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SLM-3650 Satellite Modem

Revision 3

Theory of Operation

MN/SLM3650.IOM

4–4

4.1.2

Remote Baud Rate

The remote communications baud rate and parity are programmed by the front panel
control in the Utility System menu (refer to

Chapter 3

). The programmed baud rate and

parity are maintained indefinitely in RAM on the M&C module. The parity bits can be
set to EVEN or ODD. The available baud rate are listed below:

•

150

•

300

•

600

•

1200

•

2400

•

4800

•

9600

•

19200

4.1.3 Remote

Address

To communicate with the established remote communications protocol, configure each
modem for one address between 1 and 255. Each modem on a common remote
communications link (EIA-485) must have a distinct address. Use the front panel control
in the

Function Select: Utility: System

menu (

Chapter 3

) to program the address.

An EIA-485/EIA-232 communications link remotely controls and monitors all modem
functions. Use the 2- or 4-wire, half-duplex EIA-485 interface to connect between two or
more modems and switches on a common communications link. Use the EIA-232
interface to communicate with a single modem.

Note:

Address 0 is reserved as a global address which simultaneously addresses all

devices on a given communications link.

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Summary of Contents for SLM-3650

Page 1: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

Page 2: ...Number MN SLM3650 IOM Revision 3 SLM 3650 Satellite Modem 2 4 kbps to 5 0 Mbps Installation and Operation Manual Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg...

Page 3: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 4: ...85281 USA 480 333 2200 FAX 480 333 2161 SLM 3650 Satellite Modem 2 4 kbps to 5 0 Mbps Installation and Operation Manual Part Number MN SLM3650 IOM Field Revision 3 October 19 2004 Comtech EF Data is a...

Page 5: ...tact us via the web at www comtechefdata com To return a Comtech EF Data product in warranty and out of warranty for repair or replacement 1 Request a Return Material Authorization RMA number from the...

Page 6: ...fications 1 16 1 5 1 Viterbi Decoder BER 1 16 1 5 2 INTELSAT Viterbi with Reed Solomon Codec BER 1 18 1 5 3 Viterbi Sequential Closed Network Connection BER with Reed Solomon 1 20 1 5 4 Sequential Dec...

Page 7: ...omon 2 29 2 5 2 Install Duplex Reed Solomon Board and Firmware 2 30 2 5 3 Duplex Reed Solomon Set up 2 31 CHAPTER 3 OPERATION 3 1 3 1 Front Panel 3 1 3 2 Revision Emulation Operation 3 4 3 3 Data Rate...

Page 8: ...em Defaults 4 5 4 2 Modulator 4 7 4 2 1 Modulator Specifications 4 8 4 2 2 Theory of Operation 4 11 4 2 3 Theory of Modulation Types 4 12 4 3 Demodulator 4 14 4 3 1 Demodulator Specifications 4 15 4 3...

Page 9: ...odem Revision 3 Preface MN SLM3650 IOM vi APPENDIX A OPTIONS A 1 APPENDIX B REMOTE CONTROL OPERATION B 1 GLOSSARY g 1 INDEX i 1 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURC...

Page 10: ...re 2 9 Card Removal 2 27 Figure 2 10 Turbo Codec Card Installation 2 28 Figure 3 1 Front Panel View 3 1 Figure 3 2 Keypad 3 3 Figure 3 3 Main Menu 3 7 Figure 3 4 Configuration Modulator Menu 3 8 Figur...

Page 11: ...Diagram A 57 Figure A 13 Receive Section of the Asymmetrical Loop Timing Block Diagram A 58 Figure A 14 Reed Solomon PCB A 61 Figure A 15 Reed Solomon Codec Block Diagram A 62 Figure A 16 Reed Solomo...

Page 12: ...e 2 10 AUX 1 Connector and Pinouts J9 2 18 Table 2 11 Alarms Connector and Pinouts J10 2 19 Table 3 1 LED Indicators 3 2 Table 3 2 SLM 3650 Revision Emulation 3 4 Table 3 3 Modem Types 3 78 Table 3 4...

Page 13: ...tion A 50 Table A 16 IDR Modem Defaults A 51 Table A 17 IBS Specification A 54 Table A 18 IBS Modem Defaults A 55 Table A 19 G 703 Specifications A 60 Table A 20 Specifications A 62 Table A 21 Reed So...

