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DT4572 X-Band Down Converter

Rev. 0

Redundant System Operation MM/DT4572.IOM

44

A.4.4 O

FFSET

A

DJUSTMENT

The offset is used to compensate for cable and switch losses. When the system is initially
set up and tested, each converter needs to be forced to backup and the offset adjusted to
minimize gain mismatch between the normal and bypassed mode. This offset will be
different for each converter and is stored in a table in the backup unit.

Set the offset as follows:

1

Connect a signal source to the input and a power meter or spectrum analyzer to the
output of the first online converter. Record the output power.

2

Force a backup of the first online unit and adjust the offset until the output power
matches what was recorded in step one.

3

Restore the online unit and repeat for the other online units.

A.4.5 R

EDUNDANCY

S

YSTEMS

- C

ONVERTER

R

EMOVAL

In a redundancy system, to remove an “inline” converter for repair the following
procedure must be used:

1

Force backup of faulted unit.

2

Turn the power switch on the inline converter rear panel to OFF, and remove the power
cord from the converter. DO NOT disconnect the RF and IF cables from the RSM
Module.

3

Unscrew the mounting screws on the RSM Module first, and then unscrew the rack
mounting screws on the front panel of the converter.

4

From the rear of the inline converter, hold the RSM Module and push the converter to
the front of the rack until RSM Module is free of the converter chassis.

5

Remove the inline converter from the front of the rack.

To install the replacement unit, the following procedure must be used:

1

Power up the new unit on the bench.

2

Configure the new unit for the correct redundancy settings (Redundant = ON, Address =
match old unit) and correct frequency and attenuation.

3

Power off the new unit.

4

Remove existing personality module from the new unit.

5

Carefully install the new unit into the rack. The existing module in the rack will be
plugged into the new unit.

6

Power up the new unit and un-force the backup.

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Summary of Contents for DT-4572

Page 1: ...DT 4572 X Band Down Converter Installation and Operation Manual Part Number MN DT4572 IOM Rev 0 ...

Page 2: ......

Page 3: ...e to page 3 Comments The following changes provide updated information for Table 1 This information will be incorporated into the next revision Change Specifics Table 1 DT 4572 X Band Down Converter Specifications IF Output Range 52 to 88 or 104 to 176 MHz optional 50 to 90 MHz or 100 to 180 MHz see Note 1 Transfer Ripple IF Bandwidth 0 25 dB 18 MHz optional 20 MHz see Note 1 0 75 dB 36 MHz option...

Page 4: ......

Page 5: ...ill be incorporated into the next revision Change Specifics 2 4 4 SUMMARY FAULT OUTPUT RELAY CONNECTOR P1 The summary fault output connector P1 is 9 pin D type DB9F connector The pin out specifications are contained in Table 7 The mating connector is a DB9M Table 7 P1 Summary Fault Connector Pin Out Pin Description 1 Summary Fault NC 2 Summary Fault NO 3 4 5 Ground 6 Summary Fault Com 7 External F...

Page 6: ......

Page 7: ... the USA Comtech EF Data 2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 FAX 480 333 2161 DT 4572 X Band Down Converter Installation and Operation Manual Part Number MN DT4572 IOM Rev 0 November 21 2002 Comtech EF Data is an ISO 9001 Registered Company ...

Page 8: ... be sent to the Customer Support Department at service comtechefdata com Contact us via the web at www comtechefdata com To return a Comtech EF Data product in warranty and out of warranty for repair or replacement 1 Request a Return Material Authorization RMA number from the Comtech EF Data Customer Support Department 2 Be prepared to supply the Customer Support representative with the model numb...

Page 9: ...demarks ix EMC Compliance x Federal Communications Commission FCC x Safety Compliance xi EN 60950 xi Warranty Policy xii CHAPTER 1 INTRODUCTION 1 1 1 Overview 1 1 2 Functional Description 1 1 3 Specifications 3 1 3 1 Dimensional Envelope DT 4572 6 1 4 Physical Configuration 7 1 5 Front Panel Display 8 1 6 Front Panel Test Point Samples 8 1 7 Prime Power Switch 8 ...

Page 10: ... Operation 13 CHAPTER 3 SYSTEM OPERATION 15 3 1 Overview 15 3 2 Switching Power ON 17 3 3 Operation 17 3 3 1 Converter Commands 25 3 3 2 Configuration Functions Menu 26 3 3 3 Pre select Function Menu 26 3 3 4 Monitor Status Function Menu 27 3 3 5 Current Faults Function Menu 27 3 3 6 Stored Faults 28 3 3 7 Utility Function Menu 29 APPENDIX A REDUNDANT SYSTEM OPERATION 31 A 1 Overview 31 A 2 Backup...

Page 11: ...9 B 4 Addresses 50 B 4 1 Physical Address 50 B 4 2 Virtual Address 50 B 5 Message Structure 51 B 5 1 Start Character 51 B 5 2 Device Address 51 B 5 3 Command 51 B 5 4 Confirmation Response 51 B 5 5 Error Response 52 B 5 6 End Of Message 52 B 6 Command Response Pairs 53 B 6 1 Utility Commands 53 B 6 2 Configuration Commands 56 B 6 3 Modes 59 B 6 4 Status Commands 61 B 6 5 Stored Alarm 65 B 7 Error ...

