEYPAD POWER SUPPLY BACKPLANE CABINET X2 MULTIPLIER 12 MHz LNC IF AMP IF FILTER LOCAL OSCILLA...

Page 19: ...ations Summary VIDEO PERFORMANCE optional FMT Back to Back with CCIR Emphasis 1 4 4 Frequency Response 10 kHz to 4 5 MHz 525 line 0 25 dB 10 kHz to 5 0 MHz 625 line 0 25 dB 5 MHz to 8 MHz Baseband Output 0 5 dB Field Tilt 3 IRE max Line Tilt 0 5 IRE max Baseband Chroma Delay 20 nS max Baseband Chroma Gain 2 IRE max Differential Phase 0 5 max Differential Gain 2 max Signal to Noise Ratio Meets or e...

Page 20: ...atts typical Power Supply Voltages 110 240 Vac 24 48 Vdc 1 4 8 Environment Operating Temperature Range 0 to 50 C Relative Humidity 0 to 95 non condensing Physical Height 3 rack units 5 25 13 34 cm Depth 15 0 38 1 cm Weight 22 lbs 10 kg 1 4 9 Interconnection RF Connections 1 71 to 4 90 GHz Type N female connector 5 925 to 7 125 GHz TypeWR137 CPR top of rack 7 10 to 8 50 GHz Type WR112 CPR top of ra...

Page 21: ...m Signal Range Power1 Figure2 hold4 Gain2 Noise4 Model GHz dBm dB dBm dB dBm DAR 2 1 7 to 2 7 37 2 5 86 123 75 DAR 4 3 3 to 4 9 33 3 5 85 118 73 DAR 6 5 9 to 7 1 33 3 5 85 118 73 DAR 6HP 5 9 to 7 1 37 3 5 85 122 73 DAR 7 7 1 to 8 5 30 3 5 85 115 73 DAR 7HP 7 1 to 8 5 34 3 5 85 119 70 DAR 12 10 5 to 13 2 30 4 0 84 114 70 DAR 12HP 10 5 to 13 2 33 4 0 84 117 70 DAR 15 14 4 to 15 35 30 4 0 84 114 70 N...

Page 22: ...Specifications System Overview 1 10 DAR PLUS Operator s Guide 400468 1 Rev C ...

Page 23: ...r any packing material until the mechanical inspection has been satisfactorily completed This material must be available in the event that a damage claim needs to be filed with the shipping carrier 2 1 1 Inspection Inspect the equipment for any shipping damage Check that the equipment is clean and that no cables or connectors are broken damaged or loose Note At the time of inspection DO NOT make a...

Page 24: ... front and rear of the equipment rack Figure 2 1 Allow a minimum of 18 inches 45 72 mm clearance at the rear of the equipment rack To service and maintain the equipment allow a minimum of 36 inches of clearance in front of the equipment rack Warning Reduced Air Flow Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is no...

Page 25: ...he connection of the equipment to the supply circuit and the effect that overloading of circuits could have on over current protection and supply wiring Appropriate consideration of equipment nameplate ratings should be used when addressing this concern 4 Check that the rack mounting rails are sufficiently rigid to support the rack and equipment Warning Mechanical Overloading Mounting of equipment...

Page 26: ... and bolts securing it in place Refer to Table 2 1 for equipment rack specifications Table 2 1 Equipment Rack Specifications Step 2 Remove the rack from its crate by lifting it off the mounting bolts and place it near its final mounting location After the rack has been raised to a vertical position remove the shipping support brackets the rack side rails Step 3 A template can be used for marking t...

Page 27: ...at 1 each per bolt Anchors 3 8 16 x 2 Caulking Anchors Diamond type 03060 Note These anchors require 3 4 holes On wood floors use 3 8 x 1 1 2 lag bolts with lock and flat washers Step 5 Secure the rack to the adjacent racks and existing superstructure where applicable Fasten the rack s top braces to the superstructure using J bolts If there is not an existing superstructure the top of the rack sho...

Page 28: ...Equipment Rack Installation System Installation 2 6 DAR Plus Operator s Guide 400468 1 Rev C Figure 2 4 Equipment Rack Front View RACK_FR 84 00 MOUNTING HOLES ...

