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SDM-100A

Satellite Modem
Installation and Operation Manual

Part Number MN/SDM100A.IOM
Revision 0

Содержание SDM-100A

Страница 1: ...SDM 100A Satellite Modem Installation and Operation Manual Part Number MN SDM100A IOM Revision 0...

Страница 2: ......

Страница 3: ...West 5th Place Tempe Arizona 85281 USA 602 968 0447 FAX 602 921 9012 EFData Corporation is an ISO 9001 Registered Company SDM 100A Satellite Modem Installation and Operation Manual Part Number MN SDM1...

Страница 4: ...specifically disclaims the implied warranties of merchantability and fitness for particular purpose Exclusive Remedies The remedies provided herein are the buyer s sole and exclusive remedies EFData C...

Страница 5: ...e for the operation and maintenance of the SDM 100A Conventions and References Used in this Manual Cautions and Warnings CAUTION CAUTION indicates a hazardous situation that if not avoided may result...

Страница 6: ...ype 1 generator for the full range of data rates For more information refer to the Department of Defense DOD MIL STD 188 114A Electrical Characteristics of Digital Interface Circuits Trademarks Produc...

Страница 7: ...ctive 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 Alternating Curr...

Страница 8: ...1 9012 FAX or E Mail can be sent to the Customer Support Department at service efdata com To return an EFData product in warranty and out of warranty for repair or replacement 1 Request a Return Mater...

Страница 9: ...em Specifications 1 5 1 5 BER Performance 1 7 CHAPTER 2 INSTALLATION 2 1 2 1 Unpacking 2 1 2 2 System Installation 2 2 2 3 System Requirements 2 3 2 4 External Connections 2 5 2 4 1 DATA I O Interface...

Страница 10: ...tility 3 37 3 2 1 6 1 Utility Modulator 3 39 3 2 1 6 2 Utility Demodulator 3 43 3 2 1 6 3 Utility Interface 3 45 3 2 1 6 4 Utility System 3 49 3 2 1 6 5 Utility Modem Type 3 51 3 2 1 6 6 Utility Facto...

Страница 11: ...1 RS 422 Interface 4 14 4 4 1 1 Connector Pinouts 4 17 4 4 1 2 Specification 4 18 4 4 2 V 35 Interface 4 18 4 4 2 1 Connector Pinouts 4 21 4 4 2 2 Specification 4 22 4 4 3 RS 232 C Interface 4 22 4 4...

Страница 12: ...peration B 6 B 1 1 7 Baseband Loopback Operation B 6 B 1 1 8 Non ASYNC Operation B 6 B 1 1 9 ASYNC Channel RS 485 2 and 4 Wire B 6 B 1 1 10 Valid ASYNC Baud Rates B 7 B 1 2 Installation Instructions B...

Страница 13: ...ator Configuration B 16 B 2 2 4 Utility Interface B 17 B 2 2 5 TX Alarm Indication B 17 B 2 2 6 RX Alarm Indication B 17 B 2 2 7 DEMUX Lock B 17 B 2 2 8 Remote Off Hook B 17 B 2 3 Specifications B 18...

Страница 14: ...3 44 Figure 3 14 Utility System SDM 100 Operation 3 48 Figure 3 15 Utility Modem Type SDM 100 and Type 1 Operation 3 51 Figure 3 16 Utility Factory Setup SDM 100 and Type 1 Operation 3 52 Figure 3 17...

Страница 15: ...Reed Solomon Encoder Section Block Diagram B 20 Figure B 6 Reed Solomon Code Page Format B 21 Figure B 7 Reed Solomon Decoder Section Block Diagram B 22 Tables Table 1 1 SDM 100A Specifications 1 5 Ta...

Страница 16: ...Table of Contents SDM 100A Satellite Modem xii Rev 0 This page is intentionally left blank...

Страница 17: ...ev 0 1 1 Chapter 1 INTRODUCTION This chapter provides the description options and specifications for the SDM 100A satellite modem referred to in this manual as the modem Figure 1 1 Figure 1 1 SDM 100A...

Страница 18: ...RMS FORM C CONTACTS COMMAND BUS POWER SUPPLY 90 to 264 VAC 47 to 63 Hz ANTENNA REMOTE SERIAL INTERFACE J6 MONITOR CONTROL DATA CLK DECODER DEMOD CP2 IF INPUT 50 to 90 MHz 100 to 180 MHz 30 to 55 dBm R...

Страница 19: ...9 rack mountable enclosure weighing approximately 10 lbs A dimensional drawing of the modem is shown in Figure 1 3 All monitor and control functions and indicators for operation of the modem are locat...

Страница 20: ...ions refer to Appendix B 1 3 1 ASYNC AUPC Interface The ASYNC interface board provides the interface for terrestrial data and a single ASYNC overhead channel along with an AUPC feature 1 3 2 ADPCM Voi...

Страница 21: ...pin D Asynchronous ADPCM Digital Data Rate BPSK 1 2 Rate 9 6 to 64 kbit s QPSK 1 2 Rate 19 2 to 128 kbit s QPSK 3 4 Rate 28 8 to 192 kbit s QPSK 7 8 Rate 33 6 to 224 kbit s Doppler Buffer Programmabl...

Страница 22: ...sition Range 100 PPM Acquisition Time 1 second typical at 64 kbit s Directed Sweep Sweep Range 0 to 70000 Hz Sweep Center 35000 to 35000 Hz Remote Control Specifications Serial Interface RS 232 C or R...

Страница 23: ...em with a Viterbi decoder is shown in Figure 1 4 The BER performance of the modem with a sequential decoder is shown in Figure 1 5 A typical output spectrum of the modem is shown in Figure 1 6 Notes 1...

Страница 24: ...ion SDM 100A Satellite Modem 1 8 Rev 0 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 7 8 RATE 3 4 RATE 1 2 RATE Figure 1 4 Viterbi Bit Error Rate Per...

