Comtech EF Data SDM-9000 Installation And Operation Manual Download Page 149

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SDM-9000 Satellite Modem

Theory of Operation

Rev.4

5–21

5.5.3 Theory of Operation

The Interface PCB consists of the following basic subsections:

•

TX terrestrial receivers (data and clock)

•

RX terrestrial drivers (data and clock)

•

TX overhead MUX (ESC optional)

•

TX overhead receivers and processor

•

RX overhead DEMUX (ESC optional)

•

RX overhead processor and drivers

•

Baseband loopback relays

•

Interface loopback MUX

•

Plesiochronous buffer (optional)

•

Buffer clock MUX

•

Modem fault/alarm relays

•

Modem fault TTL outputs

•

Backward alarms (ESC optional)

•

Local monitor and control processor

Refer to Figure 5-6 for the interface block diagram.

Summary of Contents for SDM-9000

Page 1: ...Part Number MN SDM9000 IOM Revision 4 SDM 9000 Satellite Modem Installation and Operation Manual...

Page 2: ......

Page 3: ...IDR With IDR 8PSK 8PSK 16QAM 16QAM 8PSK 8PSK 16QAM 16QAM BER 2 3 Rate 5 6 Rate 3 4 Rate 7 8 Rate 2 3 Rate 5 6 Rate Rate 7 8 Rate 10 6 6 1 dB 8 2 dB 8 3 dB 9 8 dB 6 5 dB 8 6 dB 8 7 dB 10 2 dB 10 7 6 4...

Page 4: ...10 7 10 9 10 8 10 10 3 0 4 0 5 0 6 0 Eb N0 dB 7 0 8 0 9 0 10 0 11 0 10 2 2 3 RATE SPECIFICATIONS 5 6 RATE 8 Mbit s 8PSK w IDR 8 Mbit s 8PSK w IDR Figure 1 6 8PSK BER Performance Curves with Reed Solo...

Page 5: ...8 Mbit s w IDR Figure 1 7 16QAM BER Performance Curves with Reed Solomon Filename T_ERRATA 3...

Page 6: ...e Form C contact closures for alarm reporting as follows Alarm 1 Not used Alarm 2 TX Alarm 3 RX The two Form C summary fault contacts currently used are Transmit alarm Alarm 2 Receive alarm Alarm 3 Re...

Page 7: ...e 3 2 This information will be incorporated into the next revision Change Specifics 3 2 Modulator The modulator PCB AS 3969 is located in the top slot of the modem chassis The jumper settings are list...

Page 8: ......

Page 9: ...in the USA Comtech EFData 2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 FAX 480 333 2161 SDM 9000 Satellite Modem Installation and Operation Manual Part Number MN SDM9000 IOM Revision 4 Ma...

Page 10: ...port Department at service comtechefdata com Contact us via the web at www comtechefdata com 1 To return a Comtech EFData product in warranty and out of warranty for repair or replacement 2 Request a...

Page 11: ...fications 1 12 1 4 1 Viterbi Decoder BER QPSK 1 12 1 4 2 Reed Solomon Codec BER QPSK 1 14 1 4 3 8PSK and 16QAM Viterbi Decoder and Reed Solomon Codec 1 16 CHAPTER 2 INSTALLATION 2 1 2 1 Unpacking 2 1...

Page 12: ...Procedure 3 11 3 5 2 3 1 Nyquist Filter Removal 3 11 3 5 2 3 2 Nyquist Filter Replacement 3 13 3 6 Software Configuration 3 14 3 6 1 Revision Emulation 3 14 3 6 2 Remote Interface Specification 3 15 3...

Page 13: ...4 3 2 1 TX Timing 4 54 4 3 2 2 RX Timing 4 54 4 3 2 2 1 RX Timing with Buffer 4 54 4 3 2 2 2 RX Timing without Buffer 4 54 CHAPTER 5 THEORY OF OPERATION 5 1 5 1 Display M C 5 1 5 1 1 Description 5 1...

Page 14: ...Fault Isolation 6 13 6 2 1 Guidelines 6 13 6 2 2 System Faults Alarms 6 14 6 2 2 1 Fault Alarm Display and Description 6 18 6 2 2 2 Fault Alarm Analysis 6 19 6 2 2 2 1 Modulator Faults 6 19 6 2 2 2 2...

Page 15: ...Mode SYNC Decoder A 18 A 2 6 SYNC 1 Inversion and Scrambler Descrambler A 19 A 2 6 1 DBS Mode De Scrambler for 204 Byte Packets A 20 A 2 7 Reed Solomon Coder Decoder A 21 A 2 7 1 DBS Mode Check Byte F...

Page 16: ...ve Menu 4 20 Figure 4 7 Configuration Recall Menu 4 21 Figure 4 8 Monitor Menu 4 22 Figure 4 9 Faults Alarm Menu 4 24 Figure 4 10 Stored Faults Alarms Menu 4 32 Figure 4 11 Utility Modulator Menu 4 36...

Page 17: ...r Sequence A 20 Figure A 17 Reed Solomon RS 204 188 8 Error Protected Packet A 21 Figure A 18 Interleaver De interleaver A 23 Figure A 19 Interleaved Frame Structure A 24 Figure A 20 DVB Puncturing A...

Page 18: ...aphing to agree with Table 2 1 Deleted the notes following 2 4 8 1 2 4 8 1 1 2 4 8 2 and 2 4 8 3 Chapter 2 4 8 note references are to the notes listed in 2 4 8 Incorporated tool reference in 3 5 2 3 1...

Page 19: ...ech EFData Specification SP 3965 INTELSAT Earth Station Standards IESS 308 309 Sonnet Specifications STS 1 International Telephone and Telegraph Consultative Committee CCITT V 35 European Broadcasting...

Page 20: ...the EIA designations EIA 232 EIA 485 etc only Military Standards References to MIL STD 188 apply to the 114A series i e MIL STD 188 114A which provides electrical and functional characteristics of th...

Page 21: ...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...

Page 22: ...her warranty is expressed or implied Comtech EFData specifically disclaims the implied warranties of merchantability and fitness for particular purpose Exclusive Remedies The remedies provided herein...

Page 23: ...pter 1 INTRODUCTION This chapter describes the options and provides an overview description and specifications for the SDM 9000 satellite modem referred to in this manual as the modem Figure 1 1 Figur...

Page 24: ...ast DVB 70 140 MHz Duplex DC MIL188 144 with ESC RS H S 10 7 with DVB 70 140 MHz TX DC ECL with Buffer 70 140 MHz RX DC ECL with ESC ECL with Buffer RS PECL with Buffer PECL with ESC PECL with Buffer...

Page 25: ...m features include a Nyquist filter Printed Circuit Board PCB for enabling the user to change data rates at the modulator or demodulator The modem supports up to four channels at the following data ra...

Page 26: ...panel Backplane rear panel The backplane PCB is mounted on the chassis assembly and contains receptacles for three plug in PCBs Modulator Demodulator Interface Test points are located on the front edg...

Page 27: ...SDM 9000 Satellite Modem Introduction Rev 4 1 5 Figure 1 3 SDM 9000 Block Diagram...

Page 28: ...AS 4080 Reed Solomon Daughter Board DVB Standard AS 4524 Refer to Appendix A for more information 1 1 3 2 8PSK 16QAM The 8PSK modulation type is a PSK encoding method for providing a modulated carrier...

