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SLM-5650 Satellite Modem

Revision 1

Options

MN/SLM5650.IOM

A–3

A.3

Reed-Solomon Outer Codec

The concatenation of an outer Reed-Solomon (R-S) Codec with a Viterbi decoder first
became popular in the early 1990's. It permits significant improvements in error performance
without significant bandwidth expansion.

The coding overhead added by the R-S outer Codec is typically around 10%, which translates
to a 0.4 dB power penalty for a given link. Reed-Solomon codes are block codes (as opposed
to Viterbi and Sequential, which are convolutional), and in order to be processed correctly the
data must be framed and de-framed. Additionally, R-S codes are limited in how well they
can correct errors that occur in bursts.

This, unfortunately, is the nature of the uncorrected errors from Viterbi decoders, which
produce clusters of errors that are multiples of half the constraint length. For this reason, the
data must be interleaved following R-S encoding, and is then de-interleaved prior to
decoding. This ensures that a single burst of errors leaving the Viterbi decoder is spread out
over a number of interleaving frames, so errors entering the R-S decoder do not exceed its
capacity to correct those errors.

In the case of the SLM-5650, different R-S code rates are used, according to the mode of
operation:

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Содержание SLM-5650

Страница 1: ...d Operation Manual IMPORTANT NOTE The information contained in this document supersedes all previously published information regarding this product This manual is subject to change without prior notic...

Страница 2: ......

Страница 3: ...ev 2 Errata Number ER SLM5650 EA2 Agile Document ID ER SLM5650 EA2 Agile CO Number CO1453 Change Specifics This information will be incorporated into the next revision Front Cover Removed Preliminary...

Страница 4: ...AGILE DOC ID ER SLM5650 EA2 THIS DOCUMENT IS NOT SUBJECT TO REVISION UPDATE AGILE CO1453 2 This page is intentionally blank...

Страница 5: ...Installation Date October 9 2008 Original Manual Part Number Rev MN SLM5650 IOM Rev 2 Agile Document ID ER SLM5650 EB2 Agile CO Number C05284 Change Specifics In Chapter 2 INSTALLATION Sect 2 3 8 Aux...

Страница 6: ...AGILE DOC ID ER SLM5650 EB2 THIS DOCUMENT IS NOT SUBJECT TO REVISION UPDATE AGILE C05284 2 This page is intentionally blank...

Страница 7: ...the USA Comtech EF Data 2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 FAX 480 333 2161 SLM 5650 Satellite Modem Installation and Operation Manual Part Number MN SLM5650 IOM Revision 2 Aug...

Страница 8: ...Department at service comtechefdata com Contact us via the web at 0Hwww comtechefdata com 1 To return a Comtech EF Data product in warranty and out of warranty for repair or replacement 2 Request a R...

Страница 9: ...1 4 2 Open Networks INTELSAT 1 5 1 4 3 OM 73 1 5 1 5 Data Interfaces 1 5 1 5 1 TIA EIA 530 1 6 1 5 2 TIA EIA 613 HSSI 1 6 1 5 3 Gigabit Ethernet 1 6 1 6 Independent Tx and Rx Function 1 6 1 7 Interope...

Страница 10: ...4 1 8 3 8 5 16 QAM BER Performance Viterbi Decoder and Reed Solomon 1 14 1 8 3 8 6 BER Performance Turbo Products Code Decoding 1 15 1 8 4 BER Performance with Symmetrical Adjacent Carriers 1 16 1 8 5...

Страница 11: ...Screen 4 6 4 3 Main Menu 4 6 4 3 1 Select Config 4 7 4 3 1 1 Select CONFIG Transmit 4 8 4 3 1 2 Select CONFIG Receive 4 11 4 3 1 3 Select CONFIG Mode 4 16 4 3 1 4 Select Configuration AUPC Local 4 17...

Страница 12: ...5 2 5 1 2 Interface Checkout 5 2 5 1 3 Modulator Checkout 5 3 5 2 Demodulator Checkout 5 6 5 3 Fault Isolation 5 9 5 4 System Faults Alarms 5 10 APPENDIX A OPTIONS A 1 APPENDIX B REMOTE CONTROL B 1 AP...

Страница 13: ...2 Typical Customized Rack 2 3 Figure 2 3 Rear Panel 2 4 Figure 3 1 IDR IBS G 703 Master Master Clocking Diagram 3 12 Figure 3 2 IDR IBS G 703 Master Slave Clocking Diagram 3 13 Figure 3 3 Clock Slip...

Страница 14: ...4 Table 1 9 BER Performance TPC Decoding 1 15 Table 1 10 Acceptable ACI Degradation with Spacing Factor of 1 2 1 16 Table 3 1 OM 73 Mode 3 1 Table 3 2 MIL STD 188 165A Mode 3 2 Table 3 3 IESS 308 Mode...

Страница 15: ...intended for earth station engineers technicians and operators responsible for the operation and maintenance of the SLM 5650 Related Documents The following documents are referenced in this manual De...

Страница 16: ...result in minor or moderate injury CAUTION may also be used to indicate other unsafe practices or risks of property damage WARNING WARNING indicates a potentially hazardous situation that if not avoid...

Страница 17: ...eristics of the unbalanced and balanced voltage digital interface circuits applicable to both long haul and tactical communications Specifically these references apply to the MIL STD 188 114A electric...

Страница 18: ...lded from end to end ensuring a continuous ground shield The following information is applicable for the European Low Voltage Directive EN60950 HAR Type of power cord required for use in the European...

Страница 19: ...o 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 he...

Страница 20: ..._______________________________________________ ______________________________________________________________________________ _________________________________________________________________________...

Страница 21: ...cations that require state of the art modulation and coding techniques to optimize satellite transponder bandwidth usage while retaining backward compatibility in government and military communication...