Страница 25: ...atellite Modem Introduction Rev 0 1 9 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 1 2 RATE 7 8 RATE Figure 1 5 Sequential Bit Error Rate P...

Страница 26: ...ellite Modem 1 10 Rev 0 ATTEN 0 dB 10 00 dB DIV 64 kbit s 1 2 RATE QPSK VITERBI SDM 100 RL 10 00 dBm CENTER 70 000 0 MHz 1 00 k 30 0 SPAN 500 0 kHz ST 50 00 TYPICAL SDM 100A OUTPUT SPECTRUM Figure 1 6...

Страница 27: ...ds are contained in the modem chassis To remove the modem CAUTION Do not use any cutting tool that will extend more than 1 into the container and cause damage to the modem 1 Cut the tape at the top of...

Страница 28: ...ical rack elevation for an M N system 2 Connect the cables to the appropriate locations on the rear panel Refer to Section 2 4 for connector pinouts placement and functions 3 Before applying power rea...

Страница 29: ...LITY SYSTEM menu under FUNCTION SELECT UTILITY on the front panel Select OPERATION MODE Enter the menu and select Transmit Only This will mask all receive faults and receive stored faults in the Fault...

Страница 30: ...Installation SDM 100A Satellite Modem 2 4 Rev 0 Figure 2 1 Typical Rack Elevation...

Страница 31: ...Connector Type Function DATA I O J8 Various Data Input Output 37 pin D RS 422 449 34 pin block or 25 pin D V 35 25 pin D RS 232 50 pin D ASYNC 50 pin D ADPCM Voice REMOTE J6 9 pin D Remote Interface...

Страница 32: ...the modem is used to interface the Monitor and Control M C functions to a remote location This interface can be either RS 232 C or RS 485 For a more information on the remote interface refer to Chapte...

Страница 33: ...female D connector Screw locks are provided for mechanical security on the mating connector Pin Name Function 1 NO Common Equipment is OK 2 COM 3 NC Common Equipment is FAULTED 4 NO Modulator is OK 5...

Страница 34: ...264 VAC 47 to 63 Hz The modem will automatically switch between ranges Maximum power consumption is less than 40W 2 4 7 DC Power DC power is available as an option The DC power is supplied to the mod...

Страница 35: ...ont panel of the modem Figure 3 1 provides the local user interface which is necessary to configure and monitor status of the modem Figure 3 1 Front Panel View The front panel features a 32 character...

Страница 36: ...ts in the receive chain Common fault Red Indicates that a common equipment fault condition exists Stored Yellow Indicates that a fault has been logged and stored The fault may or may not be active Sta...

Страница 37: ...hange which has not been executed using ENTER Pressing CLEAR generally returns the display to the previous selection and These keys are used to move to the next selection or to move the cursor for cer...

Страница 38: ...M 100 or Type 1 and line 2 shows the version number of the firmware implemented in the modem The main level of the menu system is the FUNCTION SELECT menu which may be accessed from the base level by...

Страница 39: ...ure 3 4 CONFIGURATION INTERFACE Figure 3 5 FUNCTION SELECT STORED FLT ALMS Figure 3 9 FUNCTION SELECT UTILITY UTILITY MODULATOR Figure 3 11 UTILITY DEMODULATOR Figure 3 12 UTILITY INTERFACE Figure 3 1...

Страница 40: ...Operation SDM 100A Satellite Modem 3 6 Rev 0 This page is intentionally left blank...

Страница 41: ...selected configuration menu by pressing ENTER Press or to view the selected configuration parameters To change a configuration parameter press ENTER to begin the change process Press or to make the ch...

Страница 42: ...ENCODER CARRIER MODE x A B C D or V TX A QPSK 1 2 64 000 kbit s TX B QPSK 1 2 96 000 kbit s TX C QPSK 1 2 128 000 kbit s TX D QPSK 1 2 38 400 kbit s TX V QPSK 1 2 19 200 kbit s 50 to 180 MHz in 2 5 kH...

Страница 43: ...or Press ENTER to execute the change To operate BPSK select TX V and select BPSK 1 2 for the code rate then enter the data rate from 9 6 to 64 kbit s Press ENTER to execute the change Note When the TX...

Страница 44: ...ograms the modem for continuous wave mode Four modes of operation are available Normal OFF Center Dual and Offset modes The Carrier mode is normally in the OFF position To change to Center Dual or Off...

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Страница 46: ...x A B C D or V TX A QPSK 1 2 64 000 kbit s TX B QPSK 1 2 96 000 kbit s TX C QPSK 1 2 128 000 kbit s TX D QPSK 1 2 38 400 kbit s TX V QPSK 1 2 19 200 kbit s 50 to 180 MHz In 2 5 kHz steps ON OFF ON OFF...

Страница 47: ...quency Programs the receive frequency between 50 and 180 MHz in 2 5 kHz steps On entry the current receive frequency is displayed with the flashing cursor on the first character Press or to move the f...

Страница 48: ...R to execute the change Sweep Center Programs the sweep center frequency for the directed sweep function The sweep center frequency may be set in the range from 35000 to 35000 Hz On entry the current...

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Страница 50: ...INTERNAL AUTO NORMAL INVERT RX SATELLITE SCT INTERNAL EXT REFERENCE TX TERRESTRIAL 64 to 65536 Bits in 16 bit steps or Bypass 0 bits 0 to 50 ms YES NO NORMAL INVERT OFF ON LOOP TIMING ON OFF ASYNC onl...

Страница 51: ...CIRCUIT 1 2 3 or 4 ADPCM only ENCODING TYPE A LAW LAW ADPCM only ON HOOK OFF HOOK ON HOOK OFF FOOK ADPCM only TX CHANNEL LEVEL X 20 to 10 in 1 dBm steps ADPCM only RX CHANNEL LEVEL X 20 to 10 in 1 dB...