Page 29: ...BS mode supports data rates up to 44 736 Mbit s using a single FEC channel Single channel implementation differs significantly from the International Telecommunications Satellite Organisation INTELSAT...

Page 30: ...s DC PL 3978 Motherboard PL 2305 Display Monitor Control No FW included PL 4124 1 Filter Nyquist TX PL 4124 2 Filter Nyquist RX PL 4109 Supply Power AC Alternate PL 4110 Supply Power AC Preferred The...

Page 31: ...ship of the interface card ECL with Reed Solomon Condition ECL P N Reed Solomon IDR STD P N Reed Solomon DVB STD P N Base 4477 11 Buffer 4477 21 ESC 4477 31 Buffer with Reed Solomon 4477 21 4080 4524...

Page 32: ...Mbit s 51 840 Mbit s Elastic Buffer 2 to 32 ms selectable from front panel Digital Data Rate 6 0 to 51 84 Mbit s in 1 bit steps Scrambling Descrambling Types V 35 per CCITT V 35 IDR per IESS 308 EFD...

Page 33: ...RS 485 Baud Rate 110 to 19200 bit s Functions Controlled Transmit Receive frequency Transmit power Transmitter on off Data rate modulation RF IF loopback Baseband Interface loopbacks Scrambler Descra...

Page 34: ...t coding configurations are shown in Table 1 2 All values are for operation in QPSK mode Performance measurements are recorded with transmit and receive IF connected back to back through an additive w...

Page 35: ...e Modem Introduction Rev 4 1 13 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 3 0 4 0 5 0 6 0 Eb N0 dB 7 0 8 0 9 0 10 0 11 0 10 2 1 2 RATE 3 4 RATE SPECIFICATIONS 7 8 RATE Figure 1 4 Viterbi BER Perfor...

Page 36: ...All values are for QPSK mode operation Refer to Figure 1 5 for the Reed Solomon BER curves Table 1 3 Reed Solomon BER Data Specification BER 1 2 Rate 3 4 Rate 7 8 Rate 10 6 4 1 dB 5 6 dB 6 7 dB 10 7...

Page 37: ...odem Introduction Rev 4 1 15 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 3 0 4 0 5 0 6 0 Eb N0 dB 7 0 8 0 9 0 10 0 11 0 10 2 3 4 RATE SPECIFICATIONS 1 2 RATE 7 8 RATE Figure 1 5 Reed Solomon BER Perf...

Page 38: ...6QAM for the BER curves with the Reed Solomon option Table 1 4 8PSK and 16QAM BER Data Specification 8PSK 8PSK 16QAM 16QAM BER 2 3 Rate 5 6 Rate 3 4 Rate 7 8 Rate 10 6 6 1 dB 8 2 dB 8 3 dB 9 8 dB 10 7...

Page 39: ...troduction Rev 4 1 17 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 3 0 4 0 5 0 6 0 Eb N0 dB 7 0 8 0 9 0 10 0 11 0 10 2 2 3 RATE WITH R S 5 6 RATE WITH R S SPECIFICATIONS Figure 1 6 8PSK BER Performanc...

Page 40: ...ite Modem 1 18 Rev 4 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 4 0 5 0 6 0 Eb N0 dB 7 0 8 0 9 0 10 0 11 0 10 2 3 4 RATE WITH R S 7 8 RATE WITH R S SPECIFICATIONS 12 0 Figure 1 7 16QAM BER Performan...

Page 41: ...SDM 9000 Satellite Modem Introduction Rev 4 1 19 A typical spectral occupancy curve is shown in Figure 1 8 Figure 1 8 SDM 9000 Typical Spectral Occupancy...

Page 42: ...Introduction SDM 9000 Satellite Modem 1 20 Rev 4 This page is intentionally left blank...

Page 43: ...t cards are packed in separate cardboard caddypacks also packaged within the cardboard carton CAUTION Do not use any cutting tool that will extend more than 1 into the container and cause damage to th...

Page 44: ...the demodulator PCB AS 3970 should be removed Enter the System Utility menu on the front panel and select Operation mode Enter the menu and select TX only This will mask the RX faults and stored fault...

Page 45: ...e main PCB assemblies Figure 1 2 as follows a Install the modulator PCB AS 3969 in the top slot b Install the interface PCB AS 3971 AS 4477 or AS 5618 in the middle slot c Install the demodulator PCB...

Page 46: ...Installation SDM 9000 Satellite Modem 2 4 Rev 4 Note All dimensions are listed in inches Figure 2 1 SDM 9000 Dimensional Drawing...

Page 47: ...SDM 9000 Rear Panel View Note In order to meet the European EMC Directive EN55022 EN50082 1 properly shielded cables for DATA I O are required These cables must be double shielded from end to end ensu...

Page 48: ...ignal level should be between 25 and 45 dBm The signal frequency of the receive RX IF input is between 50 and 180 MHz 2 4 3 Receive Data CP3 The Receive Data connection is a BNC connector used for the...

Page 49: ...S 232 C or RS 485 Refer to Appendix B for remote control operation information The remote interface connection is a 9 pin female D connector located on the rear panel of the modem Screw locks are prov...

Page 50: ...fault connect all the Form C contacts in parallel The fault interface connection is a 9 pin female D connector located on the rear panel of the modem Screw locks are provided for mechanical security...

Page 51: ...ATA I O pinout will be different for each of the interface configurations The interface pinouts are listed in the following sections Refer to the following Notes for additional data applying to each c...

Page 52: ...30 ADPCM 2 audio input A2I A 47 A2I B 31 ADPCM 2 audio output A2O A 48 A2O B 32 Backward alarm 1 output BWO1 C 8 Note 1 BWO1 NC 25 BWO1 NO 41 Backward alarm 2 output BWO2 C 9 Note 1 BWO2 NC 26 BWO2 N...

Page 53: ...46 30 64 kHz send timing out RS 422 E ST A 47 E ST B 31 64 kbit s receive data out RS 422 E RD A E RD B 48 32 Backward alarm 1 output BWO1 C 8 Note 1 BWO1 NC 25 BWO1 NO 41 Backward alarm 2 output BWO...

Page 54: ...A 45 A1I B 29 ADPCM 1 audio output A1O A 46 A1O B 30 ADPCM 2 audio input A2I A 47 A2I B 31 ADPCM 2 audio output A2O A 48 A2O B 32 Backward alarm 1 output BWO1 C 8 Note 1 BWO1 NC 25 BWO1 NO 41 Backward...

Page 55: ...B 29 ADPCM 1 audio output A1O A 46 A1O B 30 ADPCM 2 audio input A2I A 47 A2I B 31 ADPCM 2 audio output A2O A 48 A2O B 32 Backward alarm 1 output BWO1 C 8 Note 1 BWO1 NC 25 BWO1 NO 41 Backward alarm 2...

Page 56: ...marily used in operating a protection switch The external high stability reference clock input is 5 10 or 20 MHz AGC OUT is the voltage for a receive signal level between 25 and 50 dBm The AUX 1 conne...

Page 57: ...of alarms monitored To obtain a system summary alarm connect all the Form C contacts in parallel The alarms connection is a 9 pin female D connector located on the rear panel of the modem Screw locks...