Page 12: ...ersion 72 C 3 Monitor Control 74 C 4 Installation Operation and Maintenance 74 APPENDIX D MAINTENANCE AND TROUBLESHOOTING 75 D 1 Overview 75 D 2 Maintenance Testing 76 D 2 1 Test Point Samples 76 D 2 2 Troubleshooting 77 D 2 3 Converter Faults 77 D 2 4 Converter I O Modules 79 D 3 Spares 79 INDEX 81 ...

Page 13: ...s Menu Commands 22 Figure 18 Current Faults Menu Commands 23 Figure 19 Stored Faults Menu Commands 23 Figure 20 Utility Function Menu Commands 24 Figure 21 1 1 Redundant Configuration Single Source IF Output w IOM and RSM XX Installed 34 Figure 22 1 1 Redundant Configuration Diagram Single Source IF Output w IOM and RSM XX Installed 34 Figure 23 1 1 Redundant Configuration Diagram Single Source RF...

Page 14: ...Table 3 J1 2 Wire EIA 485 Interface Pin Out 11 Table 4 J1 4 Wire EIA 485 Interface Pin Out 11 Table 5 J1 EIA 232C Interface Pin Out 11 Table 6 J3 High Speed Bus Connector Pin Out 12 Table 7 P1 Summary Fault Connector Pin Out 12 Table 8 Operating Functions Front Panel 16 Table 9 4572 Series Down Converter Configurations 33 Table 10 Remote Command Summary 68 ...

Page 15: ...AUTION may also be used to indicate other unsafe practices or risks of property damage WARNING Indicates a potentially hazardous situation that if not avoided could result in death or serious injury METRIC CONVERSION Metric conversion information is located on the inside back cover of this manual This information is provided to assist the operator in cross referencing English to Metric conversions...

Page 16: ...o 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 This equipment generates uses and can radiate radio frequency energy If not installed and used in accordance with the instruction manual it may cause harmful inte...

Page 17: ...pment specification as defined in EN60950 LOW VOLTAGE DIRECTIVE LVD The following information is applicable for the European Low Voltage Directive EN60950 HAR Type of power cord required for use in the European Community CAUTION Double pole Neutral Fusing ACHTUNG Zweipolige bzw Neutralleiter Sicherung International Symbols Symbol Definition Symbol Definition Alternating Current Protective Earth Fu...

Page 18: ...mtech EF Data No other warranty is expressed or implied Comtech EF Data specifically disclaims the implied warranties of merchantability and fitness for particular purpose EXCLUSIVE REMEDIES The remedies provided herein are the buyer s sole and exclusive remedies Comtech EF Data shall not be liable for any direct indirect special incidental or consequential damages whether based on contract tort o...

Page 19: ...for the transmission of SCPC DAMA and TDMA communication signals The Down Converters can also be used in communications system applications with full transponder HDTV and analog TV The converter is designed to be hard mounted in a standard 19 inch rack or cabinet or to be rack mounted using slide mechanisms provided with the converter to allow it to be serviced without its removal from the rack An...

Page 20: ... are located on the rear of the converter chassis Figure 1 Front Panel Model DT 4572 shown J4 J6 J8 J5 RF LP OUT LP IN IF J3 HSB P1 RELAY J1 COM 1 EXT REF J2B OUT EXT REF J2A IN MADE IN USA Figure 2 Rear Panel shown with RSM Module I O MODULE CONVERTER SIGNAL PATH MODULE POWER SUPPLY 5 10 MHz REF OSC RF INPUT 7250 7750 MHz IF OUTPUT 70 or 140 MHz MONITOR CONTROL OSC OSC SYNTHESIZER Figure 3 Typica...

Page 21: ...odule 11 dB Maximum at 0 dB Attenuation 50 Ω IF Output Output Level Range Intermodulation Non carrier Spurious Carrier Spurious Return Loss Impedance 20 dBm at 1 dB Compression 52 to 90 or 100 to 180 MHz 60 dBc 0 dBm Output SCL 80 dBm 65 dBc 0 dBm Output 23 dB Minimum with RF IF Connector Module or SW module 50 Ω or 75 Ω Transfer Gain Attenuation Adjust Gain Stability Ripple Slope Image Rejection ...

Page 22: ...Remote Control Rear Panel Comm Port EIA 485 or EIA 232C Indicators Front Panel Power On Receive Remote On Line Stored Fault Fault Green LED Yellow LED Yellow LED Yellow LED Red LED Red LED Test Points Front Panel RF Sample IF Sample Optional L O Sample replaces RF Sample 0 dBm Nominal SMA 20 dBc Nominal BNC 20 dBc Nominal Power Voltage Frequency Dissipation Power Option 90 to 250 VAC 47 to 63 Hz 6...

Page 23: ...n MM DT4572 IOM 5 Characteristic Specification Physical Width Height Depth Weight 19 Inches 48 26 cm 1 75 Inches 4 44 cm 22 Inches 55 90 cm 15 Pounds 7 00 kg MTBF 49 740 hrs calculated 100 000 hrs field experience Summary Alarm Relay Closure Form C ...

Page 24: ...IMENSIONAL ENVELOPE DT 4572 Dimensions are shown in both inches and centimeters 1 75 4 45 18 25 46 35 DT 4572 DOWN CONVERTER SAMPLE STATUS RF IF POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT ENT CLR 17 00 432 19 0 48 3 22 00 55 9 Figure 4 DT 4572 Dimensional Envelope ...

Page 25: ...wn Converter chassis with the cover removed Major chassis components are shown in Figure 5 The major module assemblies shown in the layout are Signal Path Module Step Loop Module Monitor Control Assembly Transmit I O Switch Module Reference Oscillator Assembly Sum Loop Module Power Supply Assembly Figure 5 Physical Configuration Down Converter ...