Page 14: ...anual Comtech EF Data UB 300 Universal Breakout Panel Installation and Operation Manual Comtech EF Data UB 54 Universal Breakout Panel Installation and Operation Manual Comtech EF Data SDR 54A Satelli...

Page 15: ...us injury IMPORTANT IMPORTANT indicates a statement that is associated with the task being performed Metric Conversion Metric conversion information is located on the inside back cover of this manual...

Page 16: ...he European Electro Magnetic Compatibility EMC Directive EN55022 EN50082 1 properly shielded cables for DATA I O are required More specifically these cables must be shielded from end to end ensuring a...

Page 17: ...F Data specifically disclaims the implied warranties of merchantability and fitness for particular purpose Exclusive Remedies The remedies provided herein are the buyer s sole and exclusive remedies C...

Page 18: ...is a high performance full duplex digital vector modulator demodulator that meets the open network requirements of the INTELSAT Earth Station Standards IESS 308 309 310 and 315 Turbo only emulation sp...

Page 19: ...features Fully Accessible System Topology FAST refer to Appendix A Differential Encoder Decoder Built in Scramblers Descramblers TX and RX Frequency Synthesizers Multi rate FEC convolutional Viterbi...

Page 20: ...terface card is used for control between two links to sustain sufficient transmit power to maintain a programmed Eb N0 at both ends The second method is used for self monitoring the carrier from the s...

Page 21: ...d TPC Forward Error Correction 1 2 21 44 5 16 3 4 7 8 1 1 or 2 3 Symbol rate of 4 8 ks s to 2 5 Ms s Note The modem can be configured to add overhead framing to the data Available modulation types inc...

Page 22: ...e 1 2 and consists of from two to five Printed Circuit Boards PCBs depending on the configuration The modem consists of two major replaceable assemblies as follows Rear panel main PCB and power supply...

Page 23: ...ESS 310 Requires Viterbi and Reed Solomon Codec 8 PSK 2 3 rate EFD Mode Requires Viterbi Codec Turbo Codec Requires Turbo Codec Asynchronous Overhead Includes automatic uplink power control AUPC IBS a...

Page 24: ...AST OPTIONS SEQUENTIAL or VITERBI DECODER see Note 1 FAST OPTIONS LOW VARIABLE DATA RATE up to 512 kbps HIGH VARIABLE DATA RATE up to 4 375 Mbps SEQUENTIAL or VITERBI DECODER ASYMMETRICAL LOOP TIMING...

Page 25: ...r only one can be used at a time 1 2 2 Factory Installed Options Consult a Comtech EF Data Customer Support representative for modem options The following options are installed at the factory Output I...

Page 26: ...gure 1 3 for a system block diagram M C AUX CIRCUITS SAT CLK FAULT RELAYS ALARM RELAYS 5 TO 20 DBM OPTION SATELLITE MODEM BOP UB 530 CUSTOMER DATA I O AUX 1 TTL FAULTS FAULT FORM C CONTACTS ALARMS FOR...

Page 27: ...ation and Operation Manual 1 2 4 2 UB 530 Breakout Panel Alternate part for UB 300 The UB 530 functions the same as UB 300 except the UB 530 has an EIA 530 25 pin Data I O connector at J3 For more inf...

Page 28: ...em Assy 50 TNC H S 10 7 5 dB Power Out with Antenna PL 6284 TX Reed Solomon Assy PCB PL 6285 RX Reed Solomon Assy PCB Without Antenna PL 6285 1 RX Reed Solomon Assy PCB With Antenna PL 6451 Flex MUX P...

Page 29: ...ld selectable Elastic Buffer 32 to 262144 bits selectable from front panel in bits or ms Digital Data Rate 2 4 kbps to 5 0 Mbps in 1 bit s steps front panel selection Scrambling Descrambling Types IES...

Page 30: ...including container Size Weight 9 H x 21 W x 20 D 23 H x 53 W x 51 D cm 17 lbs 8 kg approximate Environmental Temperature Humidity 0 to 50 C 32 to 122 F 0 to 95 non condensing Additional Modulator Spe...