Page 58: ...ill automatically switch between ranges Maximum power consumption is less than 200W 2 4 12 DC Power The DC power is supplied to the modem by a standard detachable non locking 3 prong power cord IEC pl...

Page 59: ...ws the Display M C card and the jumper locations The jumper settings are listed in Table 3 1 All modem functions can be remotely controlled and monitored via an RS 485 RS 232 C communications link The...

Page 60: ...mote JP9 and JP10 32K 64K 128K 256K 256K 27C256 EEPROM at U17 27C512 EEPROM at U17 27C010 EEPROM at U17 27C020 EEPROM at U17 27C040 EEPROM at U17 Note Pins JP2 and JP3 must be in the 4 wire position f...

Page 61: ...Table 3 2 Figure 3 2 shows the modulator card and the jumper locations Table 3 2 Modulator PCB Jumper Settings Jumper Position Function J7 1 to 2 2 to 3 Normal processor control Output forced ON test...

Page 62: ...jumper settings are listed in Table 3 3 Figure 3 3 shows the demodulator card and the location of jumper JP5 Table 3 3 Demodulator PCB Jumper Settings Jumper Position Function JP5 EEPROM size select...

Page 63: ...RX two 32 kbit s audio channels TX one 64 kbit s data channel while RX two 32 kbit s audio channels TX two 32 kbit s audio channels while RX one 64 kbit s data channel The jumper settings are listed i...

Page 64: ...Configuration SDM 9000 Satellite Modem 3 6 Rev 4 JP1 Figure 3 4 Interface PCB AS 3971...

Page 65: ...SDM 9000 Satellite Modem Configuration Rev 4 3 7 Figure 3 5 Interface PCB AS 4477...

Page 66: ...Configuration SDM 9000 Satellite Modem 3 8 Rev 4 JP1 JP6 JP7 Figure 3 6 Interface PCB AS 5618...

Page 67: ...tor PCB AS 3970 The filters include a factory programmable device that contains Data Rates Coding Rates Symbol Rates Options This information is programmed into the filter PCB at calibration time A la...

Page 68: ...t s in 1 bit s steps 3 5 2 Installation Installation instructions for the field installed Nyquist filters AS 4124 include Unpacking initial inspection Tools required Installation procedure 3 5 2 1 Unp...

Page 69: ...er has three 10 pin connectors for I O and power b Mount the card on the four standoffs with a 1 4 hex nut on each standoff to secure the PCB Tighten each nut using the 1 4 nut driver 2 Refer to Figur...

Page 70: ...Configuration SDM 9000 Satellite Modem 3 12 Rev 4 Figure 3 7 Nyquist Filter Installation...

Page 71: ...tall the TX RX filter card on the three 10 pin connectors Note The TX RX filter cards are keyed for easy installation TX Filter Connectors RX Filter Connectors Filter Modulator Filter Demodulator JP1...

Page 72: ...1 4100 1 Original version 2 2 1 1 4100 1A Software changes 3 3 1 1 4100 1B Software changes 3 3 1 2 4100 1C Correctional Setting 4 4 1 1 4100 1D Software changes 5 5 1 1 4100 1E Software changes 6 6...

Page 73: ...he parity bits can be set to EVEN ODD or NONE with 8 data bits The available baud rates bit s are listed below 110 150 300 600 1200 2400 4800 9600 19200 3 6 2 2 Remote Address To communicate with the...

Page 74: ...r Clock Source RX Satellite Descrambler ON TX Clock Phase Normal Buffer Size 12 ms RX Clock Phase Normal Service Channel TX1 5 dBm Ext Ref Freq 5000 000 kHz Service Channel TX2 5 dBm B Band Loopback O...

Page 75: ...nel The modem front panel Figure 4 1 enables the user to control modem configuration parameters and display the modem status Figure 4 1 SDM 9000 Front Panel View The major front panel features are 32...

Page 76: ...xists in the TX chain RX Red A fault condition exists in the RX chain Common Red A common equipment fault condition exists Stored Yellow A fault has been logged and stored The fault may be active Stat...

Page 77: ...s not available The modem front panel control uses a tree structured menu system Figures 4 2 through 4 16 to access and execute all functions The base level of this structure is the sign on message th...

Page 78: ...TS ALARMS RX INTERFACE Figure 4 9 FAULTS ALARMS COMMON Figure 4 9 FAULTS ALARMS BACKWARD ALARMS Figure 4 9 FUNCTION SELECT STORED FAULTS ALARMS STORED FAULTS ALARMS MODULATOR Figure 4 10 STORED FAULTS...

Page 79: ...r change is required press ENTER to begin the change process Press the arrow keys to change the parameters After the display represents the correct parameters execute the change by pressing ENTER This...

Page 80: ...fixed user total range ON OFF NORMAL OFF CENTER OFFSET DUAL MODULATOR REF INTERNAL EXT 5 MHz EXT 10 MHz EXT 20 MHz Modulator high stability reference option only RS ENCODER ON OFF Reed Solomon option...

Page 81: ...anged the TX is automatically turned off to prevent the possible swamping of other channels To turn the TX on use the IF Output function TX IF OUTPUT Programs the modulator output on or off On entry t...

Page 82: ...sed to check the channel balance and carrier null On entry the Center mode is displayed To activate this test mode press ENTER Press or to select the Dual or Offset modes To return to the Configuratio...

Page 83: ...SDM 9000 Satellite Modem Operation Rev 4 4 9 This page is intentionally left blank...

Page 84: ...ONFIGURATION ON OFF TEST MODE CONFIGURATION 1 0 E 3 to 1 0 E 8 NONE SWEEP RANGE 0 to 120 000 Hz RS DECODER ON CORRECTION_OFF OFF Reed Solomon option only ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPEND...

Page 85: ...for RF loopback operation When RF loopback is turned on the demodulator is programmed to the same frequency as the modulator When RF loopback is turned off the demodulator is tuned to the previous fre...

Page 86: ...ursor Press ENTER to execute the change The smaller the range the faster the modem will lock provided the RX carrier center frequency is within the RX IF frequency sweep range RS DECODER Programs the...

Page 87: ...SDM 9000 Satellite Modem Operation Rev 4 4 13 This page is intentionally left blank...

Page 88: ...lable when buffer installed NORMAL INVERT ECL PECL or MIL STD 188 interface only B BAND LOOPBACK ON OFF INTERFC LOOPBACK ON OFF ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information...

Page 89: ...cute the change BUFFER CLOCK Programs the interface buffer output clock to one of the following modes RX Satellite Internal Clock External Clock TX Terrestrial RX Satellite Mode Sets the buffer output...

Page 90: ...eband signals are also looped back from the TX data and clock to RX data and clock on the customer side of the interface This is a bi directional loopback of the baseband data Refer to Figure 4 19 for...

Page 91: ...crambler is displayed Press or to select ON or OFF Press ENTER to execute the change DESCRAMBLER Programs the descrambler on or off On entry the current status of the descrambler is displayed Press or...

Page 92: ...displayed Press or to select ON or OFF Press ENTER to execute the change RX 2047 PATTERN Test Mode Configuration Option Programs the modem to RX a 2047 pattern as the normal RX data and allows the BE...