Страница 52: ...normal or invert to properly phase the transmit clock with the transmit data Press ENTER to execute the change Buffer Clock Programs interface buffer output clock RX SATELLITE sets the output buffer c...

Страница 53: ...h set the buffer units to milliseconds When a specific buffer depth is desired set the buffer units to bits To select bits or milliseconds enter the Utility Interface menu and make the change Buffer C...

Страница 54: ...installed E M Circuit This allows the user to chose which E M signaling type is selected Types 1 to 4 are supported Available only with the ADPCM option installed Encoding Type This configures the au...

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Страница 56: ...ARGET NOISE TRACKING RATE LOCAL CL ACTION ON OFF 30 to 5 dBm 30 to 5 dBm 30 to 5 dBm 3 2 to 9 7 dB in 0 1 dB increments 0 5 to 6 0 dBm per minute MAXIMUM NOMINAL HOLD If carrier lock is detected REMOT...

Страница 57: ...from 30 to 5 dBm Target Noise This option programs the target Eb N0 setpoint The Eb N0 setpoint can range from 3 2 to 9 7 dB in 0 1 dB increments Tracking Rate This option programs the maximum trackin...

Страница 58: ...te CURRENT CORRECTED BER NO DATA if carrier not locked Low limit based on performance High limit 1 0 E 12 CURRENT Eb N0 NO DATA if carrier not locked Low limit based on data rate High limit 16 0 dB CU...

Страница 59: ...w Corrected BER Corrected Bit Error Rate Range m m E e to m m E e See Note below Eb N0 Energy bit Noise Ratio Range mm m to mm m See Note below Receive Signal Receive Signal Level Range mm m to mm m S...

Страница 60: ...tes that no fault or alarm exists indicates that a fault exists and will cause switching in a redundant system A reversed contrast sign appearing on the display indicates an alarm is active Note Alarm...

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Страница 62: ...ZER DATA CLOCK SYN I CHANNEL Q CHANNEL AGC LEVEL MODULE See notes CARRIER DETECT IF SYNTHESIZER I CHANNEL Q CHANNEL DESCRAMBLER BER THRESHOLD MODULE See notes BATTERY CLOCK 12 VOLT SUPPLY 12 VOLT SUPP...

Страница 63: ...is considered a major alarm and will turn off the modulator IF output An alarm in this position indicates either a fault in the scrambler or if the scrambler is disabled it indicates a loss of incomi...

Страница 64: ...air I Channel Indicates loss of activity in the I channel of the quadrature demodulator Typically indicates a problem in the modulator side of the circuit Check for proper RF input to the demodulator...

Страница 65: ...fer Underflow Buffer Underflow Alarm The plesiochronous buffer has underflowed As buffer underflow is normally a momentary fault there are clock problems if this is continuously present this is includ...

Страница 66: ...his voltage is not correct it will verify that the 12V supply is not at the proper level This would indicate the power supply is faulted Return modem for repair 12 Volt Supply 12V power supply fault U...

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Страница 68: ...MM SS MM DD YY TX AUDIO CLIP TX CLK ACTIVITY HH MM SS MM DD YY BUFFER CLK ACT BUFFER UNDERFLOW BUFFER OVERFLOW RX AUDIO CLIP DEMUX LOCK REMOTE OFF HOOK HH MM SS MM DD YY BATTERY CLOCK 12 VOLT SUPPLY 1...

Страница 69: ...equipment fault 0 and common equipment fault 1 Upon entering the Stored Faults level press or to move between the fault groups and the CLEAR Stored Faults selections The time and date of the first sto...

Страница 70: ...the change BB Loop Back Status Programs the modem for baseband loopback operation test mode When baseband loopback is turned on the data and timing signals are hard wired via relays from the demodulat...

Страница 71: ...the front panel optical indicators Choose filtering types code rates decoder types TX and RX fault enables modem type and overhead type After entering the UTILITY functions level press or to select th...

Страница 72: ...LOSED FDC CLOSED EFD CLOSED VITERBI SEQUENTIAL ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key x FILTER A B C D or V TX A QPSK 1 2 19 200 kbit s TX B QPSK 1 2 38 400 kbit s...

Страница 73: ...ing cursor is at the parameter to be changed then press or to change that parameter When all changes are made press ENTER to confirm the assignment If a preset data code rate is changed and the modem...

Страница 74: ...ouble beep and not allow the selection change TX BPSK Ordering Select Standard or Non standard TX BPSK ordering The normal operation is Standard TX BPSK ordering If the Receiver will not lock selectin...

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Страница 76: ...NG A B C D or V RX A QPSK 1 2 64 000 kbit s RX B QPSK 1 2 96 000 kbit s RX C QPSK 1 2 128 000 kbit s TX D QPSK 1 2 38 400 kbit s RX V QPSK 1 2 19 200 kbit s INTELSAT OPEN CSC CLOSED FDC CLOSED EFD CLO...

Страница 77: ...eceive filtering Decoder Type Select Viterbi or Sequential decoder type If the sequential encoder firmware is not installed the modem will double beep and not allow the selection change RX BPSK Orderi...

Страница 78: ...S 232 ASYNC ONLY 2 WIRE 4 WIRE SD SIGNAL RD SIGNAL 2 WIRE 4 WIRE ASYNC ONLY NORMAL INVERT ASYNC OR ADPCM ONLY NORMAL INVERT ASYNC OR ADPCM ONLY RR SIGNAL NORMAL INVERT ASYNC OR ADPCM ONLY DM SIGNAL RS...

Страница 79: ...IF Cntrl Programs the modem to allow a Request To Send RTS signal to enable the output when data is ready for transmission Terrestrial Interface This selects the interface type for the terrestrial da...

Страница 80: ...erted signal poarity Available only with the ASYNC option MC Signal Inverts the polarity of the MC signal Select either NORMAL or INVERT inverted signal poarity Available only with the ASYNC option TT...