Страница 22: ...sociated transmit clock Asymmetrical Loop Timing Full featured built in BER test set Electrical and Ethernet Rx constellation monitor EIA 485 and EIA 232 interface for remote control Ethernet interfac...

Страница 23: ...The user can expect A highly reliable modem Low weight and low power dissipation A rugged one rack unit enclosure that defines state of the art The modem is designed for installation in fixed or mobil...

Страница 24: ...x Rx Baseband Processing Bit Error Test Set Tx FEC Reed Solomon Bypass Viterbi Bypass Rx FEC Reed Solomon Bypass Viterbi Bypass Power Supply uP Keypad Display Modulator Nyquist Filtering Constellation...

Страница 25: ...d modem parameters such as modulation FEC and scrambling The modem meets INTELSAT certification requirements and is capable of operating in such open networks over commercial satellites IAW IESS 308 I...

Страница 26: ...ator IP packet traffic is framed via HDLC encapsulation by the GBE 5650 logic and the GBEI 5650 is both the origination and termination point for HDLC encapsulation HDLC CRC 16 verification is perform...

Страница 27: ...legacy modems a OM 73 V b MD 1352 P U BEM 7650 c MD 1340 OM 73 interoperable mode only orderwire not required d MD 1030B e SLM 3650 f SLM 8650 g SLM 7650 Note The remote control protocol will not be b...

Страница 28: ...lation with all comprehensive BER measurements Summary Faults Reported via Front Panel LEDs 9 pin D sub Alarm connector relay contacts for Tx Rx Common equipment faults and Tx and RX alarms Open colle...

Страница 29: ...selectable Input Return Loss 14 dB 70 140 MHz 9 dB L Band Buffer Clock INT Tx Terrestrial Rx Satellite Doppler Buffer 32 to 4 194 304 bits selectable in bits or mSec Coding Options Uncoded 1 1 Viterb...

Страница 30: ...64 kbps and 128 kbps the maximum reacquisition time shall be 45 seconds For baseband data rates between 128 kbps and 1544 kbps the maximum reacquisition time shall be 20 seconds For baseband data rat...

Страница 31: ...PSK or OQPSK modulation in the MIL STD 188 165A compatible mode SLM 5650 BER vs Eb N0 performance with differential encoding and data scrambling enabled will not exceed values shown in Table 1 4 witho...

Страница 32: ...Compatible Mode Performance When operating in the IESS 310 Compatible Mode SLM 5650 BER vs Eb N0 performance is as specified in IESS 310 1 8 3 6 16 QAM Coding Mode Performance The SLM 5650 operating...

Страница 33: ...Rate 3 4 Rate 7 8 Rate Uncoded 10 3 3 8 5 0 6 3 10 4 4 7 5 9 7 1 10 5 5 3 6 6 7 8 10 8 10 6 5 9 7 2 8 4 11 6 10 7 6 5 7 8 9 0 12 4 10 8 7 1 8 3 9 5 13 0 1 8 3 8 2 BPSK QPSK Offset QPSK BER Performanc...

Страница 34: ...d Reed Solomon Table 1 7 applies to 8 PSK with trellis decoder and reed solomon rates Table 1 7 8 PSK BER Performance Trellis Decoder with Reed Solomon Eb No dB Specifications Viterbi Decoder BER 2 3...

Страница 35: ...e TPC Decoding Eb No dB Specification BPSK QPSK OQPSK BER 21 44 5 16 21 44 3 4 7 8 17 18 10 6 3 3 2 5 3 3 3 9 4 3 6 8 10 7 3 4 2 8 3 4 4 1 4 4 7 1 10 8 3 5 3 1 3 5 4 3 4 5 7 4 10 9 3 6 3 4 3 6 4 8 4 6...

Страница 36: ...enter frequencies and Es N0 and the BER of the test carrier is measured The change in BER is equal to the change in Eb N0 based on the characterization curve of the test carrier and the amount of Adja...

Страница 37: ...enter frequency where X is the spacing factor and R s is the modulation symbol rate in Hz of the test carrier and R s is the modulation symbol rate in Hz of each adjacent carrier For modulation symbol...

Страница 38: ...SLM 5650 Satellite Modem Revision 2 Introduction MN SLM5650 IOM 1 18 1 9 Dimensional Envelope Figure 1 3 Dimensional Envelope...

Страница 39: ...ining foam spacing for maximum shipping protection CAUTION Do not use any cutting tool that will extend more than 1 into the container and cause damage to the modem To remove the modem Step Procedures...

Страница 40: ...Installation of Side Railings Install optional side railings FP SL0006 as follows Quantity Part Number Description 2 FP SL0006 Side Railings Use standard shop tooling Install the side railings with c...

Страница 41: ...ation can be obtained from Comtech EF Data Customer Support www comtechefdata com 2 Connect the cables to the proper locations on the rear panel 3 Before turning the power switch on become familiar wi...

Страница 42: ...ase T Remote Control EIA 530 J6 25 Pin Female Data Input Output to 20 Mbps HSSI J7 52 Pin Female Data Input Output to 52 Mbps Overhead Data P1 25 Pin Male Not Used Alarms J8 9 Pin Female Form C Alarms...

Страница 43: ...connectors TNC Connector Reference Description Direction Rx J3 52 88 104 176 MHz Receive Input Tx J11 52 88 104 176 MHz Transmit Output 2 3 3 L Band IF Interface Connectors The L Band IF uses standard...

Страница 44: ...n D type female DB25 F This connector conforms to the EIA 530 pin out for EIA 422 operation only Pin Name 1 Ground 14 SD_B 2 SD_A 15 ST_A 3 RD_A 16 RD_B 4 RS_A 17 RT_A 5 CS_A 18 MOD FLT OC 6 DM_A 19 R...