Page 93: ...n Save This feature allows the user to program configuration parameters into memory on the M C There are five memory locations that may be used to store specific configuration setups that are used fre...

Page 94: ...N DEPENDENT Parameter Information Key Figure 4 7 Configuration Recall Menu 4 2 1 5 Configuration Recall Once a configuration setup has been saved it may be recalled by entering Configuration Recall On...

Page 95: ...NO DATA if carrier not locked CURRENT Eb N0 Low limit based on data rate High limit 16 0 dB NO DATA if carrier not locked CURRENT RECEIVE LEVEL 25 to 50 dBm CURRENT SWEEP FREQUENCY 60 000 to 60 000 H...

Page 96: ...limit is 1 0 12 Eb N0 Displays the current Eb N0 or No Data if carrier is not locked Range mm m to mm m Note Low limit based on performance High limit is 16 0 dB RX SIGNAL Displays the current RX sign...

Page 97: ...RATION See notes BUFFER UNDERFLOW BUFFER OVERFLOW RX DATA AIS FRAME BER BUFFER CLK PLL BUFFER CLK ACT DEMUX LOCK RX 2047 LOCK BUFFER FULL PROGRAMMING CONFIGURATION See notes BATTERY CLOCK 12 VOLT SUPP...

Page 98: ...onitored fault status is displayed as follows indicates that no fault or alarm exists indicates that a fault exists and will cause switching in a redundant system A reversed contrast indicates an alar...

Page 99: ...y fault Q CHANNEL Q channel data activity fault AGC LEVEL TX IF AGC level fault INTERNAL SCT SYN Internal TX data clock synthesizer fault EXT REF ACT Modulator fault This is only used with the Externa...

Page 100: ...loss of activity in the I channel of the quadrature demodulator Q CHANNEL Q channel activity fault Indicates a loss of activity in the Q channel of the quadrature demodulator DESCRAMBLER Descrambler...

Page 101: ...er data input to the modem When None is selected in the Configuration Interface menu the TX Data AIS Fault Alarm is not activated Note AIS is an alarm not a switching fault TX CLOCK PLL TX phase locke...

Page 102: ...Alarm is not activated Note AIS is an alarm not a switching fault FRAME BER Frame BER fault Indicates that the frame BER exceeds 1 3 BUFFER CLK PLL Buffer clock phase locked loop fault Indicates the b...

Page 103: ...er on off cycle INTERFACE MODULE Interface module fault typically indicates that the interface module is missing or will not program 4 2 3 6 Backward Alarms BW Alarm RX 4 RX backward alarm 4 indicator...

Page 104: ...SDM 9000 Satellite Modem Operation Rev 4 4 31 This page is intentionally left blank...

Page 105: ...ION See notes HH MM SS MM DD YY FAULT LABEL BUFFER UNDERFLOW BUFFER OVERFLOW RX DATA AIS FRAME BER BUFFER CLK PLL BUFFER CLK ACT DEMUX LOCK RX 2047 LOCK BUFFER FULL PROGRAMMING CONFIGURATION See notes...

Page 106: ...n additional common equipment fault is logged Flt1 to indicate the power up time and date The power down and power up times are logged as common equipment fault 0 and common equipment fault 1 respecti...

Page 107: ...Operation SDM 9000 Satellite Modem 4 34 Rev 4 This page is intentionally left blank...

Page 108: ...date Firmware information Test mode status Overhead type Revision emulation Note Changes in the Utility menu may cause changes in other front panel menus A lamp test function is provided for testing...

Page 109: ...re number MM DD YY Month Day Year TX FPGA FIRMWARE FW NNNNNN DDR FW NNNNNN DDR Firmware number MM DD YY Month Day Year ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key FILTE...

Page 110: ...lator options 8PSK and 16QAM High Stability Note This menu is status only MOD POWER OFFSET Modulator power adjust offset Allows the operator to offset the modulator output power readout in the Configu...

Page 111: ...ION DEPENDENT Parameter Information Key RXA QPSK 3 4 32368 000 kbit s RXB QPSK 3 4 RS 34368 000 kbit s Appended RS indicates Reed Solomon calibrated RXC QPSK 3 4 44736 000 kbit s RXD QPSK 3 4 51840 00...

Page 112: ...signments are used for the selection of RX rate in the Configuration Functions menu 2 If the filter is optimized for Reed Solomon RS will be appended to the code rate 3 Refer to the table in Figure 4...

Page 113: ...operation Type 1 Base Type 2 Doppler Buffer Type 3 Doppler Buffer and ESC STATUS ONLY BUFFER ESC RS EFD RS DVB ESC 64K ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key UTIL...

Page 114: ...2064 Framing Structure NONE G 752 34368 Framing Structure NONE G 751 G 753 44736 Framing Structure NONE G 752 51840 Framing Structure NONE STS 1 IDR BACKWARD ALARM CONTROL BW Alarm RX x ON OFF BW Alar...

Page 115: ...uffer Type 3 Doppler Buffer and ESC INTERFACE OPTION This menu is a status only window reporting the interface options The interface module options displayed are Buffer ESC RS EFD RS DVB ESC 64K TX IN...

Page 116: ...of the descrambler is displayed Press or to select the type Press ENTER to execute the change FRAMING STRUCTURE Displays the currently selected framing type and structure of the data Framing Type Fram...

Page 117: ...NTER to turn on all the front panel indicators for three seconds MASTER RESET HARD SOFT Initiating a hard reset will result in the modem being configured to the default settings in ROM Initiating a so...

Page 118: ...or parity press ENTER Press or to position the flashing cursor over the parameter to be changed Press or to change the parameter to the desired value Once the parameters are displayed as desired pres...

Page 119: ...ration CAUTION Initiating a hard reset will result in the modem being configured to the default settings in ROM Initiating a soft reset will reset the modem hardware but will save the current configur...

Page 120: ...ecute the change Note For any RX signal level between 25 and 50 dBm the software will interpolate the required AGC voltage EXT AGC MIN PWR Sets the AGC voltage for an RX signal level of 50 dBm The vol...

Page 121: ...ER 6 1 1 FUNCTION SELECT UTILITY UTILITY MODEM TYPE MODEM TYPE REV EMULATION CURRENT_VERSION or FUNCTIONAL X Where X 1 INTELSAT DBS N5500 COMPATIBLE ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT P...

Page 122: ...On entry the CURRENT_VERSION is displayed Press or to select the functional versions Press ENTER to execute the change Notes 1 Programming a current version default allows all features and options if...

Page 123: ...D FLTS ENABLE TX INT FLTS ENABLE RX INT FLTS ENABLE TX MODULE RESET RX MODULE RESET INT MODULE RESET ASSIGN TRANSMIT FILTERS ASSIGN RECEIVE FILTERS ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Pa...

Page 124: ...SDM 9000 Satellite Modem Operation Rev 4 4 51 Figure 4 17 RF Loopback Figure 4 18 IF Loopback...

Page 125: ...loops through the demodulator interface and the modulator DATA CLOCK LOOPBACK RELAYS Figure 4 19 Baseband Loopback Interface loopback provides loopback at the interface between the interface module an...

Page 126: ...a plesiochronous Doppler buffer is used data received from the satellite network is clocked into the buffer using the RX satellite clock Data is clocked out of the buffer and to the terrestrial netwo...