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Страница 82: ...MODULE FW Status Only FW NNNNNN DDR MM DD YY FPGA FIRMWARE Status Only FW NNNNNN DDR FPGA FIRMWARE MM DD YY DSP FIRMWARE Status Only FW NNNNN DDR DSP FERMWARE MM DD YY MASTER RESET ACCESS TO SUBMENU...

Страница 83: ...arity The baud rate can be set from 110 to 19200 bits s The parity can be set to even odd or none Remote Address The current modem address is displayed 1 to 255 To set the remote address press ENTER P...

Страница 84: ...ocessor DSP Upon entry the date of release of this firmware will be displayed This is a status window only Master Reset Master reset function CAUTION When a hard reset is initiated the modem hardware...

Страница 85: ...This configuration allows the user to select normal SDM 100A operation or to direct the modem to simulate an SDM 650B by selecting Type 1 operation The modem will then simulate an SDM 650B that conta...

Страница 86: ...TY FACTORY SETUP Factory setup should not be changed by unauthorized persons Failure to comply may cause modem failure Figure 3 16 Utility Factory Setup SDM 100 and Type 1 Operation 3 2 1 6 6 Utility...

Страница 87: ...ITOR Figure 3 19 FUNCTION SELECT FAULTS ALARMS Figure 3 20 FUNCTION SELECT STORED FLT ALMS Figure 3 21 FUNCTION SELECT UTILITY UTILITY MODULATOR Figure 3 22 UTILITY DEMODULATOR Figure 3 23 UTILITY INT...

Страница 88: ...B QPSK 1 2 96 000 kbit s RX C QPSK 1 2 128 00 kbit s RX D QPSK 1 2 32 00 kbit s RX V QPSK 1 2 19 2 kbit s 50 to 180 MHz in 2 5 kHz steps 50 to 180 MHz in 2 5 kHz steps ON OFF 5 to 30 dBm in 0 1 dBm s...

Страница 89: ...variable data rate select TX V and press ENTER twice to select the currently defined data rate To change the rate using the variable rate selection press ENTER when TX V is displayed A flashing curso...

Страница 90: ...y is displayed with the flashing cursor on the first character Press or to move the flashing cursor and or to increment or decrement the digit at the flashing cursor Press ENTER to execute the change...

Страница 91: ...odulator When RF loopback is turned off the demodulator is tuned to its previous frequency Refer to Figure 3 26 for a block diagram of RF loopback operation Note RF loopback nullifies IF loopback On e...

Страница 92: ...N or OFF Press ENTER to execute the change V 35 Descrambler Programs the descrambler ON or OFF On entry the current status of the V 35 descrambler is displayed Press or to select ON or OFF Press ENTER...

Страница 93: ...e to Center Offset or Dual mode enter the Carrier Mode Menu and select the desired test mode Center Mode A test mode that generates a carrier at the current modulator frequency This can be used to mea...

Страница 94: ...ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key Figure 3 19 Monitor Type 1 Operation 3 2 2 2 Monitor Type 1 Operation When the Monitor level is entered press or to select t...

Страница 95: ...current faults alarms status is displayed on line 2 of the display in real time Fault status is displayed as a or for each parameter monitored indicates that no fault or alarm exists indicates that a...

Страница 96: ...ECT FAULTS ALARMS MODULATOR DEMODULATOR COMMON IF SYNTHESIZER DATA CLOCK ACT DATA CLOCK SYN I CHANNEL Q CHANNEL AGC LEVEL MODULE See notes CARRIER DETECT IF SYNTHESIZER DATA CLOCK SYN I CHANNEL Q CHAN...

Страница 97: ...cked Data Clock Syn Receive clock synthesizer fault Indicates the internal VCO has not locked to the incoming data clock I Channel I channel activity fault Indicates a loss of activity in the I channe...

Страница 98: ...DD YY CARRIER DETECT IF SYNTHESIZER DATA CLOCK SYN I CHANNEL Q CHANNEL DESCRAMBLER BER THRESHOLD MODULE See Notes HH MM SS MM DD YY BATTERY CLOCK 12 VOLT SUPPLY 12 VOLT SUPPLY 5 VOLT SUPPLY CONTROLLER...

Страница 99: ...indicate the power up time and date On power up the power down and power up times are logged as common equipment fault 0 and common equipment fault 1 Upon entering the Stored Faults menu press or to m...

Страница 100: ...e user to Set the time and date of the modem real time clock Choose filtering types Select decoder types Choose TX and RX fault enables Select modem type Choose overhead type Assign data rates Assign...

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Страница 102: ...C CLOSED EFD CLOSED ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key x FILTER A B C D or V TX A QPSK 1 2 64 000 kbit s TX B QPSK 1 2 96 000 kbit s TX C QPSK 1 2 128 000 kbit...

Страница 103: ...will be the code rate 1 2 3 4 or 7 8 On line 2 will be the data rate assigned to preset A Press or to see the assignments for presets B C D and V TX B TX C TX D and TX V To change a preset assignment...

Страница 104: ...RX A QPSK 1 2 64 000 kbit s RX B QPSK 1 2 96 000 kbit s RX C QPSK 1 2 128 000 kbit s RX D QPSK 1 2 32 000 kbit s RX V QPSK 1 2 19 200 kbit s code_rate QPSK or BPSK m n 1 2 3 4 7 8 CSC CLOSED FDC CLOSE...

Страница 105: ...transmit filters The receive filters assignments are basically identical Demodulator Type Receive filter type select Allows the operator to select CSC Closed FDC Closed or EFD Closed network receive f...

Страница 106: ...NTERFACE TYPE TX CLOCK PHASE BUFFER CLOCK RS422 V 35 RS232 ASYNC ADPCM AUTO NORMAL INVERT EXT REFERENCE RX SATELLITE TX TERRESTRIAL ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Informat...