Страница 45: ...13 Ground 38 Ground 14 Not Used 39 Not Used 15 Not Used 40 Not Used 16 Not Used 41 Not Used 17 Not Used 42 Not Used 18 Not Used 43 Not Used 19 Ground 44 Ground 20 Not Used 45 Demod Fault see Note 2 21...

Страница 46: ...ulted NC 4 Rx Alarm common COM 2 Tx Alarm is faulted NO 6 Tx Alarm is not faulted NC 1 Tx Alarm common COM 2 3 8 Auxiliary Connector J9 The auxiliary connector provides TTL open collector faults for t...

Страница 47: ...te connector is a 9 pin subminiature female D connector J6 located on the rear panel of the modem Screw locks are provided for mechanical security of the mating connector The remote connector interfac...

Страница 48: ...eceive Data A Output Rx Data A 17 EIA 422 Receive Data B Output Rx Data B 5 EIA 422 Receive Clock A Output Rx Clk A 18 EIA 422 Receive Clock B Output Rx Clk B 6 EIA 422 Receive Byte Sync A Output Rx S...

Страница 49: ...type fuses 2 5 Ground Connector GND A 10 32 stud on the rear panel of the modem is used for connecting a common chassis ground among all equipment Note The AC power connector provides the safety grou...

Страница 50: ...SLM 5650 Satellite Modem Revision 2 Installation MN SLM5650 IOM 2 12 This page is intentionally left blank...

Страница 51: ...Type Min Max Min Max BPSK 1 1 64 8472 64 10000 BPSK 1 2 64 15000 128 30000 BPSK 3 4 64 22500 85 333 29999 999 BPSK 7 8 64 26250 73 142 30000 QPSK 1 1 64 20000 32 10000 QPSK 1 2 64 30000 64 30000 QPSK...

Страница 52: ...205 4 8 64 20500 93 658 29999 999 BPSK 3 4 220 200 4 8 64 20454 545 93 867 29999 999 BPSK 7 8 126 112 4 8 64 23333 333 82 826 30000 BPSK 7 8 219 201 4 8 64 24092 465 79 692 29999 999 BPSK 7 8 225 205...

Страница 53: ...08 194 178 4 8 16 1544 1778 787 QPSK 1 2 IESS 308 194 178 4 8 16 2048 2328 09 QPSK 1 2 IESS 308 194 178 4 8 16 6312 6975 371 QPSK 1 2 IESS 308 194 178 4 8 16 8448 9303 371 QPSK 1 2 IESS 308 219 201 4...

Страница 54: ...QPSK 3 4 IESS 308 126 112 4 8 16 34368 25872 QPSK 3 4 IESS 308 208 192 4 8 16 1544 1216 472 QPSK 3 4 IESS 308 208 192 4 8 16 2048 1582 222 QPSK 3 4 IESS 308 208 192 4 8 16 6312 4676 583 QPSK 3 4 IESS...

Страница 55: ...088 571 QPSK 7 8 IESS 308 126 112 4 8 16 2048 1412 571 QPSK 7 8 IESS 308 126 112 4 8 16 6312 4153 714 QPSK 7 8 IESS 308 126 112 4 8 16 8448 5526 857 QPSK 7 8 IESS 308 126 112 4 8 16 32064 20708 571 QP...

Страница 56: ...7 6545 449 QPSK 3 4 IESS 309 194 178 4 8 16 64 8448 49 602 6547 464 QPSK 3 4 IESS 309 225 205 4 8 16 64 8448 49 951 6593 561 QPSK 3 4 IESS 309 208 192 4 8 16 64 8448 49 541 6539 378 QPSK 7 8 None Off...

Страница 57: ...64 8448 49 587 6545 449 OQPSK 3 4 IESS 309 194 178 4 8 16 64 8448 49 602 6547 464 OQPSK 3 4 IESS 309 225 205 4 8 16 64 8448 49 951 6593 561 OQPSK 3 4 IESS 309 208 192 4 8 16 64 8448 49 541 6539 378 O...

Страница 58: ...98 QPSK 1 2 None Off N A 64 30000 64 30000 QPSK 1 2 None 219 201 4 8 16 64 27534 246 69 371 29999 999 QPSK 1 2 IESS 309 Off N A 64 8448 68 267 9011 2 QPSK 1 2 IESS 309 219 201 4 8 16 64 8448 74 38 981...

Страница 59: ...IESS 308 219 201 4 8 16 32064 17563 701 8 PSK 2 3 IESS 308 219 201 4 8 16 34368 18818 866 8 PSK 2 3 IESS 308 219 201 4 8 16 44736 24467 104 Table 3 7 Turbo Code Mode Modulation Type Data Rate kbps Sym...

Страница 60: ...one 256 51840 85 333 17280 16 QAM 3 4 219 201 4 8 16 256 51840 92 975 18827 462 16 QAM 3 4 208 192 4 8 16 256 51840 92 889 18810 16 QAM 7 8 None None 256 51840 73 143 14811 428 16 QAM 7 8 219 201 4 8...

Страница 61: ...tion is that the receive data will slip as the clocks will not be synchronized If the buffer is properly set up the slips will be an exact frame length causing minimum loss of data By using very high...

Страница 62: ...HIGH STABILITY OSCILLATOR SATELLITE SATELLITE CLOCK RECOVERY BUFFER DATA CLOCK RD BUFFER CLOCK TX TERRESTRIAL MASTER BUFFER CLOCK TX TERRESTRIAL CLOCK RECOVERY BUFFER HIGH STABILITY OSCILLATOR INTERNA...

Страница 63: ...HIGH STABILITY OSCILLATOR SATELLITE SATELLITE CLOCK RECOVERY CLOCK RECOVERY BUFFER RD RD BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK RX SATELLITE CLOCK MASTER DTS DTS NOTE TERRESTRIAL EQUIPMENT MUST RECO...