Page 127: ...ted and decoded from the satellite network 4 3 2 2 1 RX Timing with Buffer If a plesiochronous Doppler buffer is used data received from the satellite network is clocked into the buffer using the RX s...

Page 128: ...SDM 9000 Satellite Modem Operation Rev 4 4 55 Figure 4 21 G 703 Interface Clocking Diagram Figure 4 22 ECL MIL STD 188 Interface Clocking Diagram...

Page 129: ...other modules within the modem when necessary The modem configuration parameters are maintained in battery backed Random Access Memory RAM which provides total recovery after a power down situation Th...

Page 130: ...k Diagram 5 1 2 Theory of Operation The M C card is composed of the following subsections Microcontroller Digital to Analog Converter DAC Read Only Memory ROM Analog to Digital Converter ADC RAM Inter...

Page 131: ...ameters 2 If the nonvolatile memory fails the valid data test a default configuration from ROM is loaded into the system The UART supports serial ASYNC communications channels remote port with a maxim...

Page 132: ...width efficiency over that of the standard QPSK Refer to Section 5 6 for a description of the modulation types Figure 3 2 shows the modulator PCB A block diagram of the modulator baseband section is s...

Page 133: ...SDM 9000 Satellite Modem Theory of Operation Rev 4 5 5 Figure 5 3 Modulator RF Section Block Diagram...

Page 134: ...10 or 20 MHz reference Phase Error 2 0 maximum Filtering Type Nyquist pre equalized Spectral Occupancy Spectral density is 30 dB at 0 75 symbol rate Spurious and Harmonics 55 dBc Output Power 20 to 5...

Page 135: ...sion comes from the interface card The data is first differentially encoded QPSK operation and then convolutional encoding takes place For QPSK modulation processing is done in accordance with IESS 30...

Page 136: ...treams QPSK 2 8PSK 3 16QAM 4 This data is fed into a look up table for a Digital to Analog D A converter to perform amplitude equalization of the rectangular pulses The amplitude equalized data is pas...

Page 137: ...K or mQAM where m relates to the number of discrete modulation states The following table is a brief description of the modulation types QPSK 4 discrete phase angles represent the 4 possible combinati...

Page 138: ...Appendix A for details on Reed Solomon operation 5 2 4 4 16QAM Encoding Modulation The modulator converts the transmit baseband data into a modulated 16QAM carrier at 3 4 or 7 8 rate The modulator pun...

Page 139: ...ptional Refer to Section 5 6 for a description of the modulation types Figure 3 3 shows the demodulator PCB A block diagram of the demodulator is shown in Figure 5 4 and all demodulator jumper setting...

Page 140: ...erial 3 x 3 Barrel Shifter x3 Parallel Differential Decoder Extended Eb N0 Monitor Digital Delay Line 3 Bit x 526 Deep TTL to ECL Clock Loop Costas Loop AOC AGC 1 2 DDS 1 2 DDS DAC DAC To RF Demod PLL...

Page 141: ...e and puncture pattern ambiguity resolution Three parallel Viterbi decoders Three parallel differential decoders A DDS based digital clock recovery PLL A DDS based digital carrier recovery PLL Costas...

Page 142: ...Loop filter DDS The DDS performs the function of a VCO in an analog implementation but can be easily programmed to the desired center frequency via the local M C The output of the DDS is sent to the R...

Page 143: ...s The positions of the null symbols are dictated by the code rate in use Since additional symbols are inserted into the data stream the decoder clock PLL is also synchronized to the depuncture logic T...

Page 144: ...oding algorithm to provide FEC on the received data stream for errors occurring in the transmission channel A block diagram of the Viterbi decoder is shown in Figure 5 5 5 4 2 Specifications BER See F...

Page 145: ...received symbol pairs This is related to the probability that the received symbol pair was actually transmitted as one of the four possible symbol pairs The branch metrics are then processed by the A...

Page 146: ...X G 703 3971 2 X X G 703 IDR 3971 3 X X X G 703 8 448 3971 4 X G 703 8 448 3971 5 X G 703 8 448 3971 6 X G 703 5618 1 X G 703 5618 2 X G 703 64K 5618 3 X X ECL 4477 11 X ECL 4477 21 X X ECL 4477 31 X...

Page 147: ...Clock PLL TX Clock Activity TX Programming TX Configuration Buffer Underflow Overflow Buffer Full Buffer Clock PLL Buffer Clock Activity RX Data AIS Frame BER DEMUX Lock RX 2047 Lock RX Programming R...

Page 148: ...quare wave Duty cycle 50 10 75 impedance 5 5 2 2 ECL ECL Data Rate 6 0 to 52 0 Mbit s in 1 bit s steps External Clock Range 1 544 to 20 0 MHz in 8 kHz steps or at the receive data rate External Clock...

Page 149: ...data and clock TX overhead MUX ESC optional TX overhead receivers and processor RX overhead DEMUX ESC optional RX overhead processor and drivers Baseband loopback relays Interface loopback MUX Plesioc...

Page 150: ...Theory of Operation SDM 9000 Satellite Modem 5 22 Rev 4 Figure 5 6 Interface Block Diagram...

Page 151: ...2047 data is selected the transmit data is substituted with a pseudo random 2047 pattern using the internal clock if no data clock is available If ESC overhead is selected 96 kHz of additional data i...

Page 152: ...nel of the modem During the pattern search no data available is reported An alarm on AIS or a data stable state can be selected as in the transmit path An optional plesiochronous buffer removes Dopple...

Page 153: ...st be divisible by 8 kHz Additionally the external clock may be at the RX data clock rate Internal Clock Refer to TX Terrestrial This clock is at the same frequency as the TX terrestrial clock MIL STD...

Page 154: ...back through the baseband loopback relays The far end equipment loops through the demodulator interface and modulator Refer to Figure 5 7 for a block diagram BASEBAND TX DATA CLOCK TERRESTRIAL RX DATA...

Page 155: ...demodulator Refer to Figure 5 8 for a block diagram TX DATA CLOCK TERRESTRIAL RX DATA CLOCK TX DATA RX DATA MODULATOR DATA DEMODULATOR DATA MODULATOR MODULE DEMODULATOR MODULE INTERFACE MODULE TX IF...

Page 156: ...signal also includes faults in the downlink chain since major problems with the antenna Low Noise Amplifier LNA down converter and other components will cause an interruption in service and fault the...

Page 157: ...fer to IESS 308 for further clarification There are two methods for detecting a backward alarm that is being received on a particular link Each backward alarm output drives a Form C relay with all thr...

Page 158: ...Theory of Operation SDM 9000 Satellite Modem 5 30 Rev 4 This page is intentionally left blank...

Page 159: ...nd demodulator PCBs The instructions include tables and test points for ensuring that the Eb N0 typical output spectrums typical eye patterns and constellation pictures are correct If a test failure o...

Page 160: ...in Figure 6 1 Refer to Chapter 2 for the following data connections a MIL STD 188 b G 703 c ECL d PECL 3 Set up the modem for baseband loopback operation by using the Configuration Interface front pan...

Page 161: ...the modem spectrum top as shown Use this measurement for the first column on the appropriate table as listed above Read across the page to find the S N and Eb N0 for the specific code rate Once the de...