Page 29: ... 2 6 Power Requirements and Fuse Specifications 2 6 1 Fuse Specifications Use the following fuse type 120 240 Volts 50 60 Hz TA 250 Volts Caution The DAR Plus radios use either double or neutral fusing depending on the model Use care when interchanging fuses between DAR Plus radios Use Table 2 2 to determine the correct fuse Table 2 2 describes the fuse specifications and power specifications The ...

Page 30: ...Power Requirements and Fuse Specifications System Installation 2 8 DAR Plus Operator s Guide 400468 1 Rev C ...

Page 31: ...lly reports current system functions and errors messages 3 1 1 Common Keypad Functions Figure 3 1 shows the common keypad functions for selecting menus Figure 3 1 Keypad Functions Note If no keys have been pressed within 3 minutes the LCD back light turns off and returns to the Main Menu Pressing any key re lights the LCD display MAIN RESET RADIO POWER CONTRAST DIGITAL ANALOG ADJUSTMENT CHANNEL ME...

Page 32: ... page 5 9 Press Main Menu to enter the Configuration menus Figure 5 9 on page 5 9 Set Internal or External Modulator Figure 5 11 on page 5 10 Displays IF Level Data Synchronization Oscillator Status Bit Error Rate T1 Status Figure 3 7 on page 3 7 Displays status for Sub Carrier IF and IF Squelch Figure 3 6 on page 3 6 Displays current minimum and maximum power output power Phase Lock Loop status a...

Page 33: ...f the stack moved to the top of the window Navigation to the following menus PWR Tx Power Supply Menu Figure 3 4 on page 3 4 RAD Transmitter Radio Menu Figure 3 5 on page 3 5 ANL Transmitter Analog Mode Alarm States Menu Figure 3 6 on page 3 6 DIG Transmitter Digital Alarm State Status Menu Figure 3 7 on page 3 7 Figure 3 3 Transmitter Main Menu DAR Plus TX D TXPWR 34 dBm PWR Version 1 0 DIG RAD A...

Page 34: ...15 Vdc current minimum and maximum readings 15Vdc current minimum and maximum readings Analog or digital power amplifier current minimum and maximum readings depending on radio configuration Figure 3 4 Tx Power Supply Menu POWER SUPPLIES CURR MIN MAX 15 14 8 13 9 15 3 15 15 0 14 9 15 3 5 4 98 4 98 5 04 R S T CURRENT VOLTAGE READING MINIMUM VOLTAGE PARAMETER MAXIMUM VOLTAGE PARAMETER D TXP 12 0 12 ...

Page 35: ...mmary Alarm is reported D A PLL Digital D or Analog A transmitter oscillator phase lock loop in locked LCK or unlocked UNLCK states The UNLCK state reports a summary alarm Current minimum and maximum output power for both digital or analog mode Figure 3 5 Transmitter Radio Menu RADIO D THS 19dBm D PLL LCK PWR CURR MIN MAX D 27dBm 26dBm 27dBm R S T THRESHOLD DIGITAL ANALOG OSCILLATOR PHASE LOCK LOO...

Page 36: ...Phase Lock Loop LOCKED or UNLOCKED states SUB CARRIER Sub Carrier OK or LOST states OK is normal and LOST reports an alarm condition CARRIER INS Carrier Insert displaying OK or LOST states OK is normal and LOST reports an alarm condition Figure 3 6 Transmitter Analog Mode Alarm States Menu ANALOG MODE FMT PLL LOCKED SUB CARRIER OK CARRIER INS OK PHASE LOCK LOOP LOCKED OK Normal or LOST Alarm OK or...

Page 37: ... Input OK or FAULTS T1 A1s T1 All 1s Inserted All 1s Inserted or OK T1 LOS T1 Loss of Signal OK or FAULTS External Modem Modem Sum INACTIVE or ACTIVE Figure 3 7 Transmitter Digital Alarm State Status Menu MODEM STATUS A1S OK LEVEL OK PLL LOCKED LOS INPUT OK T1 A1S OK T1 LOS OK LOSS OF SIGNAL UNLOCKED LOCKED PHASE LOCK LOOP T1 ALL 1s INSERTED ALL 1s INSERTED OK OK T1 LOSS OF SIGNAL OK OK LEVEL OK o...

Page 38: ...g Threshold and Modem Type Internal or External Figure 5 6 on page 5 6 Displays Internal or External Modem Status Figure 3 13 on page 3 13 Choose Transmitter TX or Receiver RX Configuration Figure 5 3 on page 5 3 Press Main Menu to enter the Configuration menus Figure 5 2 on page 5 3 Displays Analog Status Figure 3 12 on page 3 12 Displays Receive Signal Level RSL and Fade Margin for both analog a...