Page 31: ...rential Encoding and Decoding Code and Decode Rate Transmit and Receive Overhead Type Acquisition Sweep Parameters Buffer Size IDR Backward Alarm Control On Off Reed Solomon On Off Mod and Demod Spect...

Page 32: ...1 to 10 6 Performance measurements were recorded with transmit and receive IF connected back to back through an additive white Gaussian noise channel Refer to Figure 1 4 for the Viterbi BER curves Ta...

Page 33: ...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 IBS 1 2 Rate IDR 3 4 Rate IDR 7 8 Rate SPECIFICATIONS Figure 1 4 Viterbi BER Performance Curves Artisan Technol...

Page 34: ...rations Refer to Figure 1 5 for the INTELSAT Viterbi with Reed Solomon BER curves Table 1 6 INTELSAT Viterbi with Reed Solomon BER Data Specification Typical IBS IDR IBS IDR BER 1 2 Rate 3 4 Rate BER...

Page 35: ...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 IBS 1 2 Rate IDR 3 4 Rate SPECIFICATIONS Figure 1 5 INTELSAT Viterbi with Reed Solomon BER Performance Curves Artisan...

Page 36: ...0 required to achieve 10 6 to 10 10 BER for different configurations Refer to Figure 1 6 Viterbi Sequential Closed Network Connection with Reed Solomon BER Performance Curves Table 1 7 Viterbi Sequent...

Page 37: ...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 SPECIFICATIONS 3 4 RATE 7 8 RATE Figure 1 6 Viterbi Sequential Closed Network Connection with Reed Solomon BER Performance...

Page 38: ...uential BER curves Table 1 8 Sequential BER Data 56 kbps Specification Typical BER 1 2 Rate 3 4 Rate 7 8 Rate 1 2 Rate 3 4 Rate 7 8 Rate 10 3 4 6 dB 5 5 dB 4 1 dB 5 0 dB 10 4 4 1 dB 5 1 dB 6 1 dB 3 6...

Page 39: ...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 7 8 Rate SPECIFICATIONS Figure 1 7 Sequential BER Specification Curves 56 kbps Artisan Techno...

Page 40: ...R curves Table 1 9 Sequential Decoder BER Data 1544 kbps Specification Typical BER 1 2 Rate 3 4 Rate 7 8 Rate 1 2 Rate 3 4 Rate 7 8 Rate 10 3 4 8 dB 5 2 dB 6 0 dB 4 3 dB 4 7 dB 5 5 dB 10 4 5 2 dB 5 7...

Page 41: ...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 7 8 Rate SPECIFICATIONS Figure 1 8 Sequential Decoder BER Specification Curves 1544 kbps Artisan T...

Page 42: ...on All values are for operating in 8 PSK mode Refer to Figure 1 9 for the 8 PSK curves Table 1 10 8 PSK Specification 2 3 8 PSK with R S 2 3 8 PSK without R S BER Spec Typical Spec Typical 10 4 6 1 5...

Page 43: ...OM 1 26 10 10 10 10 10 10 10 5 0 BER 6 0 7 0 8 0 9 0 10 0 11 0 E N db b 0 WITH REED SOLOMON WITHOUT REED SOLOMON 2 3 4 5 6 7 8 Figure 1 9 8 PSK BER Specification Curves Artisan Technology Group Qualit...

Page 44: ...1 44 Rate 5 16 Rate 3 4 Rate 10 6 3 0 3 9 2 8 see Note 7 0 10 7 3 2 4 1 3 1 see Note 7 3 10 8 3 5 4 3 3 3 see Note 7 6 10 9 3 8 4 8 3 7 4 0 8 0 Note 5 16 BPSK is included for compatibility with other...

Page 45: ...0 Turbo Product Codec 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 1 0 2 0 3 0 4 0 Eb N0 dB 5 0 6 0 7 0 8 0 9 0 10 2 BPSK 21 44 Rate QPSK OQPSK 3 4 Rate 8PSK 3 4 Rate QPSK OQPSK 1 2 Rate Artisan Techn...