Page 162: ...Maintenance SDM 9000 Satellite Modem 6 4 Rev 4 Figure 6 2 Typical Output Spectrum with Noise Figure 6 3 Typical Output Spectrum without Noise...

Page 163: ...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 13 0 12...

Page 164: ...9 9 0 8 4 5 4 8 4 4 4 9 5 9 0 6 0 9 0 5 0 10 0 9 5 6 5 9 5 5 6 10 5 10 1 7 1 10 1 6 1 11 0 10 6 7 6 10 6 6 7 11 5 11 2 8 2 11 2 7 2 12 0 11 7 8 7 11 7 7 7 12 5 12 2 9 2 12 2 8 3 13 0 12 8 9 8 12 8 8...

Page 165: ...8 2 4 9 0 8 4 3 6 8 4 3 0 9 5 9 0 4 2 9 0 3 5 10 0 9 5 4 8 9 5 4 1 10 5 10 1 5 3 10 1 4 7 11 0 10 6 5 9 10 6 5 2 11 5 11 2 6 4 11 2 5 7 12 0 11 7 6 9 11 7 6 3 12 5 12 2 7 5 12 2 6 8 13 0 12 8 8 0 12...

Page 166: ...operating and ensure power levels data rates code rates etc are compatible 2 Allow the modem to lock up When the green carrier detect LED is on and the DEMUX lock fault has been cleared where applica...

Page 167: ...SDM 9000 Satellite Modem Maintenance Rev 4 6 9 WITH NOISE WITHOUT NOISE Figure 6 4 Typical Eye Constellations...

Page 168: ...ncludes a signal description under normal operating conditions 6 1 4 1 Interface PCB Refer to Figure 6 5 for G 703 ECL and MIL STD 188 test point locations Test Points ECL MIL STD 188 AS 4477 G 703 AS...

Page 169: ...intenance Rev 4 6 11 6 1 4 2 Modulator PCB Refer to Figure 6 6 for test point locations Test Points Signal Name TP4 SYMBOL CLK Symbol Clock TP5 BIT CLK Data Clock 3 TP8 GND Ground test point Figure 6...

Page 170: ...nel monitor See Q EYE test point TP3 DGND Ground test point TP4 Q EYE Q channel monitor The I and Q test points are digital representations of the received filtered signal To view these test points us...

Page 171: ...odem is designed to assist the operator in determining which PCB has failed The faulty PCB can be removed and returned to EFData for repair Install a satisfactory spare PCB and continue with the opera...

Page 172: ...System faults are reported in the Faults Alarms menu and stored faults are reported in the Stored Flts Alms menu Chapter 4 Refer to the fault tree Table 6 4 and the list of possible problems in order...

Page 173: ...X X X X AGC X X X X INTERNAL SCT SYN X X X X EXT REF ACT X X X MODULE X X X X PROGRAMMING X X X X CONFIGURATION X X X X DEMODULATOR FAULTS CARRIER DETECT X X X IF SYNTHESIZER X X X RX CLOCK SYN X X X...

Page 174: ...ACTIVITY X X X PROGRAMMING X X X X CONFIGURATION X X X X RX INTERFACE FAULTS BUFFER UNDERFLOW X X BUFFER OVERFLOW X X RX DATA AIS X X X X FRAME BER X X X BUFFER CLK PLL X X X BUFFER CLK ACT X X DEMUX...

Page 175: ...Y X X 12V POWER SUPPLY X X 5V SUPPLY X X 5V SUPPLY X X CONTROLLER X X X X INTERFACE MODULE X X X X BACKWARD ALARMS IDR ONLY BW ALARM RX 4 X X X BW ALARM RX 3 X X X BW ALARM RX 2 X X X BW ALARM RX 1 X...

Page 176: ...posed to the programmed condition Carrier Detect Green Decoder is locked Test Mode Yellow Flashes when the modem is in a test configuration Alarms Name Color Description TX Yellow A TX function is in...

Page 177: ...t and will turn off the modulator output Ensure the proper data rate has been set up and selected and the incoming data rate matches the modem selections I CHANNEL Activity fault for the I channel dig...

Page 178: ...common fault displayed in the modem Any problem from the input data on the modulator end of the circuit to the output of the decoder can cause this alarm First ensure the demodulator has an RF input...

Page 179: ...icate a problem in the M C card or in the interface between the demodulator card and the M C card Return the defective card for repair PROGRAMMING Demodulator programming fault Indicates the demodulat...

Page 180: ...ked loop alarm Indicates the transmitter PLL is not locked to the reference of the interface transmit clock recovery oscillator Return the interface card for repair The interface will fall back to the...

Page 181: ...for RX data fault in the Interface Configuration menu the RX data AIS is monitoring a fault condition of all 1s or 0s This is referred to as a data stable condition meaning the data is not transitioni...

Page 182: ...e RX interface module has failed to program a current configuration parameter If this fault occurs contact EFData Customer Support for assistance CONFIGURATION Receive interface configuration fault In...

Page 183: ...upply fault Use the same procedure as with 12V fault To verify the 12 VDC power supply voltage check TP4 on the display M C card A voltage of 3 81 VDC will be monitored when the 12 VDC is at the prope...

Page 184: ...LARM RX1 Receive backward alarm 1 Refer to BW alarm RX 4 for details BW ALARM TX4 Transmit backward alarm 4 The modem is being instructed to send backward alarm 4 to the distant end of the link This i...

Page 185: ...re by assembly revision and serial number Data rate dependent hardware is labeled with the associated symbol rate on a board label When replacing a plug in module care must be taken to ensure the prop...

Page 186: ...Maintenance SDM 9000 Satellite Modem 6 28 Rev 4 This page is intentionally left blank...

Page 187: ...e middle slot of the modem chassis The Reed Solomon Codec works in conjunction with the Viterbi decoder and includes additional framing interleaving and Codec processing to provide concatenated FEC an...

Page 188: ...d in this section are the Reed Solomon encoder Section A 1 2 1 and the Reed Solomon decoder Section A 1 2 2 A 1 2 1 Reed Solomon Encoder A block diagram of the Reed Solomon encoder section is shown in...

Page 189: ...number of bytes in a given block of data out of the Codec The letter k represents the number of data bytes in a given block The output data is passed to the output FIFO and then to the block interlea...

Page 190: ...0 Satellite Modem A 4 Rev 4 RSCODE n k t 208 192 8 2t CHECK BYTES kBYTES OF DATA RSWORD n BYTES 1 RSWORD 1 RS PAGE RS FRAME RS SYNC PERIOD UNIQUE WORDS GO INTO THESE BYTES Figure A 3 Reed Solomon Code...

Page 191: ...m The three channels of serial data and the clock signals come from the demultiplexer on the interface PCB and are sent to the Reed Solomon decoder section through connector JP3 The data is passed to...

Page 192: ...of bytes in a given block of data out of the Codec The letter k represents the number of data bytes in a given block The terms k n and t will vary depending on the data rate being used The Codec then...

Page 193: ...by ESD Use ESD precautionary procedures when touching removing or inserting PCBs 1 Remove Reed Solomon PCB and mounting hardware from the cardboard caddypack and anti static material 2 Check packing l...

Page 194: ...omon PCB with the interface PCB female header connectors J2 J3 and J4 respectively Refer to Figure A 5 for the connector and mounting hardware locations 4 Align Reed Solomon PCB standoffs with the int...