Страница 107: ...is displayed Press or to select EXT REFERENCE RX SATELLITE or TX TERRESTRIAL for the buffer clock Press ENTER to execute the change Buffer Size This configuration function is used to set the size of...

Страница 108: ...NNNN DDR MM DD YY FPGA FIRMWARE Status Only FW NNNNNN DDR FPGA FIRMWARE MM DD YY DSP FIRMWARE Status Only FW NNNNN DDR DSP FIRMWARE MM DD YY MASTER RESET ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPEND...

Страница 109: ...ver the parameter to be changed Press or to change the parameter to the desired value Once the parameters are displayed as desired press ENTER to set the baud rate and parity The baud rate can be set...

Страница 110: ...sor DSP Upon entry the date of release of this firmware will be displayed This is a status window only Master Reset Master reset function CAUTION When a hard reset is initiated the modem hardware is r...

Страница 111: ...MODEM REQUIRES AN EXTERNAL PATH TO LOCK THIS IS DONE EITHER AT THE MODEM INPUT OR FROM THE SATELLITE EQUIPMENT DEMODULATOR DECODER SATELLITE SDM 100A DATA MODEM Figure 3 26 RF Loopback Note When RF l...

Страница 112: ...lator This test mode will verify the operation of the modem When IF loopback is turned off the demodulator is programmed back to its previous frequency and is reconnected to the IF input TRANSMIT RF E...

Страница 113: ...owever if the buffer is properly set up the slips will be an exact frame length causing minimum loss of data By using very high stability clocks the expected time between slips can be many days Loss o...

Страница 114: ...Operation SDM 100A Satellite Modem 3 80 Rev 0 Figure 3 29 Master Master Clocking Block Diagram...

Страница 115: ...SDM 100A Satellite Modem Operation Rev 0 3 81 Figure 3 30 Master Slave Clocking Block Diagram...

Страница 116: ...Operation SDM 100A Satellite Modem 3 82 Rev 0 This page is intentionally left blank...

Страница 117: ...at is provided by the Interface section The following subsections make up the modulator Scrambler differential encoder Convolutional encoder I Q Nyquist filters Modulator Output amplifier RF synthesiz...

Страница 118: ...MBLERS AND DIFFERENTIAL ENCODER CONVOLUTIONAL ENCODERS DIGITAL NYQUIST DAC ALIAS FILTER DIGITAL NYQUIST DAC ALIAS FILTER 0 90 IF FILTER VARIABLE ATTENUATOR ATTENUATOR RF SYNTH Figure 4 1 Modulator Blo...

Страница 119: ...ping and equalization The filters are controlled by the M C so symbol rates up to 128 ks s can be achieved without requiring the filter to be changed The I Q filtered data signals are applied to the R...

Страница 120: ...to get the receiver to lock Selecting Non Standard or inverted phase for TX BPSK ordering will force the MUX to output the In phase and Quadrature I Q data streams in the opposite order thereby match...

Страница 121: ...ternal Oscillator Frequency Stability SCT 10 PPM Internal Oscillator Phase Error 2 5 max Filtering Type Nyquist Pre equalized Spectral Occupancy Spectral Density is 30 dB at 0 75 Symbol Rate Spurious...

Страница 122: ...ation of the received signal This result is then fed to the Costas loop where carrier phase lock is performed A data clock phase lock loop then recovers the data clock and the soft decision mapper con...

Страница 123: ...correct transmission channel errors in the received data stream Refer to Figure 4 4 for a block diagram of the Viterbi decoder The Viterbi decoder processes 3 bit quantized R0 and R1 parallel code bit...

Страница 124: ...s used for output The difference between the minimum and maximum path metrics is used as the means of determining decoder synchronization The data may then be descrambled and differentially decoded Bo...

Страница 125: ...of data bits for a given received sequence The search proceeds from a node in the code tree by choosing the branch with the highest metric value highest probability of a match between the received da...

Страница 126: ...from the card The sequential decoder also provides a lock detect signal to the M C when the error rate has dropped below a threshold level The M C monitors these signals and takes appropriate action T...

Страница 127: ...mory on the M C module allows it to retain configuration information for at least one year without power Should the modem be powered down the following sequence is carried out when power is applied to...

Страница 128: ...2 C interface is used to communicate with a single modem The M C must be hardware configured to one of the two interfaces RS 485 configuration Install two jumpers shunts at RS 485 positions of JP10 an...

Страница 129: ...19 2 kbit s QPSK TX IF Frequency 70 MHz RX IF Frequency 70 MHz TX IF Output OFF V 35 Descrambler ON Mod Power Offset 0 dB Differential Decoder ON TX Power Output 10 dBm Demodulator Type INTELSAT Open...

Страница 130: ...ctrical and mechanical specifications refer to Sections 4 4 1 1 and 4 4 1 2 Refer to Figure 4 6 for a functional diagram of the interface The RS 422 interface provides a Send Timing ST clock signal at...

Страница 131: ...gure 4 6 RS 422 Block Diagram Table 4 1 M C Jumper Settings AS 4973 Jumper Position Function JP10 1 to 2 RS 485 3 to 4 RS 485 5 to 6 RS 232 C 7 to 8 RS 232 C JP22 3 to 4 RS 485 also 1 to 2 SDM 100 ope...

Страница 132: ...R indicates that an RF carrier is being received and demodulated with a sufficiently low error rate for the decoder to remain locked The RS 422 interface also provides bi directional relay loopback of...

Страница 133: ...ided for mechanical security of the mating connector Signal Function Name Pin Send Data SD A 4 SD B 22 Send Timing ST A 5 ST B 23 Receive Data RD A 6 RD B 24 Request To Send RS A 7 See note below RS B...

Страница 134: ...terface provides level translation buffering and termination between the internal modem signals and the V 35 DCE interface on the rear panel Electrical characteristics of the interface signals are def...