Страница 64: ...traffic is too slow an occasional bit will be repeated Doppler buffer of the signal of the satellite The Doppler shift results from the figure 8 Figure 3 4 station keeping movement performed by the s...

Страница 65: ...BIT 6 BIT 7 BIT 1 BIT 2 BIT 3 BIT 5 BIT 6 BIT 7 ERROR INTERFACE 1 INCOMING TRAFFIC TOO FAST BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 1 BIT 2 BIT 3 BIT 3 BIT 4 BIT 5 BIT 6 ERROR INTERFACE 2 INCOMING TR...

Страница 66: ...ION KEEPING IS LIMITED TO PRODUCE A MORE INCLINED ORBIT THUS PROLONGING THE LIFE OF THE SATELLITE A SATELLITE IS MAINTAINED AT AN ASSIGNED GEOSTATIONARY LOCATION THROUGH THE USE OF GROUND COMMAND ADJU...

Страница 67: ...to a figure 8 as the angle of inclination increases The orbit of the satellite can result in a peak to peak altitude variation of 2 85 km while the station keeping of a newly launched satellite will...

Страница 68: ...will fill up with data using the clock from the satellite and will empty using the local clock The object of the buffer is to ensure that the buffer overflows or underflows at regular determinable in...

Страница 69: ...e length of 256 bits with 16 frames per multiframe 4096 bits total or 2 ms 3 6 1 Multiples of the Frame Length If this setting is set to NONE the user can choose any buffer depth 3 6 2 Total Buffer Le...

Страница 70: ...__________________________________________________________ ______________________________________________________________________________ ______________________________________________________________...

Страница 71: ...ncluding the menus and their explanations and clocking information For information about remote control operation refer to Appendix B 4 1 Front Panel The modem front panel Figure 4 1 enables the user...

Страница 72: ...array for manual data entry 8 LEDs to provide overall status at a glance On Off Power switch USB Port All functions are accessible at the front panel by entering one of six predefined Function Select...

Страница 73: ...s Orange A Rx Traffic Alarm exists Rx Status Red A Rx Fault exists Green Transmitter is currently on This indicator reflects the actual condition of the transmitter as opposed to the programmed condit...

Страница 74: ...ese keys are used to move to the next selection or to move the cursor for certain functions i and j These keys are used primarily to change configuration data numbers but are also used at times to mov...

Страница 75: ...Settings Target Settings Carrier Loss Action Ref 4 3 1 5 Internal Ext 1 MHz Ext 5 MHz Ext 10 Mhz Mask 4 3 1 6 TxData RxData Eb No Threshold Reset 4 3 1 7 Remote 4 3 1 8 Local Remote Monitor 4 3 2 Alar...

Страница 76: ...ing selections are available Configure Permits the user to fully configure the modem Monitor Permits the user to monitor the alarm status of the unit to view the log of stored events and to display th...

Страница 77: ...rs if the modem type has been set to AUPC Ref Permits the user to configure the modem reference Mask Permits the user to mask selected alarms Reset Permits the user to reset the modem to a default sta...

Страница 78: ...ns Turbo Product Code which is a block code Trellis operation is supported in IESS 310 mode and MIL STD 188 165A mode which for the encoder is just a specific mapping of the constellation Trellis is n...

Страница 79: ...nteractions need to be taken into account If the modulation type selected is 8 PSK or 16 QAM the minimum data rate allowed is 256 kbps When changing certain parameters like modem type the data rate wi...

Страница 80: ...rate and overhead and will not allow an IF frequency to be entered if the occupied bandwidth falls outside of the minimum or maximum IF frequencies Select CONFIG Transmit Power State Permits the user...

Страница 81: ...CONFIG Transmit Misc Select Clk DataPhase or BitOrdering then press E ClkPhase DataPhase Tx Clock Phase Normal or Inverted Tx Data Phase Normal or Inverted BitOrdering Tx Bit Ordering for BPSK compati...

Страница 82: ...ture Phase Shift Keying OQPSK stands for Offset Quadrature Phase Shift Keying 8 PSK stands for 8 Phase Shift Keying 16 QAM stands for 16 Quadrature Amplitude Modulation Rate Viterbi 1 2 2 3 3 4 5 6 or...

Страница 83: ...changing certain parameters like modem type the data rate will default to 64 kbps or 256 kbps The calculated symbol rate is displayed for the user This is helpful for determining the occupied bandwid...

Страница 84: ...tion type code rate and overhead and will not allow an IF frequency to be entered if the occupied bandwidth falls outside of the minimum or maximum IF frequencies Select CONFIG Receive Acquisition Edi...

Страница 85: ...te is 1544 kbps T1 2048 E1 6312 kbps T2 or 8448 kbps E2 then the selected framing card will be used to calculate the required buffer size so that the buffer will slip properly T1 G704 or None E1 G704...

Страница 86: ...AUPC This mode allows Automatic Uplink Power Control to be used Frequency Band Permits the user to select 70 140 MHz 52 88 MHz 104 176 MHz L Band 950 2000 MHz Interface Permits the user to select EIA...

Страница 87: ...e remote modem loses carrier detect Hold Nominal Maximum Select Configuration AUPC Remote Select either Enable BasebandL or Tx Pattern then press E Enable Allows the user to view or modify the status...

Страница 88: ...ks the internal reference to the 10 MHz 4 3 1 6 Select CONFIG Mask TxData Permits the user to select Masked Activity or AIS this alarm monitors data activity on the transmit data interface RxData Perm...

Страница 89: ...Remote Permits the user to select Remote which will enable remote control Further selections under remote include Serial or Ethernet Select CONFIG Remote Remote Select Serial or Ethernet by using efar...