Page 46: ...ting in uncoded mode Refer to Figure 1 11 for uncoded values Table 1 12 Uncoded Values Uncoded BER 1 1 Rate 10 3 8 0 10 4 9 6 10 5 10 8 10 6 11 6 10 7 12 4 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10...

Page 47: ...ion MN SLM3650 IOM 1 30 Figure 1 12 shows a typical spectral occupancy curve using the Comtech EF Data filter mask Figure 1 12 Typical Spectral Occupancy Artisan Technology Group Quality Instrumentati...

Page 48: ...Note Dimensions are listed in inches and centimeters are noted in parentheses Refer to Figure 1 13 1 75 4 4 19 0 4 8 1 25 3 2 14 0 36 3 0 8 3 625 9 2 3 625 9 2 Figure 1 13 SLM 3650 Dimensional Drawin...

Page 49: ...tion CAUTION Do not use any cutting tool that will extend more than 1 inch into the container This can cause damage to the modem Unpack the modem as follows 1 Cut the tape at the top of the carton ind...

Page 50: ...k and slide the screw with flat washer through the slot of the mounting bracket Tighten the screw sufficiently to allow the modem chassis to slide in the bracket 3 Connect the cables to the proper loc...

Page 51: ...3650 Satellite Modem Revision 3 Installation MN SLM3650 IOM 2 3 Figure 2 1 Installation of the Mounting Bracket Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg...

Page 52: ...n REMOTE J6 9 pin D Remote Interface FAULT J7 9 pin D FORM C Fault Relay Contacts DATA I O J8 25 pin D 34 pin 37 pin D 50 pin D 50 pin D 100 pin D 15 pin D BNC Data Input Output standard modem V 35 EI...

Page 53: ...Option 50 Pin D Connector J6 REMOTE ALARMS J10 FAULT J7 J9 AUX 1 EX REF RX IF INPUT CP3 CP1 CP2 TX IF OUTPUT Figure 2 4 V 35 34 Pin Winchester Connector J6 REMOTE ALARMS J10 FAULT J7 J9 AUX 1 EX REF R...

Page 54: ...ia cable to the remote connector This is a DCE interface that is user selectable for either EIA 485 or EIA 232 Refer to Appendix B for a description of the remote interface Refer to Table 2 2 for pino...

Page 55: ...nector Refer to Table 2 3 for pinout information Table 2 3 Fault Connector and Pinouts J7 Pin Signal Function Name 1 Common equipment is not faulted NO 2 COM 3 Common equipment is faulted NC 4 Modulat...

Page 56: ...witches 37 pin D is an alternate connector available upon special request for the base platform modem 34 pin Winchester is an alternate connector available upon special request for the base platform m...

Page 57: ...SCT A 16 RD B RD B 17 RT A RXC SCR A 18 LL LL LL 19 EIA B 20 MC A MC MC A 21 DF DF DF 22 DM B 23 MC B MC B 24 TT A TXC SCTE A 25 MF MF MF Note Use the MASTER clock for EXTERNAL clock input This clock...

Page 58: ...TCLK Out EIA 232 26 BWO2_NC ESC RCLK Out EIA 232 27 BWO3_NC PRIMARY_NC PRIMARY_NC 28 BWO4_NC SECONDARY_NC SECONDARY_NC 29 Aud1 B In or 64SDB V 35 EIA 422 RTS B V 35 EIA 422 RTS B 30 Aud1 B Out or 64RT...

Page 59: ...m d Relay contacts DF C and DF NO are named for faulted condition DF C connected to DF NO unless demodulator Demod fault 2 D I ASYNC interface connector pinouts a With regard to alarm relay contacts C...

Page 60: ...7 A B 21 DF 21 NN n 22 SD B 14 S 23 ST B 12 AA a 24 RD B 16 T 25 RTS B 19 N A 26 RT B 9 X 27 CTS B 13 N A 29 DM B 22 N A 31 RR B 10 N A 34 MC B 23 DD d There are jumpers on the PL 6031 EIA 422 interfa...

Page 61: ...ection The SLM 3650 is available with a Winchester V 35 as the data I O connector PL 6032 There is a jumper on the unit that either opens or closes the CC line The interface is shipped with jumpers in...

Page 62: ...red connector will be reinstalled However the operator does have an option to install a different configured connector Refer to Table 2 8 for a matrix explaining connector options Table 2 8 Connector...