Страница 135: ...g is used when standard specifications on clock and data relationships exist The INVERT mode is used when the incoming clock is inverted from the standard clock and data relationship Data received by...

Страница 136: ...d back to SCR From the modem side the received data and recovered clock are routed back to the modulator input for retransmission Loop timing is supported by the selection of the RX Satellite Clock so...

Страница 137: ...T A Y 15 SCT B a AA 12 Receive Data RD A R 3 RD B T 16 Serial Clock Receive SCR A V 17 SCR B X 9 Serial Clock Transmit External SCTE A U 24 SCTE B W 11 Master Clock Input MC A c CC 20 MC B d DD 23 Req...

Страница 138: ...ecifies the mechanical and electrical characteristics of the interface for connecting Data Terminal Equipment DTE and Data Communications Equipment DCE This applies to both asynchronous and synchronou...

Страница 139: ...ration The RS 232 C interface provides a Send Timing ST clock signal at the modem data rate This signal may be set to NORMAL or INVERT at jumper P3 on the Interface board In the INTERNAL clock mode th...

Страница 140: ...data bit The Request to Send RTS line is hard wired to the Clear to Send CTS line by JP11 pins 5 and 6 on the Demodulator M C card AS 4973 since the modem does not support polled operation Data Mode D...

Страница 141: ...232 C interface is provided on a 25 pin D female connector DCE accessible from the rear panel of the modem Screw locks are provided for mechanical security of the mating connector Signal Function Name...

Страница 142: ...ry to remove the top cover of the modem to make an interface change The interface daughter cards are as follows Interface Daughter Card RS 422 AS 2524 V 35 34 pin 25 pin AS 2532 AS 4326 RS 232 C AS 25...

Страница 143: ...pical eye pattern and constellation pictures 5 1 1 Interface Checkout 1 Set modem to IF Loopback Configuration Interface menu 2 Set the TX Data Rate and RX Data Rate to valid data code rates 3 Turn IF...

Страница 144: ...ncy and power level for the demodulator to lock to the signal Refer to Figure 5 2 and Table 5 1 to check for proper Eb N0 level Figure 5 2 is an example of a 1 2 rate carrier operating at an Eb N0 of...

Страница 145: ...ev 0 5 3 Figure 5 1 Typical Output Spectrum ATTEN 10 dB 1 dB DIV RL 53 0 dBm CENTER 70 0000 MHz RBW 3 0 kHz VBW 3 0 Hz SPAN 200 0 kHz SWP 56 0 sec 5 dB E N of Noise 64 kbit s 1 2 Rate QPSK b 0 Figure...

Страница 146: ...2 9 0 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...

Страница 147: ...SDM 100A Satellite Modem Maintenance Rev 0 5 5 WITH NOISE WITHOUT NOISE Figure 5 3 Typical Eye Constellations...

Страница 148: ...13 TT Terminal Timing Transmit Clock TP 14 RD Receive Data TP 15 RT Receive Timing TP 16 GND Ground TP 11 GND Ground TP 31 IF SYNTH REF R143 must be populated IF Synthesizer Reference TP 36 RX CLK Bu...

Страница 149: ...symbol frequency and not at the data rate The frequency is equal to BPSK 2X Bit Clock QPSK1 2 Bit Clock QPSK3 4 2 3 X Bit Clock QPSK7 8 4 7 X Bit Clock TP 4 Q DIGITAL FILTER Analog output from the dig...

Страница 150: ...L T L E D R X F A U L T L E D R X F A U L T L E D C O M E Q F A U L T L E D C O M E Q F A U L T L E D C O M E Q F A U L T R E L A Y C O M E Q F A U L T R E L A Y T X F A U L T R E L A Y T X F A U L T...

Страница 151: ...odule for the location of the configuration identification Refer to Table 5 2 for a list of part numbers and descriptions of various modules used in the modem Table 5 2 EFData Part Numbers for Various...

Страница 152: ...Maintenance SDM 100A Satellite Modem 5 10 Rev 0 This page is intentionally left blank...

Страница 153: ...e 28 pin DIP version applicable to the SDM 100 and 150 A 1 General Remote controls and status information are transferred via an RS 485 optional RS 232 C serial communications link Commands and data a...

Страница 154: ...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 A 2 2 Device Address The device address is...

Страница 155: ...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...

Страница 156: ...ASYNC baud rate is higher than allowable for the new data rate the maximum baud rate will be selected automatically Modulator Rate Preset Selection Command Response Status add SMRx_ cr add SMRx_ cr R...

Страница 157: ...r lf Where xxxx INTL INTELSAT OPEN NETWORK EFD EF DATA CLOSED NETWORK CSC COMSTREAM CLOSED NETWORK FDC FAIRCHILD CLOSED NETWORK or SDM51 SDM51 COMPATIBLE Modulator Encoder Type Command Response Status...

Страница 158: ...DRx_ cr lf See DR command Where x A B C D or V Preset designator Demod Rate Variable Assignment Selection Command Response Status add SDRV_nnnn_mmm mmm cr add SDRV_nnnn_mmm mmm cr lf See DR command Wh...

Страница 159: ...dd DT_xxxx cr add DT_xxxx cr lf Where xxxx INTL INTELSAT OPEN NETWORK EFD EF DATA CLOSED NETWORK CSC COMSTREAM CLOSED NETWORK or FDC FAIRCHILD CLOSED NETWORK Demod Decoder Type Command Response Status...

Страница 160: ...ed clock phasing Baseband Loop Back Command Response Status Response add BBL_xxx cr add BBL_xxx cr lf add BBL_ cr add BBL_xxx cr lf Where xxx ON or OFF Interface Buffer Size Buffer size programming is...

Страница 161: ...n dBm Note Only valid when ADPCM board is installed Interface RD Signal Command Response Status Response add RD_xxx cr add RD_xxx cr lf add RD_ cr add RD_xxx cr lf Where xxx NRM or INV Note Only valid...