Страница 90: ...lays 0000 Addressing is not supported by RS 232 or TTL Switch because they are not a multi drop communication standards If RS 485 is selected the display will show address 0001 This address can be cha...

Страница 91: ...ontrol Communities or Traps GigaBit Interface Address Range Permits the user to set the Gigabit Ethernet interface s management IP address and subnet mask range IMPORTANT For the address fields the va...

Страница 92: ...er buffer overflow status Doppler buffer underflow status Doppler buffer Phase Lock Loop status Doppler buffer reference clock activity status Receive data interface AIS alarm indication signal status...

Страница 93: ...character was selected Select Monitor Alarms Receive Demod 1st Position If Demod 1st character is selected Select Monitor Alarms Receive Intf 1st Position If Intf 1st character is selected Select Moni...

Страница 94: ...All Permits the user to clear all stored faults IMPORTANT To view the details of a stored fault select an event number by pressing enter Then scroll through the listed faults for a description of the...

Страница 95: ...r fill status in a percentage format Eb No Permits the user to view the estimated Eb No of the received carrier The range is threshold to 20 dB Eb No BER Permits the user to view the estimated BER bas...

Страница 96: ...o the demodulator inside the modem to verify transmit and receive configurations match as well as the data inputs and outputs I O1 means baseband loopback which will loop the transmit data after the i...

Страница 97: ...11 stretched an additional 39 bits to create a lack of transitions for 50 bits approximately every 10 000 bits A pseudo random data pattern of 2 11 1 compatible with standard BERT s ErrIns Permits the...

Страница 98: ...or to counteract aging The control value is in hex not decimal and has a range of 000 to FFF The typical cal point for a modem is nominally around 400 ID Permits the user to give the communications li...

Страница 99: ...level 4 3 4 1 Select Utility Firmware Information Permits the user to select and view information on the firmware and software used by the modem Bootrom Displays the release date The Firmware number a...

Страница 100: ...D 01 11 05 1 1 5c The bulk is the sum of all the individual pieces App FW 11187D 01 11 05 1 1 5c M C FW 11185 10 13 05 1 1 1 Mod FW 11179 10 13 05 1 1 1 Demod FW 11181A 11 07 05 1 1 2 Decoder FW 11182...

Страница 101: ...elect Utility FAST Configuration View Options Options This will list the options that the modem supports and identifies if they are enabled There are 14 options listed 01 14 01 Modem Data Rate 5 Mbps...

Страница 102: ...tions one is to keep a fixed image from burning the screen and the second is to provide a running status of the modem by scrolling the information sideways This function supports seven different statu...

Страница 103: ...s that are more complicated are beyond the scope of this manual The system checkout consists of test instructions for the interface PCB modem PCB TURBO PCB and L Band IF PCB The instructions include t...

Страница 104: ...NECTORS BER TEST SET TX IF RX IF BERT MODEM UNDER TEST Figure 5 1 Fault Isolation Test Setup Notes 1 Ensure the correct data and IF interface is selected and configured for the proper mode of operatio...

Страница 105: ...ce the demodulator has locked to the incoming signal the Monitor Rx Params menu will display frequency offset signal level BERT data if enabled buffer status Eb N0 and corrected BER 6 Connect a spectr...

Страница 106: ...6 6 10 0 9 5 9 5 9 5 7 8 9 5 7 1 10 5 10 1 10 1 10 1 8 3 10 1 7 7 11 0 10 6 10 6 10 6 8 9 10 6 8 2 11 5 11 2 11 2 11 2 9 4 11 2 8 8 12 0 11 7 11 7 11 7 10 0 11 7 9 3 12 5 12 2 12 2 12 2 10 5 12 2 9 8...

Страница 107: ...0 kHz VB 10 0 Hz SPAN 1 000 MHz ST 30 00 sec Modem Rate 2144kbit s 3 4 Rate Coding with 7 7 dB Eb No S N N 10 dB Figure 5 2 Typical Output Spectrum with Noise ATTEN 10 dB 5 00 dB DIV CENTER FREQUENCY...

Страница 108: ...ake several seconds b When the GREEN IF and Data Lock LED are ON and any fault has been cleared where applicable the modem will run at the specified error rate c Run the Rx power level input amplitude...

Страница 109: ...SLM 5650 Satellite Modem Revision 1 Maintenance MN SLM5650 IOM 5 7 PC version IQ monitor with noise Oscilloscope WITH NOISE Figure 5 4 Typical Constellation Patterns with Noise and without Noise...

Страница 110: ...5650 Satellite Modem Revision 1 Maintenance MN SLM5650 IOM 5 8 PC version IQ monitor WITHOUT NOISE Oscilloscope WITHOUT NOISE Figure 5 4 Typical Constellation Patterns with Noise and without Noise Co...

Страница 111: ...d If possible replace the faulty PCB and return the damaged board to the Comtech EF Data Customer Support Department for repair If not return the complete modem The fault isolation procedure lists the...

Страница 112: ...MN SLM5650 IOM 5 10 System faults are reported in the Monitor Alarms menu and stored faults are reported in the Monitor Event Log menu To determine the appropriate action for repairing the modem refer...

Страница 113: ...X TX INTF CLOCK ACTIVITY YELLOW X X TX INTERFACE SCT PLL RED X X X TX INTERFACE DATA AIS YELLOW X DEMODULATOR FAULTS NONE GREEN DEMOD CARRIER LOCK RED X X X DEMOD DECODER LOCK RED X X X DEMOD SYNTHESI...

Страница 114: ...N RED X X EXTERNAL REF ACTIVITY YELLOW X X 192 MHZ CLOCK PLL X RED X X 10 MHZ REF PLL X RED X X M C FPGA CONFIG X RED X X MOD FPGA CONFIG X RED X X DEMOD FPGA CONFIG RED X X DECODER FPGA CONFIG RED X...