Page 26: ...T POINT SAMPLES Two test point connections are located on the front panel for monitoring the RF input and the IF output An SMA connector is provided for the RF input and a BNC connector is provided for the IF output There also is an optional RF LO monitor available that replaces the RF monitor 1 7 PRIME POWER SWITCH The On Off prime power switch is located on the rear of the chassis adjacent to th...

Page 27: ... to be returned to Comtech EF Data please use the original shipping container 2 2 RACK MOUNT INSTALLATION The DT 4572 Down Converter is designed for installation in a standard 19 inch rack cabinet or enclosure The converter chassis requires 1 3 4 inches of panel height space Adequate air ventilation should be provided on both sides of the rack mounted equipment If the converter is to be mounted on...

Page 28: ...panel as shown in Figure 6 The cable signal functions are listed in Table 2 2 4 1 REAR PANEL CONNECTIONS Table 2 Rear Panel Connectors Connector Description Prime Power AC Prime Power Input AC POWER Optional 48 Vdc J1 Serial Communications Interface for EIA 485 or EIA 232C COMM links COM 1 J2 External Reference Oscillator Input J3 High Speed Bus HSB J4 Converter IF Input IF J5 Converter RF Output ...

Page 29: ...9M Table 3 J1 2 Wire EIA 485 Interface Pin Out Table 4 J1 4 Wire EIA 485 Interface Pin Out Pin Description 1 GND Ground 2 3 4 RX TX Signal 5 RX TX Signal Complement 6 7 8 RX TX Signal 9 RX TX Signal Complement Pin Description 1 GND Ground 2 3 4 TX Signal 5 TX Signal Complement 6 7 8 RX Signal 9 RX Signal Complement Note Pins 8 9 are the loop to the next converter Table 5 J1 EIA 232C Interface Pin ...

Page 30: ...18 Cntl_3 2 Cntl_10 11 Aux_1 19 Cntl_1 3 Cntl_8 12 Rx Tx 20 14V Out 4 Cntl_6 13 GND 21 14V In 5 Cntl_4 14 Cntl_11 22 GND 6 Cntl_2 15 Cntl_9 23 Aux_2 7 Cntl_In 16 Cntl_7 24 GND 8 14V Out 17 Cntl_5 25 Rx Tx 9 14V In 2 4 4 SUMMARY FAULT OUTPUT RELAY CONNECTOR P1 The summary fault output connector P1 is 9 pin D type DB9M connector The pin out specifications are contained in Table 7 The mating connecto...

Page 31: ...In non redundant converter configuration the converter has an Input Output Module IOM XX for the RF input and the IF Output A converter with a Transmit or Receive Switch Module may be operated in a non redundant configuration if an IOM is unavailable Figure 7 is an illustration of the converter cable connections with an IOM installed Figure 8 is an illustration of the converter cable connections w...

Page 32: ...XX IF OUTPUT RF INPUT NO CONNECTION Figure 7 Non Redundant Converter Configuration NO CONNECTION J5 LP OUT LP IN RF J4 J6 J8 RSM XX J3 HSB IF IF OUTPUT RF INPUT IF OUTPUT DOWN CONVERTER RSM RF INPUT Figure 8 Non Redundant Converter Configuration With Receive Switch Module RSM XX Installed ...

Page 33: ...LED status indicators and the connectors Tables are provided to show the control and operating functions of the converter The front and rear panels are shown below Table 8 lists of the operating functions for the key pad LCD display LED indicators and test sample connections on the front panel Figure 9 Front Panel Model DT 4572 shown J4 J6 J8 J5 RF LP OUT LP IN IF J3 HSB P1 RELAY J1 COM 1 EXT REF ...

Page 34: ...n Arrow key Selects the operating menu and data values LCD Display Displays commands and data entered into the key pad Indicator Color Function POWER ON Green Prime power is applied when the light is on TRANSMIT Yellow Transmit function operating when the light is on REMOTE Yellow In Remote Control Mode when the light is on ON LINE Yellow Operating on line to transmit data when the light is on FAU...

Page 35: ...uld be similar to DT 4572 SW VER 4 06 SN4572XXXX 3 3 OPERATION Local operation of the RF Down Converter is controlled by operator input commands initiated through the six button key pad on the front panel shown in Figure 11 The key pad is the local operator s interface to control configure and monitor the status of the converter Operator inputs and commands entered into the key pad are displayed b...

Page 36: ...AY KEY PAD ENT CLR SELECT MONITOR STATUS MENU SELECT PRE SELECT MENU SELECT MONITOR STATUS MENU SELECT CONFIGURATION MENU SELECT CURRENT FAULTS MENU SELECT STORED FAULTS MENU SELECT UTILITY FUNCTIONS MENU DT 4572 SOFTWARE VERSION 4 06 Figure 12 Converter Operating Command Functions ...

Page 37: ...TER SELECT CONFIGURATION MENU ENTRY MODE REMOTE COLD START DISABLED FAULT RECOVERY MANUAL REDUNDANCY CONFIG OFF Displayed only when there is a 5 10 MHz reference input LEGEND DISPLAY KEY PAD ENT CLR SELECT MONITOR STATUS MENU REFERENCE PRESENT EXTERNAL 5 MHz Figure 13 Configuration Menu Commands Redundancy OFF ...