Страница 162: ...nsmit Overhead Channel Parity Command Response Status Response add TOCP_xxxx cr add TOCP_xxxx cr lf add TOCP_ cr add TOCP_xxxx cr lf Where xxxx ODD EVEN or NONE Note Only valid when ASYNC board is ins...

Страница 163: ...nal Command Command Response add ISRR_xxx cr add ISRR_xxx cr lf Where xxx NRM or INV Note Only valid when ASYNC board is installed Interface DM Signal Command Command Response add ISDM_xxx cr add ISDM...

Страница 164: ...ed transmit faults are inhibited RTS TX IF Control Mode Command Response Status Response add RTSM_xxx cr add RTSM_xxx cr lf add RTSM_ cr add RTSM_xxx cr lf Where xxx ON or OFF This command configures...

Страница 165: ...Response add LCL_xxxx cr add LCL_xxxx cr lf add LCL_ cr add LCL_xxxx cr lf Where xxxx HOLD NOM or MAX power level setting when local carrier loss AUPC Remote Carrier Loss Action Command Response Statu...

Страница 166: ...cr MSR_xxx cr RSEN_xxx cr lf RF Output ON OFF Modulator Frequency Modulator Rate Preset A Assignment Preset B Assignment Preset C Assignment Preset D Assignment Preset V Assignment Modulator Power Off...

Страница 167: ...lock Source Transmit Clock Phase Baseband Loopback Interface ADPCM Programming Interface Subscriber Trunk Emulation Interface E M Signal Type Interface Transmit Encoding Law Interface Transmit Service...

Страница 168: ...r RSDE_xxx cr lf Demodulator Frequency Demodulator Rate Preset A Assignment Preset B Assignment Preset C Assignment Preset D Assignment Preset V Assignment Descrambler Enable ON OFF Differential Decod...

Страница 169: ...cy Sweep Width Range Receive BPSK Data Ordering Buffer Clock Source Receive Clock Phase Baseband Loop Back Interface Buffer Programming Interface Buffer Size Interface ADPCM Programming Interface Subs...

Страница 170: ...ding Law Interface Off Hook Alert Enable Interface Transmit Service Channel Level Interface Receive Service Channel Level Interface RD Signal Interface SD Signal Interface RR Signal Interface DM Signa...

Страница 171: ...x cr AGC_xxx cr SFLT_xx cr lf RF Output ON OFF Actual Status Not Config Module OK FLT IF Synthesizer OK FLT Data Clock Synthesizer OK FLT I Channel OK FLT Q Channel OK FLT AGC Level OK FLT Number of S...

Страница 172: ...computational resolution of the system 2 No Data is returned if the Eb N0 cannot be calculated 3 Sampling is returned if not enough data is currently available to calculate the Eb N0 Modulator Rate S...

Страница 173: ...og Loopback Jumper Status Status Response add ALBJ_ cr add ALBJ_xxx cr lf Where xxx ON or OFF Note Only valid when ADPCM board is installed Bulk Consol Analog Status Command Response add BCAS_ cr add...

Страница 174: ...eter 6 p6 Modulator preset C assignment ref ARMC_ command p6 nnnn_mmm mmm code rate data rate in kbit s Parameter 7 p7 Modulator preset D assignment ref ARMD_ command p7 nnnn_mmm mmm code rate data ra...

Страница 175: ...meter 30 p30 BER threshold ref BERT_ command p30 xxxx BER threshold Parameter 31 p31 Demodulator type ref DT_ command p31 n where n is 0 EFD 1 INTL 2 CSC or 3 FDC Parameter 32 p32 Demodulator decoder...

Страница 176: ...S 422 Data Mode Signal Programming ref DM_ command Note 1 p53 n where n is 0 NORMAL or 1 INVERT Parameter 54 p54 ADPCM Audio Loopback Jumper Status ref ALBJ_ command Note 1 p54 n where n is 0 off or 1...

Страница 177: ...ter 73 p73 ASYNC Interface RR Signal ref IRR_ command Note 2 p73 n where n is 0 NORMAL or 1 INVERT Parameter 74 p74 ASYNC Interface DM Signal ref IDM_ command Note 2 p74 n where n is 0 NORMAL or 1 INV...

Страница 178: ...revision or A to Z DATA ROM Firmware Information Command Response add DFI_ cr add DFI_ cr DSP_FW nnnnnn ddr cr DSP_mm dd yy cr FPGA_FW nnnnnn ddr cr FPGA_mm dd yy cr lf Where nnnnnn Firmware number 0...

Страница 179: ...eturned if the error rate cannot be calculated 3 Sampling is returned if not enough data is currently available to calculate the error rate Corrected BER Command Response add CBER_ cr add CBER_xm mE e...

Страница 180: ...Module OK FLT Carrier Detect OK FLT IF Synthesizer Lock OK FLT I Channel OK FLT Q Channel OK FLT Descrambler OK FLT BER Threshold OK FLT Interface Transmit Side Stored Faults Command Response add ITSF...

Страница 181: ...ays Bit 5 IF Synthesizer Bit 4 Data Clock Synthesizer Bit 5 I Channel Bit 2 Q Channel Bit 1 AGC Level Bit 0 reserved Character c Modulator fault status character 3 Bit 6 1 always Bit 5 reserved Bit 4...

Страница 182: ...Bit 4 Buffer Underflow Bit 3 Buffer Overflow Bit 2 ADPCM Receive Audio Clip See Note Bit 1 ADPCM Demultiplexer Lock See Note Bit 0 Remote Off Hook See Note Note These bits will only be set if ADPCM i...

Страница 183: ...al data input and output These interfaces can be selected via the front panel RS 485 or RS 232 C interfaces are available for ASYNC channel input and output These interfaces can also be selected from...