Page 39: ...he stack moved to the top of the window Navigation to the following menus PWR Receiver Power Supply Menu Figure 3 10 on page 3 10 RAD Receiver Radio Menu Figure 3 11 on page 3 11 A Receiver Analog Channel Menu Figure 3 12 on page 3 12 D Receiver Digital Alarm State Status Menu Figure 3 13 on page 3 13 Figure 3 9 Receiver Main Menu DAR Plus RX D RSL MARG 69 dBm 13dB PWR Version 1 0 D RAD A ALARM WI...

Page 40: ...15Vdc or 5Vdc current voltage readings Note that voltage readings that are out of the minimum and maximum ranges are displayed in reverse video Press RST to reset the minimum and maximum readings Figure 3 10 Receiver Power Supply Menu POWER SUPPLIES CURR MIN MAX 15 14 8 13 9 15 3 15 15 0 14 9 15 3 5 6 98 4 98 5 04 R S T CURRENT MINIMUM VOLTAGE MAXIMUM VOLTAGE VOLTAGE READING The RESET key resets t...

Page 41: ...reverse video Analog or digital oscillator Phase Lock Loop PLL status showing Locked LCK or Unlocked UNLCK states Note the Unlocked state display a summary alarm on the Front Panel See Section 3 3 1 Receiver Main Menu on page 3 9 and Section 4 Summary Alarms on page 4 1 Figure 3 11 Receiver Radio Menu RADIO D PLL LCK LCK CURR MIN MAX D RSL 92dBm 93dBm 92dBm D MAR 32dBm 33dBm 32dBm R S T RESET Curr...

Page 42: ...u The Receiver Analog Menu displays the following information about the analog signals Sub carrier displays as OK or UNLOCK states IF Squelch displays as FORCED or OFF states PILOT OK Figure 3 12 Receiver Analog Channel Menu ANALOG MODE SUB CARRIER OK IF SQUELCH FORCED PILOT OK Sub Carrier State IF Squelch FORCED and OFF OK or UNLOCK ...

Page 43: ... Phase Lock Loop in locked LOCKED or unlocked UNLOCKED states BER Bit Error Rate OK or 10 3 This condition reports a summary on the front panel RXT1 Receiver T1 Wayside Channel OK or no T1 External Modem ACTIVE or INACTIVE Figure 3 13 Receiver Digital Alarm State Status Menu MODEM STATUS IF LEVEL mdm if LOW SYNCS LOST SYNCS PLL LOCKED BER NO ERRORS RXT1 no t1 T1 Wayside Channel BIT ERROR RATE NO E...

Page 44: ...Receiver Menus Operating Controls 3 14 DAR PLus Operator s Guide 400468 1 Rev C Rev C SW Release 1 0 ...

Page 45: ...o the backplane using a ribbon cable The backplane acts as a connection interface to route alarm information to the Control Module Figure 4 1 shows how diagnostic information is routed to the Control Module from the various system components Figure 4 1 DAR Plus Diagnostic Interconnection AUDIO BOARD VIDEO BOARD MODULATOR or DEMODULATOR I O ALARMS 30 PIN RIBBON CABLE BACKPLANE PLUG IN MODULES FRONT...

Page 46: ...hin the Alarm Message Window See Figure 4 2 In addition when a reading exceeds or drops outside of the system specification the report menu hi light the reading as shown in Figure 4 2 Figure 4 2 Receiver Main Screen with Alarm Window 4 2 1 LED Definitions Three LEDs are located on the front panel as shown in Figure 4 3 The PWR LED colored green indicates that power is applied to the unit The DIGIT...

Page 47: ...lifiers Table 4 1 Transmitter Power Supply Alarms 4 3 2 Transmitter Digital RF Shelf Alarms Table 4 2 lists alarms that affect the digital RF shelf Table 4 2 Transmitter Digital RF Shelf Alarms Alarm Message Analog LED Illuminate Digital LED Illuminate System Action Possible Cause PWR 15 FLT Disables both Digital and Analog Power Amps 15 Volts outside operating parameters Source Power Supply PWR 1...