Page 38: ... CONFIG OFF Displayed only when there is a 5 10 MHz reference input Manual when Redundancy Config ON and not in BU REDUNDANCY CONFIG ON CONVERTER XX ENT DOWN ENT CLR LEGEND DISPLAY KEY PAD ENT CLR SELECT MONITOR STATUS MENU FREQ 72XX XXX MHz ATTN 10 00 DB Rx OFF REFERENCE PRESENT EXTERNAL 5 MHz Figure 14 Configuration Menu Commands Redundancy ON Backup Unit Not Selected ...

Page 39: ...ER XX ENT DOWN ENT ENT UP ENT REDUNDANCY CONFIG ON CONVERTER 01 ENT RIGHT UP ENT REDUNDANCY CONFIG ON CONVERTER BU 1 03 ENT RIGHT UP UP ENT CONVERTER 123456789ABC AUTO MAN AAM CONV 01 OFFSET 00 00 DB ACTIVATE BACKUP NO CONV 03 FRQ XXXXX XXX ATEN 10 00 MANUAL OK LEGEND DISPLAY KEY PAD ENT CLR SELECT MONITOR STATUS MENU FREQ 72XX XXX MHz ATTN 10 00 DB Rx OFF REFERENCE PRESENT EXTERNAL 5 MHz Figure 1...

Page 40: ...NT CLR SELECT MONITOR STATUS MENU DISPLAY PRE SELECT XX XXXXX XXX MHz XX XX DB PRE SELECT XX CONFIGURE CONVERTER TO Figure 16 Pre Select Menu Commands ENTER SELECT MONITOR STATUS MENU SYNTH TUNING X X V COARSE X XX FINE X XX LEGEND DISPLAY KEY PAD ENT CLR SELECT MONITOR STATUS MENU 15VDC 15 6 14VDC 14 0 VCC 5 0 5VDis 4 0 IFLO TUNING X X V CONVERTER TEMP 50C Figure 17 Monitor Status Menu Commands ...

Page 41: ...ITOR STATUS MENU POWER FAULTS 15VDC OK 14VDC OK VCC OK REFERENCE LOCK DET OK INFO LOCK DETECT OK Figure 18 Current Faults Menu Commands ENTER SELECT STORED FAULTS MENU ST FAULT XX 19 20 05 OK FINE LOCK 05 19 02 LEGEND DISPLAY KEY PAD ENT CLR SELECT MONITOR STATUS MENU ENT UP to scroll thru Stored Faults CLR to return TOTAL FAULTS STORED XX LAST 19 20 05 05 19 02 FAULTS NO CLEAR ALL STORED Figure 1...

Page 42: ... MENU DISPLAY CONTRAST XX DISPLAY BRIGHTNESS XX LAMP TEST OFF LEGEND DISPLAY KEY PAD ENT CLR SELECT MONITOR STATUS MENU TIME 10 22 05AM DATE 05 19 02 ADDR XXX BAUD YYYY P ZZ SERIAL MODE EIA232C REFERENCE FREQUENCY ADJUSTMENT XXX ADJUSTMENT X X CONVERTER SLOPE Figure 20 Utility Function Menu Commands ...

Page 43: ...ction of another function Any one of the six Command Function Menus can be selected using this procedure Once a Command Function has been selected use the RIGHT or LEFT arrow key pad buttons to sequence through the Operating Mode Commands Each of the modes will be displayed on the LCD display A specific operating mode is selected by pressing the ENT button If an mode is selected in error press the...

Page 44: ...eference is displayed only when the 5 or 10 MHz external reference input to the converter is present 3 3 2 3 ENTRY MODE COLD START The entry mode is Local or Remote The default is Remote COLD Start The COLD Start Mode if enabled mutes the converter output signal for a pre determined time 15 minutes after power is applied to the converter to ensure that the reference oscillator is stable The defaul...

Page 45: ...on settings into a converter 3 3 4 MONITOR STATUS FUNCTION MENU Monitors and displays the status of 15 and 14 VDC power supplies Converter internal temperature IFLO tuning voltage level Synthesizer Sum Coarse and Fine Loop tuning 3 3 5 CURRENT FAULTS FUNCTION MENU Displays the status of the current fault conditions The LCD display will indicate FT when a fault condition exists The display will ind...

Page 46: ...cur The stored faults remain in memory until a clear command is entered When the number of faults reaches 100 the 100th fault will display ER 3 3 6 1 TOTAL STORED FAULTS Displays the total number of faults stored The most recent fault stored is displayed on the LCD display 3 3 6 2 CLEAR ALL STORED FAULTS Input command to clear all faults The command is YES or NO which is displayed on the LCD displ...

Page 47: ...seconds DATE The date is displayed in month day and year Serial MODE communications link EIA 485 or EIA 232C Physical Address The default address starts from 001 BAUD Rate The default baud rate is 9600 PARITY Even Odd or None Display Controls DISPLAY CONTRAST The default is 15 with values from 0 30 DISPLAY BRIGHTNESS The default is 15 with values from 0 30 REF Adjust REFERENCE FREQUENCY ADJUSTMENT...

Page 48: ...DT4572 X Band Down Converter Rev 0 System Operation MM DT4572 IOM 30 NOTES ...

Page 49: ...peed Bus HSB provides the communications interface between the backup and online converters to detect faults and reconfigure the subsystem to replace the failed converter When a faulted converter is removed from active operation it is detached from the active converter chain by separating the converter from its switch module leaving the active online converter chain intact through the switch modul...