Страница 115: ...ault indicated by a front panel LED could be one of many faults Use the Fault or Stored Fault front panel menu to determine which fault has occurred Alarms are considered minor faults Alarms are shown...

Страница 116: ...___________________________________________ _____________________________________________________________ _____________________________________________________________ ________________________________...

Страница 117: ...h the vast majority of existing modems from other manufacturers The SLM 5650 also provides the capability to disable all FEC allowing the modem to run uncoded Turbo Coding represents a very significan...

Страница 118: ...n error rate but doubles the transmitted data rate and hence doubles the occupied bandwidth of the signal Rate 7 8 coding at the other extreme provides the most modest improvement in performance but o...

Страница 119: ...rder to be processed correctly the data must be framed and de framed Additionally R S codes are limited in how well they can correct errors that occur in bursts This unfortunately is the nature of the...

Страница 120: ...able A 2 Open Network Modes Code Rate Mode 219 201 126 112 IESS 308 Standard Lower Rates 225 205 219 201 194 178 IESS 308 Standard Upper Rates 225 205 219 201 208 192 194 178 126 112 IESS 308 Extended...

Страница 121: ...g and decoding schemes However the decoding scheme was seen as complex and expensive and Qualcomm Inc developed a variation on the theme which uses a Viterbi decoder at the core surrounded by adjunct...

Страница 122: ...ec with a primary FEC codec Turbo Product Coding is an entirely stand alone method It does not require the complex interleaving de interleaving of the R S approach and consequently decoding delays are...

Страница 123: ...nication there are two separate isolated independent differential mode twisted pairs each handling serial data in different directions It is assumed that there is a controller device a PC or dumb term...

Страница 124: ...l data is transmitted as asynchronous serial characters suitable for transmission and reception by a UART In this case the asynchronous character formats include 7O2 7E2 and 8N1 The baud rate may vary...

Страница 125: ...4 characters ASCII code 47 1 character 3 characters or ASCII code 61 63 33 or 42 1 character From 0 to n characters Carriage Return Line Feed ASCII code 13 10 2 characters Example 0654 RSW 32 CR LF Ea...

Страница 126: ...ly upper case alphabetic characters may be used A Z ASCII codes 65 90 B 5 4 Instruction Code Qualifier This is a single character which further qualifies the preceding instruction code Code Qualifiers...

Страница 127: ...CII code 33 If the controller sends an instruction code which the target does not recognize the target will acknowledge the message by echoing the invalid instruction followed by the character with Ex...

Страница 128: ...C B 36 MOM B 7 MRC B 19 MSK B 29 N NUE B 28 NUS B 29 P PAT B 21 R RBM B 19 RBO B 18 RBS B 19 RCB B 22 RCI B 18 RCK B 19 RCL B 34 RCR B 15 RCW B 16 RDD B 17 RDI B 18 RDF B 18 RDR B 15 RDS B 17 REA B 19...

Страница 129: ...309 4 IESS 310 5 TURBO 6 16QAM 7 AUPC Example MOM 0 sets OM 73 operating mode MOM MOM MOM MOM MOM MOM x see description of arguments Modem RF Band RFB 1 byte value 0 or 1 Command or Query Modem RF Ba...

Страница 130: ...lution 100Hz Example TFQ 0140 9872 TFQ TFQ TFQ TFQ TFQ TFQ xxxx xxxx see description of arguments Tx Overhead Type TFM 1 byte value of 0 thru 2 4 Command or Query Tx Overhead Type where 0 None Unframe...

Страница 131: ...TFT TFT TFT TFT TFT x see description of arguments Tx Modulation Type TMD 1 byte value of 0 thru 4 Command or Query Tx Modulation type where 0 BPSK 1 QPSK 2 OQPSK 3 8PSK 4 16QAM Depending on FEC type...

Страница 132: ...of arguments Tx Reed Solomon Encoding TRS 1 byte value of 0 or 1 Command or Query Tx RS encoding 0 Off 1 On Depending on Modem mode not all of these selections will be valid Example TRS 0 RS encoding...

Страница 133: ...on t care if RS is Off under TRS TRD TRD TRD TRD TRD TRD x see description of arguments Tx Spectrum Invert TSI 1 byte value of 0 or 1 Command or Query Tx Spectrum Invert selection where 0 Normal 1 Tx...

Страница 134: ...DE TDE TDE x see description of arguments Tx Power Level TPL 5 bytes Command or Query Tx Output power level where s sign xx x Tx Output power level 10 0 and 40 0 dBm Example TPL 13 4 TPL TPL TPL TPL T...

Страница 135: ...rt TDI 1 byte value of 0 or 1 Command or Query Invert Transmit Data where x Invert Transmit Data where 0 Normal 1 Inverted Example TDI 1 selects Inverted TX Data TDI TDI TDI TDI TDI TDI x see descript...

Страница 136: ...O TXO TXO TXO x see description of arguments Rx Frequency RFQ 9 bytes Command or Query Rx Frequency 52 to 88 MHz 104 to 176 MHz and 950 MHz to 2000 MHz Resolution 100Hz Example RFQ 0140 9872 RFQ RFQ R...

Страница 137: ...e description of arguments Rx FEC Code Rate RCR 1 byte value of 0 thru 8 Command or Query Rx FEC Code Rate where 0 1 1 Uncoded 1 1 2 2 3 4 3 7 8 4 2 3 5 5 6 6 21 44 7 5 16 8 17 18 Depending on FEC typ...

Страница 138: ...ode Word RCW 1 byte value of 0 to 5 Command or Query Rx RS encoding 0 RS 225 205 10 1 RS 219 201 9 2 RS 208 192 8 3 RS 194 178 8 4 RS 126 112 7 5 RS 220 200 10 Depending on Modem mode overhead type an...