Page 48: ...PLL UNLOK Disables Analog Power Amp Analog Local Oscillator PLL Loss of lock detect Source Analog Local Oscillator PWR AN 12V FLT None 12 Volts Analog Power Amp supply operating outside parameters Source Analog Power Amp AN TX PWR ALRM None Analog Power Amplifier output power is low Source Power Amp AN CARR INS ON None Analog Carrier Insert Failure Source Limiter AN SUBARR FLT None Analog Sub Carr...

Page 49: ...uminated System Action Possible Cause PWR 15 FLT None 15 Volts outside operating parameters Source Power Supply PWR 15V FLT None 15 Volts outside operating parameters Source Power Supply PWR 5V FLT None 5 Volts outside operating parameters Source Power Supply Alarm Message Analog LED Illuminated Digital LED Illuminated System Action Possible Cause DG PLL UNLOK None Digital Local Oscillator PLL Los...

Page 50: ...smitter or receiver Section 4 5 1 DAR Plus Transmitter Alarm Reference on page 4 7 Section Table 4 7 DAR Plus Transmitter Alarm Reference Table on page 4 7 Alarm Message Analog LED Illuminated Digital LED Illuminated System Action Possible Cause AN PLL UNLOK None Analog Local Oscillator PLL Loss of lock detect Source Analog Local Oscillator AN RSL ALRM None Analog Receive Signal Level is below Fad...

Page 51: ...G FUNCTIONS A 5 FMT_LOK FMT PLL LOCKED UNLOCKED 6 IF_ALRM CARRIER INS OK LOST 17 SC_ALRM SUB CARRIER LOCKED UNLOCKED 11 Internal Modem PILOT ANALOG PILOT OK MISSING RF FUNCTIONS RAD 7 IF_LOK NU NU 20 MW_LOK A D PLL LCK UNLCK MODEM FUNCTIONS D 11 External Modem MDMA_1 DIGITAL A1S OK a1s input 23 MDMA_2 MDM IF LEVEL OK LEVEL LOW 10 MDMA_3 PLL LOCKED UNLOCKED 22 MDMA_4 LOS INPUT OK no input 9 MDMA_5 ...

Page 52: ...NALOG FUNCTIONS A RECEIVER 5 FMT_LOK 6 IF_ALRM IF SQUELCH OFF FORCED 17 SC_ALRM SUBCARRIER OK UNLOCKED loss 11 Internal Modem PILOT ANALOG PILOT OK MISSING RF FUNCTIONS RAD 7 IF_LOK 20 MW_LOK A D PLL LCK UNLCK MODEM FUNCTIONS D 11 External Modem MDMA_1 DIGITAL RXA1S OK a1sin 23 MDMA_2 SYNCS OK LOST SYNCS 10 MDMA_3 PLL LOCKED UNLOCKED 22 MDMA_4 BER NO ERRORS BER 10 3 9 MDMA_5 RXT1 no t1 OK 21 MDMA_...

Page 53: ...or the transmitter and receiver Figure A 1 Rear Panel Connectors 1 2 3 4 SUMMARY ALARM AUDIO CHANNELS 1 4 DATA SITE MANAGEMENT ALARM IF HDTV DS 1 Table A 4 on page A 4 Table A 5 on page A 4 Table A 2 on page A 2 Table A 1 on page A 2 Table A 3 on page A 3 BASEBAND VIDEO AC FAN ANALOG RF OUTPUT AC or DC POWER No Connection or DIGITAL ...

Page 54: ...ut is grounded It causes the associated Form C relay to activate Pin Name Description 1 NC 2 NC 3 SVC DATA I O 9600 Kbps Baud Data Service Channel 4 Pin 6 5 Ground 6 Pin 4 7 Pin 8 8 Pin 7 9 NC Pin Tx Input Rx Output Description 1 SM C IN SM _C_NO 2 GND SM_C_COM 3 SM_B_NC 4 SM_A_IN SM_A_NO 5 GND SM_A_COM 6 SM_C_NC 7 SM_B_IN SM_B_NO 8 GND SM_B_COM 9 SM_A_NC ...

Page 55: ...c A D 15 5V 16 SUM_ALRM_D DAR Plus Analog Digital Summary 17 SC_ALRM 18 RFIF_A NU 19 RFIF_D AGC V 20 MW_LOK 21 MDMA_6 22 MDMA_4 23 MDMA_2 24 PSON _A 25 PSON _D Power Supply Voltage Control Line Legend NU Not Used A D Analog Digital PLL Phase Lock Loop AGC Automatic Gain Control FMT Model name for Transmitter Video Modulator For additional alarm referencing refer to the following reference tables D...