Page 195: ...SDM 9000 Satellite Modem Options Rev 4 A 9 JP3 JP2 R S DECODER PCB JP1 MOUNTING SPACERS AND HARDWARE 6 JP4 MOUNTING HOLES 6 JP3 JP2 R S DECODER PCB INTERFACE PCB Figure A 5 Reed Solomon Installation...

Page 196: ...rambling Reed Solomon coding Code rate puncturing DBS operation with the SDM 9000 is based on the European Broadcasting Union EBU DVB specifications of DVB SB 5 94 5 and ETS 300 421 Both of these spec...

Page 197: ...PROCESS Figure A 6 Block Diagram of SDM 9000 Configured for DBS DVB Operation A 2 1 Requirements This section covers the module types that are compatible with each option and the minimum software req...

Page 198: ...the baseband physical interface are described in Section A 2 3 Timing requirements for the baseband physical interface are presented in Section A 2 4 A 2 2 1 ECL Physical Interface The ECL interface u...

Page 199: ...N PECL_IN 5V 5 2 1 16 8 12 4 MC10H101 330 PECL_OUT PECL_OUT 330 5V Figure A 8 Typical Differential PECL Receiver and Driver Table A 1 Electrical Characteristics of ECL and PECL Interface Types Symbol...

Page 200: ...al format that are composed of 188 byte MPEG 2 packets In addition 16 null bytes are included as place holders for Reed Solomon overhead Figure A 9 shows the packet arrangement 204 BYTES 1 632 BITS SY...

Page 201: ...Figure A 10 Figure A 10 Timing for Transmit Baseband Interface Parameters for TX baseband interface timing are presented in Table A 2 Table A 2 TX Baseband Interface Timing Parameter Description Min t...

Page 202: ...because the DBS sync detect logic writes a new sync byte pattern upon receiving the sync pulse After the sync byte interval 187 bytes 1 496 bits of packet data followed by 16 bytes 128 bits of zeros...

Page 203: ...Mode Receive SYNC Pulse Timing In DBS mode a one clock period wide sync pulse is supplied coincident with the first bit of the sync byte 0x47 After the sync byte interval 187 bytes 1 496 bits of packe...

Page 204: ...nterleaver If the external sync pulse is not supplied the condition is detected In this case a new framing structure is written over the 204 byte packets in no particular relationship to the original...

Page 205: ...or The polynomial used for the PRBS is 1 X 14 X 15 The basic scrambler descrambler is shown in Figure A 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 INITIALIZATION SEQUENCE PRBS GENERATOR ENABLE FROM SYNC D...

Page 206: ...onal 16 bytes of padding at the end of each transport packet The padding is reserved for Reed Solomon RS overhead To be compatible with the DVB specification the PRBS generator must be halted and the...

Page 207: ...C BYTE SCRAMBLED PAYLOAD 187 BYTES 204 BYTES 1 632 BITS RS 204 188 8 16 BYTES Figure A 17 Reed Solomon RS 204 188 8 Error Protected Packet Note RS coding is also applied to the non inverted or inverte...

Page 208: ...h the 16 Reed Solomon check bytes The DBS mode allows a 1 for 1 byte replacement in the RS coder therefore no rate exchange is required The 204 byte RS error protected packet is then sent to the depth...

Page 209: ...verted sync bytes are always routed in branch 0 of the interleaver corresponding to a null delay The de interleaver is similar in principle to the interleaver but the branch indexes are reversed i e b...

Page 210: ...ected packets Figure A 19 shows the interleaved frame structure SYNC 1 or SYNC n 203 BYTES 203 BYTES INTERLEAVING DEPTH I 12 SYNC 1 or SYNC n Figure A 19 Interleaved Frame Structure The interleaved fr...

Page 211: ...at specified by IESS 308 INTELSAT and is shown in Figure A 20 G1 1 G1 2 G1 3 G2 1 G2 2 G2 3 G1 1 G2 1 G2 2 G1 3 RATE 1 2 CONVOLUTIONAL ENCODED DATA RATE 3 4 ENCODED PUNCTURED CHANNEL DATA G1 1 G1 2 G1...

Page 212: ...symbol clock for each exchange rate Table A 4 Rate Exchange Ratios for DVB Puncturing Rate Ratio Comment 7 8 7 4 3 4 3 2 1 2 1 1 No symbols are punctured therefore no rate exchange is required The re...

Page 213: ...ignal Space Mapping DBS DVB operation employs conventional Gray coded QPSK modulation with absolute mapping no differential coding Bit mapping in the signal space is shown in Figure A 21 Q I I 0 Q 0 I...

Page 214: ...ion H f f f N 1 1 for H f f f f f f f N N N N N sin 1 2 1 2 2 1 1 for H f f f N 0 1 for where 35 f T R N S S 1 2 2 is the Nyquist frequency The reception process uses Nyquist filters exhibiting the sa...

Page 215: ...le A 5 Reed Solomon BER Data Specification Typical BER 1 2 Rate 3 4 Rate 7 8 Rate BER 1 2 Rate 3 4 Rate 7 8 Rate 10 6 3 7 dB 4 7 dB 5 4 dB 10 6 3 1 dB 4 0 dB 5 0 dB 10 7 3 9 dB 4 9 dB 5 6 dB 10 7 3 2...

Page 216: ...tellite Modem A 30 Rev 4 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 3 0 4 0 5 0 6 0 Eb N0 dB 7 0 8 0 9 0 10 0 11 0 10 2 1 2 Rate Specification 3 4 Rate 7 8 Rate Figure A 22 QPSK 1 2 3 4 7 8 Rates wi...

Page 217: ...is valid on the rising edge Setup and hold times for the rising edge are 5 uS If byte alignment is required the 8 kHz clock can be used The first bit of data is valid with the first rising edge of th...

Page 218: ...Options SDM 9000 Satellite Modem A 32 Rev 4 This page is intentionally left blank...

Page 219: ...ion are transferred via an RS 485 optional RS 232 serial communications link Commands and data are transferred on the remote control communications link as US ASCII encoded character strings The remot...

Page 220: ...ngle character precedes all messages transmitted on the remote link This character flags the start of a message This character is for commands for responses B 2 2 Device Address The device address is...

Page 221: ...Error message for a recognized command which cannot be implemented or has parameters which are out of range add ER3_unrecognizable command cr lf Error message for unrecognizable command or bad comman...

Page 222: ...Data rate in kHz Note If the filter is calibrated for the Reed Solomon RS will be appended to the code rate Example 3 4 RS_44736 0 Modulator Rate Preset Selection Command Response Status add SMRx_ cr...

Page 223: ...xxx cr lf Where xxxx NRM normal spectrum or INV inverted spectrum B 3 2 Demodulator Demodulato r Frequency Command Response Status Response add DF_nnn nnnn cr add DF_nnn nnnn cr lf add DF_ cr add DF_n...

Page 224: ...r Spectrum Rotation Command Response Status Response add DSR_xxxx cr add DSR_xxxx cr lf add DSR_ cr add DSR_xxxx cr lf Where xxxx NRM normal spectrum or INV inverted spectrum B 3 3 Interface Transmit...