Страница 139: ...Query Rx Scrambler state where 0 Off 1 OM 73 Scrambler 2 V 35 Scrambler 3 Modified V 35 EFData Closed Network 4 Reed Solomon Synchronous Scrambler 5 IBS Overhead Synchronous Scrambler 6 TURBO Scrambl...

Страница 140: ...erted Example RDI 1 selects Inverted RX Data RDI RDI RDI RDI RDI RDI x see description of arguments Rx Data Fault RDF 1 byte value of 0 thru 2 Command or Query Receive Data Fault where x Receive Data...

Страница 141: ...y valid with the G 703 Option Card Example RCK 2 selects Tx Terrestrial RCK RCK RCK RCK RCK RCK x see description of arguments Rx Buffer Programming Mode RBM 1 byte value of 0 or 1 Command or Query Rx...

Страница 142: ...uments Carrier Only Test Modes COM 1 byte value of 0 thru 2 Command or Query Test Mode where 0 Normal Mode no test 1 Tx CW 2 Tx Alternating 1 0 Pattern Example COM 1 CW Mode COM COM COM COM COM COM x...

Страница 143: ...bytes are the value Last two bytes are the exponent Returns 0 0E00 if the BERT is not synchronized to a pattern Example BBR 4 9E12 N A BBR BBR a bEcc see description of arguments BERT Pattern PAT 1 b...

Страница 144: ...ration from Configuration Memory location defined by the one byte argument 0 to 9 Example CLD 4 retrieve modem configuration from location 4 CLD CLD CLD CLD N A N A ReCenter Buffer RCB None Command on...

Страница 145: ...y Unit returns the value of the Rx signal level in dBm between 10 0 and 60 0 dBm in the form sxx x Examples RSL 10 0 RSL 60 0 N A RSL RSL sxx x see description of arguments Rx Frequency Offset N A 5 b...

Страница 146: ...y zz Bulk1 xx yy zz Bulk2 xx yy zz Example SWR Boot 01 01 01 Bulk1 01 01 01 Bulk2 01 01 01 N A SWR SWR Boot xx yy zz Bulk1 xx yy zz Bulk2 xx yy zz see description of arguments Software Image IMG 1 byt...

Страница 147: ...b FEC Card 1 0 None 1 TPC c FEC Card 2 0 None 1 TPC d Option Card 0 None 1 G 703 e Data Rate Option 0 Base 10 000 kbps 1 up to 20 kbps 2 up to 51840 kbps 3 up to 155 000 kbps 4 up to 200 000 kbps f H...

Страница 148: ...00 3 3V Power 20000000 2 5V Power 10000000 1 5V Power 08000000 12V Power 04000000 12V Power 02000000 18V Power 01000000 Cooling Fan 00800000 Ext Reference Activity 00400000 192 MHz Clock not locked 00...

Страница 149: ...t locked 01000000 Interface No Data Activity Example TXF 00000000 indicates No Tx Faults N A TXF TXF xxxxxxxx see description of arguments Live Rx Faults N A 8 bytes Query only Live Rx Faults are retu...

Страница 150: ...nit returns the oldest 5 Stored Events which have not yet been read over the remote control Reply format CR Sub body CR Sub body CR Sub body CR Sub body CR Sub body where Sub body Axxxxxxxxddmmyyhhmms...

Страница 151: ...escription of arguments Statistics Sample Interval SSI 1 byte Command or Query Used to set the sample interval for the Statistics Logging Function SSI x where x 0 to 9 in 10 minute steps Note Setting...

Страница 152: ...ub body CR Sub body CR Sub body CR Sub body where Sub body AA ABB Bddmmyyhhmmss AA A Minimum Eb No during sample period BB B Average Eb No during sample period If there are less than 5 events to be re...

Страница 153: ...Code where 0 AMI 1 B8ZS 2 B6ZS 3 HDB3 Example TTC 3 Set Tx Ternary Code to HDB3 TTC TTC TTC TTC TTC TTC x see description of arguments Rx Ternary Code RTC 1 byte value of 0 thru 3 Command or Query Rx...

Страница 154: ...04 3 G 743 5 G 747 Example T2F 0 T2F T2F T2F T2F T2F T2F x see description of arguments Receive E2 Framing E2F 1 byte value of 0 1 2 or 4 Command or Query Receive E2 Framing where 0 None 1 G 704 2 G 7...

Страница 155: ...and Qualifier Response to Query AUPC Local Enable LPC 1 byte value of 0 or 1 Command or Query Local AUPC Control where 0 Off 1 On NOTE When Local AUPC Control is enabled modulator output power is auto...

Страница 156: ...of arguments AUPC Maximum Tracking Rate AMT 3 bytes Command or Query AUPC Maximum Tracking Rate where x x Maximum Tracking Rate 0 5 to 6 0 dBm minute in increments of 5 Example AMT 0 5 AMT AMT AMT AMT...

Страница 157: ...x Pattern Substitution where 0 Off 1 On NOTE For compatibility reasons only the 2047 Tx pattern can be turned On or Off at the remote modem Example RPB 1 Turn on remote modem AUPC Control RPB RPB RPB...

Страница 158: ...eee Modem Alarm Mask same as MSK f Carrier Only Test Modes same as COM g Loopback Test Modes same as LOP h Tx BERT State same as BTX i Rx BERT State same as BRX j BERT Pattern same as PAT kkkkkkkk exp...

Страница 159: ...ata Rate same as RDR MMMM MMMM Rx Frequency same as RFQ N Rx Overhead Type same as RFM OOO Reserved P Rx Reed Solomon state same as RRS Q Rx Reed Solomon code word same as RCW R Rx Reed Solomon interl...