Page 56: ...RM_COMM NU 5 ANA_SUM_ALRM_N C NU 6 DIG_SUM_ALRM_N O 7 NC 8 NC 9 ANA_SUM_ALRM_N C NU Pin Name Description Audio Channel 1 1 AF1A 600 ohm 8 dBm I O 2 GND 3 AF1B 600 ohm 8 dBm I O Audio Channel 2 1 AF2A 600 ohm 8 dBm I O 2 GND 3 AF2B 600 ohm 8 dBm I O Audio Channel 3 1 AF3A 600 ohm 8 dBm I O 2 GND 3 AF3B 600 ohm 8 dBm I O Audio Channel 4 1 AF4A 600 ohm 8 dBm I O 2 GND 3 AF4B 600 ohm 8 dBm I O ...

Page 57: ...module adjustments indicators and test points The following modules are included Section B 3 Tx Audio Modulator Motherboard 900426 on page B 4 Section B 4 Audio Subcarrier Generator 900100 on page B 5 Section B 5 Rx Video Demodulator 906556 on page B 6 Section B 6 Rx Audio Motherboard 900414 on page B 7 Section B 7 Rx Audio Subcarrier Demodulator 900172 on page B 8 Section B 8 Rx IF Filter Equaliz...

Page 58: ...er Modules Figure B 1 Transmitter Top View Front Door Open OSCILLATOR BACKPLANE IF LIMITER AMP POWER AMP MICROCONTROLLER POWER DISTRIBUTION 906572 906542 DISPLAY POWER SUPPLY 906582 906560 906570 905720 POWER AMP 906673 POWER SUPPLY 906529 QM2 MODULATOR 906859 AUDIO MODULATOR 900426 VIDEO MODULATOR 906556 ...

Page 59: ...ceiver Modules Figure B 2 Receiver Top View Front Door Open BACKPLANE POWER DISTRIBUTION 906588 906542 DISPLAY POWER SUPPLY 906582 906560 QM2 DEMODULATOR 90 VIDEO DEMODULATOR 906556 AUDIO DEMODULATOR 90 LNC SPLITTER 906621 LNC 906512 OSCILLATOR 906570 IF FILTER 905560 IF AMP 906587 MICROCONTROLLER ...

Page 60: ...annel 1 Audio Deviation Adjust CR5 Audio 1 Green LED ON is active R36 Channel 2 Audio Deviation Adjust CR6 Audio 2 Green LED ON is active R41 Channel 3 Audio Deviation Adjust CR7 Audio 3 Green LED ON is active R46 Channel 4 Audio Deviation Adjust CR8 Audio 4 Green LED ON is active 900426 1 15 J5 CHANNEL 4 CHANNEL 3 CHANNEL 2 CHANNEL 1 CH 1 CH 2 CH 3 CH 4 CH 1 DEV CH 2 DEV CH 3 DEV CH 4 DEV J5 CR5 ...

Page 61: ...carrier Generator Adjustments 900100 Component Description see Figure 5 3 R24 Subcarrier Output Level Adjust C17 Peaking Output Level Adjust L1 Peak for Output Level and Frequency SW1 On OFF Switch C4 Fixed Capacitor for PRE EMPHASIS R13 R14 Fixed Resistors for PRE EMPHASIS C17 L1 R24 PEAK for OUTPUT LEVEL and FREQUENCY ON OFF SWITCH PEAKING OUTPUT LEVEL ADJUST 900100 SUBCARRIER OUTPUT LEVEL ADJUS...

Page 62: ... and should not be adjusted Figure 1 5 Rx Video Demodulator Adjustments 906556 Component Description R88 Squelch Threshold Adjustment R54 Baseband Gain Adjustment R55 Video Gain Adjustment R78 Discriminator Voltage Testpoint VIDEO GAIN ADJUSTMENT BASEBAND GAIN ADJUSTMENT SQUELCH THRESHOLD ADJUSTMENT SQUELCH LED RED SQUELCHED J1 1 15 J1 FRONT PANEL VIEW 906556 R88 R54 R55 R78 R88 R54 R55 R78 SUB CA...