Страница 184: ...Options SDM 100A Satellite Modem B 2 Rev 0 Figure B 1 ASYNC AUPC Block Diagram...

Страница 185: ...roblem conditions if chosen Minimum Power Sets minimum output power to be used Maximum Power Sets maximum output power to be used Target Noise Desired Eb N0 of the local modem Tracking Rate Sets speed...

Страница 186: ...must select the ASYNC data interface type from the front panel under the UTILITY INTERFACE menu Once selected the I O data is routed to and from the appropriate drivers and receivers B 1 1 3 Multiple...

Страница 187: ...te drivers to the end user The AUPC data is also stripped from the frame structure and is sent to the M C via a serial interface B 1 1 5 Buffer Operation The buffer has two serial interfaces to the M...

Страница 188: ...output from the DEMUX are also looped to the terrestrial data and clock input at the MUX B 1 1 8 Non ASYNC Operation The ASYNC interface has pass through capability If ASYNC is turned off in the CONFI...

Страница 189: ...r lower If DR 64 000K Baud rate can be 1200 or lower If DR 128 000K Baud rate can be 2400 or lower If DR 512 000K Baud rate can be 4800 or lower If DR 256 000K Baud rate can be 9600 or lower If DR 102...

Страница 190: ...J1 is disconnected 3 Remove the interface B 1 2 3 EPROM Installation Install the two EPROMs that are provided into the now exposed bottom card AS 4973 The EPROMs are marked U207 and U209 to help ident...

Страница 191: ...TX UART to the desired number of data bits RX Length This option programs the RX UART to the desired number of data bits TX Parity This option programs the TX UART for the desired parity RX Parity Thi...

Страница 192: ...d Loopback This option sets the remote modem into the baseband loopback mode Terrestrial This option selects the interface type for the terrestrial data ASYNC This option selects the interface type fo...

Страница 193: ...SEND DATA 38 SD_B SEND DATA 35 EXC_A EXT CLOCK MC MASTER CLOCK 19 EXC_B EXT CLOCK MC MASTER CLOCK 39 RD_A RECEIVE DATA 40 RD_B RECEIVE DATA 4 TXD_B TX DATA ASYNC CHANNEL 5 TXD_A TX DATA ASYNC CHANNEL...

Страница 194: ...es B 2 1 Theory of Operation The ADPCM interface is designed to simulate either a trunk or a subscriber circuit Refer to Figure B 2 The E M circuitry supports types 1 to 5 Trunk or Subscriber configur...

Страница 195: ...SDM 100A Satellite Modem Options Rev 0 B 13 M O D E M T E R R E S T R I A L Figure B 3 ADPCM Block Diagram...

Страница 196: ...e exchange now occurs as the data is input to a FIFO in the MUX where 1 15 proportional IBS type framing overhead is added The multiplexed data is output to the modulator In pass through mode 64 kbit...

Страница 197: ...r Refer to Section B 2 3 for pinout specifications The jumper positions are identified on the PCB with a Data side and an ADPCM side When the jumper is installed on the Data side the modem will not al...

Страница 198: ...the user to chose which E M signaling type is selected Types 1 through 5 are supported Encoding Type This option configures the audio channel to support either A law or law encoding TX Channel Level T...

Страница 199: ...TX and TX lines of the interface B 2 2 6 RX Alarm Indication With the ADPCM option turned on the RX alarm LED will come on if an excessive input level is received by the DEMUX B 2 2 7 DEMUX Lock With...

Страница 200: ...echanical RJ11 Pin Name 1 TX 2 TX 3 RX 4 RX 5 E 6 M With Protection Switch Jumper on Data With Protection Switch Jumper on ADPCM Signal Function Pin Name Name SIGNAL GROUND 1 19 20 27 SG SEND DATA 4 2...

Страница 201: ...ion B 3 2 1 and the Reed Solomon decoder Section B 3 2 2 CHASSIS INTERFACE CDRDATA LOOPBACK TX DATA TX CLK MUXDATA MUX CLK INTERFACE PCB MUX CDR CLK DECDATA OVERHEAD PROCESSOR RX DATA LOOPBACK MUX DMX...

Страница 202: ...front panel as required by the user If the scrambler is disabled the data passes through the scrambler unaltered The data then passes through a serial parallel converter which changes the data to an 8...

Страница 203: ...ceiving end of the satellite link To allow the decoder to synchronize to the data four unique words are inserted in the last two bytes of the last two pages at the end of each page of data Figure B 6...

Страница 204: ...ERATOR U10 RS TIMING CONTROLLER U10 Figure B 7 Reed Solomon Decoder Section Block Diagram The data and the clock signals come from the demultiplexer on the interface PCB and are sent to the Reed Solom...

Страница 205: ...tes appended to the end of the data The terms k n and t will vary depending on the data rate being used The Codec then sends the corrected data to a FIFO Because the check bytes are not part of the re...

Страница 206: ...Options SDM 100A Satellite Modem B 24 Rev 0 This page is intentionally left blank...

Страница 207: ...re ASYNC Asynchronous AUPC Automatic Uplink Power Control BB Baseband BER Bit Error Rate bit s bits per second BPSK Bi Phase Shift Keying C Celsius CCITT International Telephone and Telegraph Consulta...

Страница 208: ...Quadrature I O Input Output IBS INTELSAT Business Service IDR Intermediate Data Rate IESS INTELSAT Earth Station Standards IF Intermediate Frequency kbit s Kilobits Per Second 103 bits per second kHz...

Страница 209: ...l Clock Receive SCT Serial Clock Transmit SCTE Serial Clock Transmit External SD Send Data SN Signal to Noise Ratio ST Send Timing TP Test Point TT Terminal Timing TTL Transistor Transistor Logic TX T...

Страница 210: ...Glossary SDM 100A Satellite Modem g 4 Rev 0 This page is intentionally left blank...

Страница 211: ...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 212: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...

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