Страница 160: ...ing same as T2F K Receive E2 Framing same as E2F L External Buffer Clock Reference same as ERF M AUPC Local Enable same as LPC NNN N AUPC Nominal Power Level same as ANP OOO O AUPC Maximum Power Level...

Страница 161: ...mote Control MN SLM5650 IOM B 39 Note The following codes are used in the Response to Command column Message ok Received ok but invalid arguments found Message ok but not permitted in current mode Mes...

Страница 162: ...SLM 5650 Satellite Modem Revision 1 Remote Control MN SLM5650 IOM B 40 This page is intentionally left blank...

Страница 163: ...t E mail or on disk The upgrade can be performed without opening the unit by simply connecting the modem to the Ethernet port of a computer C 1 Ethernet FTP upload procedure 1 Identify the reflashable...

Страница 164: ...first then by firmware number make sure you know the correct firmware number see step 1 version if applicable and release date The base modem bulk firmware for the SLM 5650 will be FW11188 _ _ where...

Страница 165: ...ftp xxx xxx xxx xxx where xxx xxx xxx xxx is the IP address of the SLM 5650 b Enter your admin user name and password to complete login Factory Default user is COMTECH Password is COMTECH c Verify you...

Страница 166: ...0 Satellite Modem Revision 1 Reflash MN SLM5650 IOM C 4 10 Verify the new software versions are booting by observing the following messages on the modem display Comtech SLM 5650 Modem Firmware Version...

Страница 167: ...d references other chapters for further details D 2 Ethernet Management Interface Protocols The modem 10 100BaseT Ethernet Management Interface supports three 3 different management protocols Web Serv...

Страница 168: ...et Explorer 5 5 or higher By typing http xxx xxx xxx xxx where xxx xxx xxx xxx Base Modem IP address on your browser the Login prompt will appear HTTP Login Access Levels are defined as follows User L...

Страница 169: ...MN SLM5650 IOM D 3 D 4 Web Server Menu Tree Table D 1 Web Server Menu Tree Level 1 Level 2 Home Home Contact Support Admin Access Remote Config Mdm Page 1 Page 2 AUPC Stats Modem Status Modem Logs OD...

Страница 170: ...agement of a particular function A MIB file is a tree of nodes that is unique to a particular device There are three MIB files associated with the SLM 5650 MIB File Name Description fw10874 2 mib Comt...

Страница 171: ...fines three Community Strings for SNMP access Read Community default public Write Community default private Trap Community default comtech Note Maximum number of characters for community strings shall...

Страница 172: ...and Faults SNMPv2 notifications slm5650UnitAlarmV2 1 3 6 1 4 1 6247 28 2 1 1 slm5650TxTrafficAlarmV2 1 3 6 1 4 1 6247 28 2 1 2 slm5650RxTrafficAlarmV2 1 3 6 1 4 1 6247 28 2 1 3 slm5650RedundancyState...

Страница 173: ...pture below shows the login process COMTECH EF DATA SLM 5650 TELNET INTERFACE Once logged into the Telnet interface as the Administrator the user can access the standard remote control interface defin...

Страница 174: ...xample FRW response will be displayed as one line with the latter lines overwriting the previous lines In order to view the full response messages CEFD recommends using HyperTerminal configured as Tel...

Страница 175: ...SLM 5650 Satellite Modem Revision 1 Ethernet Management MN SLM5650 IOM D 9 COMTECH EF DATA SLM 5650 TELNET INTERFACE...

Страница 176: ...SLM 5650 Satellite Modem Revision 1 Ethernet Management MN SLM5650 IOM D 10...

Страница 177: ...ase T remote port of the modem The GbE Interface is 10 100 1000 Base T and supports data rates from 1 Mbps to 155 Mbps IP traffic entering the GbE Interface is encapsulated in HDLC protocol for transm...

Страница 178: ...st distributed or IPV4 Signal Types Serial data Voltage Level Per IEEE 802 3ab Packet Latency 50 ms maximum Flow Control None Cable Length Maximum 100 meters CAT 5 cable patch cords and connecting har...

Страница 179: ...ress Rx errors Ingress Frame Check Sequence Errors Egress oclets Egress unicast packets Egress broadcast packets Egress multicast packets HDLC link errors Rx packet count Tx packet count Management Po...

Страница 180: ...or wired Table E 2 Connector Pinout Pin Description Direction 1 BI_DA bidirectional 2 BI_DA bidirectional 3 BI_DB bidirectional 4 BI_DC bidirectional 5 BI_DC bidirectional 6 BI_DB bidirectional 7 BI_D...

Страница 181: ...t GbE Interface Card Removal of the Interface Card Steps Procedures 1 Turn power to the modem off 2 Disconnect the RJ 45 cable from the interface card 3 Remove the two screws securing the interface ca...

Страница 182: ...SLM 5650 Satellite Modem Revision 1 CDI 70 Gigabit Ethernet Interface MN SLM5650 IOM E 6 This page is intentionally left blank...

Страница 183: ...2 Clock Slip 3 15 Clocking Options 3 11 Closed Networks 1 5 Concatenated RS Coding Summary A 5 Configuration 3 1 Connector Pinout E 4 Converting Between Bits and Seconds 3 19 D Data Interfaces 1 5 Dat...

Страница 184: ...Networks INTELSAT 1 5 Opening Screen 4 6 Operating Modes 1 5 Optional Installation of Side Railings 2 2 Optional Installation Using a Typical Customer Rack 2 3 Options 1 3 A 1 Overhead Data P1 2 10 P...

Страница 185: ...1000 Base T GbE Interface E 1 16 QAM BER Performance Viterbi Decoder and Reed Solomon 1 14 16 QAM Mode 3 10 16 QAM Coding Mode Performance 1 12 70 140 IF Interface Connectors 2 5 8 PSK TCM Coding Summ...

Страница 186: ......

Страница 187: ...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 0...

Страница 188: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...

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