Page 63: ...rrier is detected R2 Channel 2 Audio Level 8 dBm Adjust CR6 Audio 2 Green LED ON Subcarrier is detected R3 Channel 3 Audio Level 8 dBm Adjust CR7 Audio 3 Green LED ON Subcarrier is detected R4 Channel 4 Audio Level 8 dBm Adjust CR8 Audio 4 Green LED ON Subcarrier is detected 900414 1 15 J5 CHANNEL 4 CHANNEL 3 CHANNEL 2 CHANNEL 1 CH 1 CH 2 CH 3 CH 4 CH 1 AUDIO LEVEL ADJUST CH 2 AUDIO LEVEL ADJUS CH...

Page 64: ... Description C8 Discriminator Adjust for Distortion L1 Peak for S C Level U1 Pin 13 2 5V Vdc R21 Notch Filter Q Factor Adjust C19 Notch Filter Frequency Adjust R24 Flatness Adjust at 15 kHz C12 Fixed Capacitor for DE EMPHASIS R14 Fixed Resistor for DE EMPHASIS R24 C8 L1 C19 R21 NOTCH FILTER FREQUENCY ADJUST FLATNESS ADJUST AT 15 KHz DISCRIMINATOR ADJUST FOR DISTORTION PEAK FOR S C LEVEL AT U1 PIN ...

Page 65: ... Filter Equalizer Adjustments Table B 7 Jumper Configurations Figure B 8 Rx IF Filter Equalizer Component Description L9 L10 C16 Digital Video E6 E4 E6 E5 E3 E1 E3 E2 E9 E10 E9 E10 E13 E14 E13 E14 L10 L9 C16 E14 E13 E9 E10 E11 E8 E3 E1 E2 E15 VIDEO DIGITAL J2 E4 E5 E6 E16 DIGITAL VIDIEO F1 E7 E12 15V GND OUTPUT INPUT F2 U2 905550A J1 ...

Page 66: ...Note Switch S1 is factory set in the AGC position Figure B 9 IF Amp 905764 Component Description S1 Manual AGC Mode Select Switch See Note S2 Video Digital Mode Select Switch U1 Stepped Attenuator J5 R64 J2 J1 U1 J4 IF MON IF IN J3 TP2 VREF TP5 GND AGC TP4 TP3 VDET S1 TP1 VA2 OFFSET R109 S2 VIDEO DIGITAL SQLV R94 ZERO db R63 PWR OUT OUT 905884A LOG GAIN R104 MANUAL AGC 8 4 2 1 ON ...

Page 67: ...r Configurations Figure B 10 IF Limiter Amp Note Jumpers are set in Analog Digital position Component Description U11 Stepped Attenuator U10 Stepped Attenuator Digital Analog E19 E20 E21 E22 E9 E11 E9 E10 E3 E18 E7 E8 E4 E18 E4 E16 E18 E3 E15 E17 E8 E7 E14 E13 E12 E11 E9 E10 E22 E21 U3 15V E5 ALARM E6 U7 U9 K1 U5 U11 U10 905710A E1 16 8 4 2 1 8 4 2 1 E20 E19 ON ON ...

Page 68: ...IF Limiter Amp 905720 Modules B 12 DAR Plus Operator s Guide 400468 1 Rev C ...

Page 69: ...izer settings for the 6 12 and 13 GHz bands Refer to the following tables for the correct frequency band Table C 1 6 GHz Oscillator Switch Settings on page C 2 Table C 2 12 13 GHz Oscillator Switch Settings on page C 2 Set the correct frequency using S1 S4 as shown in Figure C 1 Figure C 1 Synthesizer Switch Locations ...

Page 70: ...5 9 2 9 0 13125 E F B 0 12775 2 4 9 0 13137 5 7 1 C 0 12787 5 B 5 9 0 13150 0 3 C 0 12800 4 7 9 0 13162 5 9 4 C 0 12812 5 D 8 9 0 13175 2 6 C 0 12825 6 A 9 0 13187 5 B 7 C 0 12837 5 F B 9 0 13200 4 9 C 0 12850 8 D 9 0 13212 5 D A C 0 12862 5 1 F 9 0 13225 6 C C 0 12875 A 0 A 0 13237 5 F D C 0 12887 5 3 2 A 0 13250 8 F C 0 12900 C 3 A 0 13262 5 1 1 D 0 12912 5 5 5 A 0 13275 A 2 D 0 12925 E 6 A 0 13...

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