Page 50: ...itself to replace the faulted converter The HSB interface also is used in the backup Converter to monitor configuration changes made to an online converter Changes in frequency gain or polarity are immediately entered into the backup table as well as information from new online units The high speed bus does not interfere with the remote serial communication link access to any of the converters in ...

Page 51: ...t to the backup Converter Figure 21 is an illustration of the cable connections between the converters Figure 22 is a block diagram of this 1 1 redundant converter configuration Dual Source IF Output Configuration Two IF outputs IF output 1 priority and IF output 2 are switched in the Receive Switch Module RSM to provide redundant operation of the converters The converters provide two switched IF ...

Page 52: ...IF J5 CUSTOMER SUPPLIED RF DIVIDER RF IF OUTPUT Figure 21 1 1 Redundant Configuration Single Source IF Output w IOM and RSM XX Installed IF OUTPUT IF LOAD DOWN CONVERTER IOM BACKUP UNIT RF INPUT DOWN CONVERTER RSM Customer Supplied RF Divider Figure 22 1 1 Redundant Configuration Diagram Single Source IF Output w IOM and RSM XX Installed ...

Page 53: ... EQ Out EQ In EQ NO Closed When EQ Faults LP In Alarm Cable IF Load or Loop to Next Unit RF Load or Loop to Next Unit Figure 23 1 1 Redundant Configuration Diagram Single Source RF Input with IOM XX and TSEQM XX Installed LP OUT LP IN RF J9 J5 IF J4 IOM XX LP OUT J3 HSB J4 J6 J8 IF J5 CUSTOMER SUPPLIED RF DIVIDER RF IF OUTPUT 2 IF OUTPUT 1 Figure 24 1 1 Redundant Configuration Dual Source IF Input...

Page 54: ...System Operation MM DT4572 IOM 36 IF OUTPUT 1 DOWN CONVERTER IOM BACKUP UNIT RF INPUT DOWN CONVERTER RSM Customer Supplied RF Divider IF OUTPUT 2 Figure 25 1 1 Redundant Configuration Diagram Dual Source IF Output with IOM XX and RSM XX Installed ...

Page 55: ...ONVERTER No 2 CONVERTER No N TO CONN J6 ON CVTR 3 IF OUTPUT 1 LP IN LP IN IF J4 IOM XX IF J6 LP OUT J4 J8 IF J3 HSB LP OUT LP IN J4 J6 J8 IF LP OUT J4 J6 J8 TO CONN J3 ON CVTR 3 TO CONN J8 ON CVTR N 1 TO CONN J3 ON CVTR N 1 IF LOAD IF OUTPUT 2 IF OUTPUT 3 RF J5 RF J RF J5 RF J5 RF J5 POL 1 POL 2 POL 1 POL 2 POL 1 Figure 26 Dual Source1 N Redundant Configuration with PSM XX and RSM XX Installed ...

Page 56: ...BACKUP UNIT DOWN CONVERTER RSM 1 IF OUTPUT 1 RF INPUT 1 POL 1 DOWN CONVERTER RSM 3 DOWN CONVERTER RSM 2 IF OUTPUT 2 IF OUTPUT 3 TO CONVERTER 4 IF LP IN CONN J6 TO CONVERTER N 1 IF LP OUT CONN J8 RF INPUT Customer Supplied RF Dividers RF INPUT 2 POL 2 Figure 27 Dual Source 1 N Redundant Configuration Diagram with PSM XX and RSM XX Installed ...

Page 57: ...ONVERTER BU 1 03 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 01 POL 1 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 02 POL 1 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 03 POL 1 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS Figure 28 1 3 Front Panel D...

Page 58: ...ation In this mode failure of an online converter will automatically cause a switchover to the redundant unit to occur In the field the simplest way to test this mode is to turn off an online unit The AUTO MANUAL selection is made in the converter The online units will report their status as show in Figure 29 CONVERTER 123456789ABC AUTO MAN AAA POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT S...

Page 59: ... translation in place of the online unit As soon as power is restored converter 1 will come back online POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS CONV 01 OFFSET 00 00 DB ACTIVATE BACKUP ACTIVE POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 02 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 03 POWE...

Page 60: ...backup Converter If an online unit is configured to manual mode and this unit faults no switchover will occur CONVERTER 123456789ABC AUTO MAN MAA POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS FREQ 72XX XXX MHz ...

Page 61: ... which converter is being by passed POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS CONV 01 OFFSET 00 00 DB ACTIVATE BACKUP FORCED REDUNDANCY CONFIG ON CONVERTER 01 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 02 POWER ON TRANSMIT REMOTE ON LINE FAULT STORED FAULT STATUS REDUNDANCY CONFIG ON CONVERTER 03 POWER ON TRANSMIT REMOTE ON LINE FAULT...

Page 62: ...nverter for repair the following procedure must be used 1 Force backup of faulted unit 2 Turn the power switch on the inline converter rear panel to OFF and remove the power cord from the converter DO NOT disconnect the RF and IF cables from the RSM Module 3 Unscrew the mounting screws on the RSM Module first and then unscrew the rack mounting screws on the front panel of the converter 4 From the ...

Page 63: ...lowing procedure must be used 1 Turn the power switch on the backup Converter rear panel to OFF and remove the power cord from the converter Disconnect the RF and IF cables from the IOM Module 2 Unscrew the rack mounting screws on the front panel of the backup Converter 3 Remove the backup Converter from the front of the rack ...

Page 64: ...DT4572 X Band Down Converter Rev 0 Redundant System Operation MM DT4572 IOM 46 NOTES ...