Page 225: ...ere xxx ON or OFF Interface Coding Format Transmit Command Response Status Response add ICFT_xxxx cr add ICFT_xxxx cr lf add ICFT_ cr add ICFT_xxxx cr lf Where xxxx AMI B3ZS or HDB3 Interface Coding F...

Page 226: ...ceive Overhead Type Command Response Status Response add IROT_xxxx cr add IROT_xxxx cr lf add IROT_ cr add IROT_xxxx cr lf Where xxxx NONE or IDR Note If the ESC Option is not installed only NONE will...

Page 227: ...here mm 1 to 12 month dd 1 to 31 day yy 00 to 99 year Remote Command Response add REM_ cr add REM_ cr lf The Remote command configures the modem for remote operation The modem will respond to any stat...

Page 228: ...r lf RF Output ON OFF Modulator Frequency Modulator Rate Preset A Assignment Preset B Assignment Preset C Assignment Preset D Assignment Modulator Power Offset Modulator Output Power Differential Enco...

Page 229: ...oder ON OFF Backward Alarm Enable TX1 Backward Alarm Enable TX2 Backward Alarm Enable TX3 Backward Alarm Enable TX4 Scrambler Type RF Output ON OFF This command is used by the EFData M N protection sw...

Page 230: ...N OFF IF Loopback ON OFF External Reference Frequency Buffer Clock Receive Clock Phase Baseband Loopback Interface Loopback Interface Loop Timing Interface Coding Format Receive Interface Read Error R...

Page 231: ...face Substitution Pattern TX 2047 Interface Read Error RX 2047 Transmit Data Fault Receive Data Fault Service Channel Level TX1 Service Channel Level TX2 Service Channel Level RX1 Service Channel Leve...

Page 232: ...ule Carrier Detect IF Synthesizer Lock Receive Clock Synthesizer I Channel Q Channel Descrambler BER Threshold Programming Configuration Number of Stored Faults Logged 0 to 10 Interface Transmit Side...

Page 233: ...2_xxx cr TXBWA3_xxx cr TXBWA4_xxx cr RXBWA1_xxx cr RXBWA2_xxx cr RXBWA3_xxx cr RXBWA4_xxx cr SFLT_xx cr lf TX Backward Alarm 1 TX Backward Alarm 2 TX Backward Alarm 3 TX Backward Alarm 4 RX Backward A...

Page 234: ...2003 5207 1010 1012 cr lf Where t t Time corrected BER samples in seconds 0 1 to 9 9 At least one data point has been logged s1 to sn Corrected BER samples in the format of xmmee where x the optional...

Page 235: ...the error rate cannot be calculated 3 Sampling is returned if not enough data is currently available to calculate the error rate Eb N0 Status Command Response add EBN0_ cr add EBN0_xnn ndB cr lf Where...

Page 236: ...alue s or receive signal level sign plus or minus nn 0 to 99 receive signal level magnitude Notes 1 The x or parameter is only returned if the level has exceeded the computational resolution of the sy...

Page 237: ...SCT_xxx cr EXT_xxx cr PROG_xxx cr CONF_xxx cr lf Module IF Synthesizer Data Clock Activity Data Clock Synthesizer I Channel Q Channel AGC Level Internal SCT Synthesizer External Reference Activity Pro...

Page 238: ...e add CSF_ cr add CSF_ hh mm ss MM DD YY cr M C_xxx cr INT_xxx cr BAT_xxx cr 5_xxx cr 5_xxx cr 12_xxx cr 12_xxx cr lf M C Module Data Interface Module Battery Clock 5V Power Supply 5V Power Supply 12V...

Page 239: ...meter returned Parameter Number Parameter Name Command Reference Description 1 2 3 4 5 6 Receive Signal Level ref RSL_ command Raw BER ref RBER_ command Corrected BER ref CBER_ command Interface Read...

Page 240: ...eset B assignment ref ARMB_ command Modulator preset C assignment ref ARMC_ command Modulator preset D assignment ref ARMD_ command Modulator power offset ref MPO_ command Modulator output power level...

Page 241: ...ref RCP_ command Baseband loopback ref BBL_ command Interface loopback ref ILB_ command Interface loop timing ref ILT_ command TX Interface coding format ref ICFT_ command RX Interface coding format r...

Page 242: ...Remote Control Operation SDM 9000 Satellite Modem B 24 Rev 4 ref SE_ command...

Page 243: ...phase ref TDP_ command Receive data phase ref RDP_ command Backward Alarm enable TX1 ref BW_TX1_ command Backward Alarm enable TX2 ref BW_TX2_ command Backward Alarm enable TX3 ref BW_TX3_ command Ba...

Page 244: ...mmand Interface 44736 frame structure ref IRFS_ command Interface 51840 frame structure ref IRFS_ command Modem operation mode ref MOM_ command MODEM REMOTE LOCAL mode System modem type ref SMT_ comma...

Page 245: ...Modulator fault status character 3 Bit 6 1 always Bit 5 Internal SCT Synthesizer Bit 4 Programming Bit 3 Configuration Bit 2 External Reference Activity Bit 1 reserved Bit 0 reserved Where Character d...

Page 246: ...Bit 3 2047 Pattern Lock Detect Bit 2 Buffer Full Bit 1 Programming Bit 0 Configuration Where Character l Common equipment fault status character 1 Bit 6 1 always Bit 5 Monitor and Control Module Bit 4...

Page 247: ...er 0 to 999999 dd Firmware dash number 0 to 99 r Firmware revision or A to Z Modulator Firmware Information Command Response add MFI_ cr add MFI_ cr VER_xxx yyy zzz cr FW nnnnnn ddr cr mm dd yy cr FPG...

Page 248: ...ption installed Interface Options Misc Information Command Response add IOI_ cr add IOI_ cr dddddd cr y BUILD cr x BUFFER cr x ESC cr x RS_EFD cr x RS_DVB cr x 64K_ESC_ cr z TX_ESC_JUMPER cr z RX_ESC_...

Page 249: ...Modulation AFC Automatic Frequency Control AGC Automatic Gain Control AIS Alarm Indication Signal AM Amplitude Modulation AMI Alternate Mark Inversion AOC Automatic Offset Control APM Amplitude Phase...

Page 250: ...Compatible CSMA Carrier Sense Multiple Access CTS Clear to Send CU Channel Unit CW Continuous Wave D I Drop and Insert D A Digital to Analog D C Down Converter DAC Digital to Analog Converter DAMA Dem...

Page 251: ...cy Shift Keying FIFO First in First Out Flt Fault FM Frequency Modulation FPGA Field Programmable Gate Array FS Frame Sync FSK Frequency Shift Keying FW Firmware GHz Gigahertz 109 hertz GND Ground HI...

Page 252: ...on or Normally Closed NO Normally Open NRZ Non Return to Zero code ns Nanosecond 10 9 second OQPSK Offset Quadrature Phase Shift Keying OSC Oscillator p pico 10 12 P P Peak to Peak P AR Peak to Averag...

Page 253: ...Amplifier ST Send Timing SW Switch SYNC Synchronize TB Terminal Block TCXO Temperature Compensated Crystal Oscillator TDMA Time Division Multiple Access TEMP Temperature TERR Terrestrial TP Test Poin...

Page 254: ...Glossary SDM 9000 Satellite Modem g 6 Rev 4 This page is intentionally left blank...

Page 255: ...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...

Page 256: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...

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