Page 65: ...he cost and complexity associated with operating in redundancy subsystem configurations The backup Converter in the redundancy subsystem automatically monitors the configuration and status for each of the primary chained converters This information is communicated via the High Speed Bus interface is updated at a polling rate of 1 95 milliseconds per primary converter If a primary converter fails t...

Page 66: ... Rate is 9600 Baud rates of 1200 2400 4800 19200 and 38400 are also supported B 2 3 FORMAT The following parameters are the default character format 1 Start Bit 8 Data Bits No Parity Bit 1 Stop Bit B 2 4 CHARACTER SET The character set implemented is ASCII B 2 5 RESPONSE TIMEOUT A minimum of 500 milliseconds should be provided before declaring a no response instance at which time the command shoul...

Page 67: ... be accessed If an external Monitor and Control Computer is used one EIA 232C port per converter is required This mode is commonly used with an ASCII terminal for bench testing B 3 2 INDIRECT ACCESS Converters in Redundancy Mode may be addressed indirectly by adding a virtual address to the backup Converter s physical address The virtual address corresponds to converter s position in the redundant...

Page 68: ...ress consists of a string of 1 2 or 3 numbers from 1 to 255 The physical address is entered into a converter via the front panel For Direct Access the physical address is the only address required to command a converter A backup Converter or a stand a lone converter can only be accessed with a physical address Example 10 Addresses converter whose physical address is 10 B 4 2 VIRTUAL ADDRESS In ord...

Page 69: ...s Example 3V12 B 5 3 COMMAND A Command is a variable length character string beginning with a and containing either an instruction or an instruction and data for a converter to act upon If data is passed by command it is appended to the instruction by an underscore _ If data is retrieved by command underscore follows the instruction flagging the converter to supply data in a response In this docum...

Page 70: ...g explaining the error for the convenience of a human operator For this document ER is used for the generic case examples response Example DEV COM ER Error Message cr lf B 5 6 END OF MESSAGE End of message strings were devised in such a way that an orderly screen presentation would result when converters are controlled by simple ASCII terminals B 5 6 1 COMMAND ENDING The end of message for a comma...

Page 71: ...dd yy cr mm Month Confirmation DEV DAT_mm dd yy cr lf dd Day yy Year Retrieve Date DEV DAT_ cr Confirmation DEV DAT_mm dd yy cr lf B 6 1 3 PHYSICAL ADDRESS The default Physical Address from is 1 Command Details Set Physical Address DEV SPA_xxx cr xxx 1 to 255 Confirmation DEV SPA_xxx cr lf Retrieve Phys Addr DEV SPA_ cr Confirmation DEV SPA_xxx cr lf B 6 1 4 BAUD RATE The default baud rate is 9600...

Page 72: ...LCD_xx cr xx 0 to 30 Confirmation DEV LCD_xx cr lf Retrieve Brightness DEV LCD_ cr Confirmation DEV LCD_xx cr lf B 6 1 7 REFERENCE OSCILLATOR TUNING The default is 87 Command Details Set Oscillator DEV SRO_xxx cr xxx 0 to 255 Confirmation DEV SRO_xxx cr lf Retrieve Tuning DEV SRO_ cr Confirmation DEV SRO_xxx cr lf B 6 1 8 CONVERTER SLOPE ADJUSTMENT The default is 0 3 Command Details Set Slope Adju...

Page 73: ...tion DEV RET_xxxxxxxxxx yyyyyyy cr lf xxxxxxxxxx Model Number yyyyyyy Software Version B 6 1 10 FIRMWARE INFORMATION Retrieves the firmware information of the unit Command Details Retrieve Firmware Information DEV FRW_ cr Confirmation DEV FRW_ cr BULK FWnnnn nr Ver x xx cr M C FWnnnn nr Ver x xx cr FPGA FWnnnn nr Ver x xx cr if Where nnnn n firmware number r firmware revision x xx firmware version...

Page 74: ... to fill the LCD field The AID display will alternate with the Equipment type display by use of the clear function key on the front panel The default is AID MESSAGE Command Details Application ID DEV AID_xxxxxxx xxxxx cr Confirmation DEV AID_ cr xxxxxxxxxxxxxxxxxxxxxxxx cr xxxxxxxxxxxxxxxxxxxxxxxx cr lf Retrieve ID DEV AID_ cr Confirmation DEV AID_ cr xxxxxxxxxxxxxxxxxxxxxxxx cr xxxxxxxxxxxxxxxxxx...

Page 75: ...es the output signal for a predetermined time following Power Up to ensure a stable reference oscillator 15 minutes The default is OFF This command is disabled in redundant systems i e COMMAND NOT AVAILABLE Command Details Set Cold Start DEV CLD_xxx cr xxx ON or OFF Confirmation DEV CLD_xxx cr lf Retrieve Status DEV CLD_ cr Confirmation DEV CLD_xxx cr lf B 6 2 4 MUTE The default is ON Command Deta...

Page 76: ...covery DEV AFR_xxx cr xxx ON or 0FF Confirmation DEV AFR_xxx cr lf Retrieve Status DEV AFR_ cr Confirmation DEV AFR_xxx cr lf B 6 2 6 PROGRAM PRESET This command is used to stores up to 32 preset frequency and attenuation settings Command Details Program Preset DEV PGM_nn_xxxxx xxx_yy yy cr Confirmation DEV PGM_nn_xxxxx xxx_yy yy cr lf Note nn Preset Number 01 to 32 xxxx xxx Frequency RFLow to RFH...

Page 77: ...Only programmed preset numbers are available B 6 3 MODES There are two modes of operation that may intersect Redundant Mode and Automatic Mode B 6 3 1 REDUNDANCY MODE Since the default mode is OFF each converter including the backup Converter must be commanded into the Redundancy Mode Polling on the high speed bus will not begin until the position assignments are made Command Details Redundancy Mo...

Page 78: ...ndant rack should be assigned as the Backup unit Likewise assignment of chain positions in a redundant rack should be made according to the physical allocation of each converter in the rack i e The top converter should be the Backup the second converter should be assigned chain position 1 the third converter position 2 etc B 6 3 2 AUTOMATIC MANUAL MODE This command provides for automatic switching...

Page 79: ...t displayed zzzzz NONE if no backup active ACTIVE if an automatic backup has occurred FORCED if a forced backup is active B 6 4 STATUS COMMANDS Status commands retrieve configuration maintenance and alarm status in summary form B 6 4 1 CONFIGURATION STATUS Command Details Configuration Status DEV RCS_ cr Confirmation DEV RCS_ cr FRE_xxxxx xxx cr Frequency ATT_yy yy cr Attenuator TX_nnn cr Transmit...

Page 80: ...DD_xxx cr Address 001 to 255 BR_nnnn cr Baud Rate 1200 2400 4800 9600 19K2 or 38K4 FMT_x y z cr Data Format x data y parity z stop bit 8 N 1 7 E 2 7 O 2 REF_xxx cr Osc Adjust 000 to 255 SLP_x x cr Slope Adjust 0 0 to 1 0 CON_xx cr LCD Contrast 0 to 30 LCD_xx cr lf LCD Brightness 0 to 30 B 6 4 4 ALARM STATUS Command Details Alarm Status DEV RAS_ cr Confirmation DEV RAS_ cr P15_xx cr 15 VDC Fault P1...

Page 81: ...DEV TSC_ cr Confirmation DEV TSC_nnn cr lf nnn YES NO B 6 4 7 PACKED CONFIGURATION STATUS Configuration Status DEV PACRCS_ cr Confirmation DEV PACRCS_aaaabbbcdeffgghijkl cr lf where aaaa of 125kHz steps above base frequency1 bbb of 0 25 dB steps above 0 00 dB2 c 1 if Transmitter ON 0 if OFF d 1 if unit ONLINE 0 if OFFLINE e 1 if Redundancy ON else 0 ff converter 01 12 BU or 00 if e 0 gg 00 if ff i...

Page 82: ...0 0xFF gg SUM tune scaled 54mV per count 0x00 0xFF hh COARSE tune scaled 78mV per count 0x00 0xFF ii FINE tune scaled 89mV per count 0x00 0xFF B 6 4 9 PACKED UTILITY STATUS Packed Utility Status DEV PACRUS_ cr Confirmation DEV PACRUS_abbcdeeffghhii cr lf where a 0 EIA 232C 1 EIA 485 bb Address in hex 01 to FF c 0 if Baud Rate 38400 1 if Baud rate 19200 2 if Baud rate 9600 3 if Baud rate 4800 4 if ...

Page 83: ... 0 B 6 5 STORED ALARM The 100 alarms are date time stamped and stored in memory as they occur The alarm entry is also updated with its date time of clearance The entry remains in memory until it is removed by command B 6 5 1 TOTAL STORED ALARMS This command retrieves the total number of stored alarms and the time and date of the most recent alarm Retrieve Total Alarms DEV TSA_ cr Confirmation DEV ...

Page 84: ... of the stored alarms This command is currently unavailable when using virtual addressing mode List All Alarms DEV LAA_ cr Confirmation DEV LAA_ cr xx yyyyyyyyyyy hh mm ss mm dd yy cr xxx yyyyyyyyyyy hh mm ss mm dd yy cr lf Where xx stored fault number yyyyyyyyyyy fault description hh mm ss fault time mm dd yy fault date ...

Page 85: ... 2 CONFIGURATION ERRORS The following Error Responses may be generated by configuration commands DEV COM LO DEVICE IN LOCAL MODE cr lf B 7 3 MODE ERRORS The following Error Responses may be generated by Mode selection DEV COM AE ONLY VALID WHEN BACKUP cr lf DEV COM OE OFFLINE NOT AVAILABLE cr lf DEV COM CN COMMAND NOT AVAILABLE cr lf B 7 4 TIME OUTS A time out should be assumed if there is no resp...

Page 86: ...e Information DEV FRW_ cr B 6 1 10 Set Application ID Message DEV AID_xxxxx xxxxx cr B 6 1 11 Configuration Commands Paragraph Set Frequency DEV FRE_xxxxx xxx cr B 6 2 1 Set Attenuation DEV ATT_xx xx cr B 6 2 2 Select Cold Start Mode DEV CLD_xxx cr B 6 2 3 Mute Unmute Converter DEV MUT_xxx cr B 6 2 4 Select Auto Fault Recovery Mode DEV AFR_xxx cr B 6 2 5 Program a Preset DEV PGM_nn_xxxxx xxx_yy yy...

Page 87: ...V RAS_ cr B 6 4 4 Summary Alarm Status DEV SAS_ cr B 6 4 5 Terminal Status Change DEV TSC_ cr B 6 4 6 Packed Configuration Status DEV PACRCS_ cr B 6 4 7 Packed Maintenance Status DEV PACRMS_ cr B 6 4 8 Packed Utility Status DEV PACRUS_ cr B 6 4 9 Packed Alarm Status DEV PACRAS_ cr B 6 4 10 Stored Alarm Commands Paragraph Retrieve Total Stored Alarms DEV TSA_ cr B 6 5 1 Clear All Stored Alarms DEV ...

Page 88: ...DT4572 X Band Down Converter Rev 0 Remote Control MM DT4572 IOM 70 NOTES ...

Page 89: ...ssion standards The close in phase noise is also very low make the converter ideal for low bit rate digital circuits such as used in DAMA hub earth stations A selectable EIA 232C or EIA 485 remote control serial communications connector interface is provided on the rear of the converter All configuration control status retrieval and adjustments are available as ASCII commands through the serial in...

Page 90: ...e made as well as information from new on line units The HSB does not interfere with the remote control communications link for access to any of the converters in the Daisy Chain The DT 4572 Down Converter are a standard 19 inch rack mounted units 1 75 inches in height The converter is 22 inches deep and weighs 25 pounds Prime power the converter can be either 100 to 125 VAC or 205 to 240 VAC at 4...

Page 91: ...ration MM DT4572 IOM 73 I O MODULE CONVERTER SIGNAL PATH MODULE POWER SUPPLY 5 10 MHz REF OSC RF INPUT 7250 7750 MHz IF OUTPUT 70 or 140 MHz MONITOR CONTROL OSC OSC SYNTHESIZER Figure 33 Typical Converter Functional Block Diagram Model DT 4572 shown ...

Page 92: ...on the LCD display on the front panel A converter fault is indicated by the LED indicator on the front panel Specific fault conditions are displayed on the LCD display through local key pad input commands C 4 INSTALLATION OPERATION AND MAINTENANCE Refer to Chapter 1 for a functional description of the converter interfaces Refer to Chapter 2 for converter installation and mounting instructions Refe...

Page 93: ...nel in the checkout maintenance and troubleshooting of the converter Comtech EF Data recommends that spare replacement converters be used to replace converters removed from the system for maintenance Troubleshooting procedures are provided for fault isolation to the module level The input and output signals the interconnecting cables and the location of the modules are as shown in Figure 34 ...

Page 94: ...ting Cable Diagram with TSM Switching Module D 2 MAINTENANCE TESTING Use the instructions in Chapter 2 Installation for installing the converter for checkout and the procedures in Chapter 3 System Operation for operating the converter The converter is a Down Converter which translates the input RF frequency to an output IF frequency The RF input level is 45 dBm typical and the RF output level is 0...

Page 95: ... D 2 3 2 DC POWER SUPPLY MODULE 15 Vdc A fault FT indicates a voltage level exceeding 10 of the power supply voltage Check the output of the DC Power Supply Module The typical current output level is 3 0 amps Check all connections to make sure they are secure If the voltage exceeds 10 or the power supply module current is not approximately 3 0 amps or the fault still exists remove the power supply...

Page 96: ...not locked Check all connections to the converter module to make sure they are secure If the fault still exists remove the Fine Step Module and return it to Comtech EF Data for repair FINE LOOP DETECT A fault FT indicates that the fine loop is not locked Check all connections to the converter module to make sure they are secure If the fault still exists remove the Fine Step Module and return it to...

Page 97: ...rews holding the I O Module to the converter chassis are installed hand tight IMPORTANT When installing an I O Module DO NOT use a screwdriver to tighten the module mounting screws install screws hand tight only D 3 SPARES Comtech EF Data recommends sparing at the RF converter level If sparing at a lower level is desired please contact Comtech EF Data for the correct spares for your particular con...

Page 98: ...DT4572 X Band Down Converter Rev 0 Maintenance and Troubleshooting MM DT4572 IOM 80 NOTES ...

Page 99: ...Converter I O Modules 79 Converter Remote Command Summary 68 Current Faults Function Menu 27 Customer Support ii D Detachable Modules 32 Device Address 51 Dimensional Envelope DT 4572 6 Direct Access 49 E EIA 485 EIA 232C Interface COM 1 Connector J1 11 EMC Compliance x EN 60950 xi End Of Message 52 Error Processing 67 Error Response 52 F Federal Communications Commission FCC x FIGURES VII Format ...

Page 100: ...ctions 10 Redundancy Systems Converter Removal44 Redundant Configurations 33 Redundant System Configuration 39 REDUNDANT SYSTEM OPERATION 31 REMOTE CONTROL 47 Response Timeout 48 RF Signal Conversion 72 S Safety Compliance xi Spares 79 Specifications 3 Start Character 51 Status Commands 61 Stored Alarm 65 Stored Faults 28 Summary Fault Output RELAY Connector P1 12 Switching Power ON 17 SYSTEM OPER...

Page 101: ...x 103 1 609 x 103 1 609 1 mm 0 03937 1 kilometer 0 621 Temperature Conversions Units of Weight Unit Gram Ounce Avoirdupois Ounce Troy Pound Avoir Pound Troy Kilogram 1 gram 0 03527 0 03215 0 002205 0 002679 0 001 1 oz avoir 28 35 0 9115 0 0625 0 07595 0 02835 1 oz troy 31 10 1 097 0 06857 0 08333 0 03110 1 lb avoir 453 6 16 0 14 58 1 215 0 4536 1 lb Troy 373 2 13 17 12 0 0 8229 0 3732 1 kilogram 1...

Page 102: ...2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 Phone 480 333 2161 FAX ...

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