Page 63: ...I O Connector J8 Installation 1 For Ribbon Configured Connector PL 6031 Install Data I O connector J8 Figure 2 7 as follows a Position connector J8 in rear panel CAUTION Use care when connecting the...

Page 64: ...MN SLM3650 IOM 2 16 For Ribbon Configured Connector For 50 Pin Connector with Overhead Interface Board Figure 2 7 Data I O Connector J8 Removal Installation Artisan Technology Group Quality Instrument...

Page 65: ...orts the 75 unbalanced Master Clock interface 15 Pin Connector The 15 pin D connector supports G 703 balanced TX and RX data Balanced Master Clock Open collector Mod and Demod fault Asynchronous overh...

Page 66: ...to 10V for a receive signal level between 25 and 60 dBm AUX 1 connection is a 9 pin female D connector J9 located on the rear panel of the modem Screw locks are provided for mechanical security on th...

Page 67: ...security on the mating connector Refer to Table 2 11 for pinout information Table 2 11 Alarms Connector and Pinouts J10 Pin Signal Function Name 1 Alarm 1 is faulted NO 2 COM 3 Alarm 1 is not faulted...

Page 68: ...e selected and demodulated to produce clock and data at the Data I O connector 2 3 8 External Reference CP3 CP3 is a TNC connector for an external reference The input impedance is 50 For normal operat...

Page 69: ...y between these modems and the SLM 3650 is guaranteed Benefits of Turbo Product Code FEC include Enhanced BER Performance QPSK 3 4 rate Turbo provides nearly a 2 dB improvement over Viterbi 3 4 rate c...

Page 70: ...values below 4 0 dB Performance is virtually error free above 4 0 dB Eb No and operation below this level is not recommended 2 4 2 Data Rate Modulation Type Encoding Type Data Rate Range BPSK 5 16 Ra...

Page 71: ...e kit includes the following items Upgrade Kit Part Number KT 9672 1 1 PL 9394 1 Turbo Codec Module 2 FW 6535 1V or later version M C firmware 3 FW 6094W or later version Bulk firmware 4 Installation...

Page 72: ...all normal precautions for handling electrostatic sensitive devices 10 4 10 3 10 5 10 6 BER 10 7 10 9 10 8 10 10 1 0 2 0 3 0 4 0 Eb N0 dB 5 0 6 0 7 0 8 0 9 0 10 2 BPSK 21 44 Rate QPSK OQPSK 3 4 Rate 8...

Page 73: ...lation refer to Figure 2 11 If replacement Firmware IC s were sent with the Turbo Board remove existing Firmware U86 and U74 with PLCC type IC puller If puller is not available use ice pick type tool...

Page 74: ...reen reads Utility Modulator then press the Enter key 5 Press the arrow key until the screen reads Encoder Type then press the Enter key then key to get Turbo press Enter 6 Press Clear then press the...

Page 75: ...ite Modem Revision 3 Installation MN SLM3650 IOM 2 27 Figure 2 9 Card Removal I O MODULE SIMM SOCKETS CARD 1 OVERHEAD BOARD Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE ww...

Page 76: ...te Modem Revision 3 Installation MN SLM3650 IOM 2 28 Figure 2 10 Turbo Codec Card Installation U74 U86 TURBO CODEC INSTALLED Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE w...

Page 77: ...Module 2 FW 6535 1AA or later version M C firmware 3 FW 6094W or later version Bulk firmware 4 Installation instructions 5 FW 9600C or later version Turbo Firmware if Turbo is installed The modems mus...

Page 78: ...existing Firmware U86 and U74 with PLCC type IC puller If puller not available use ice pick type tool to alternately carefully pry upward at opposite corners of IC 7 Install the replacement Firmware...

Page 79: ...ed the Reed Solomon option is avalible as normal under Configuration Modulator Demodulator menu Figure 2 11 Duplex Reed Solomon Setup I O MODULE SIMM SOCKETS CARD 1 OVERHEAD BOARD Card Slot 2 Card Slo...

Page 80: ...evision 3 Installation MN SLM3650 IOM 2 32 Figure 2 12 Installation of Duplex Reed Solomon U74 U86 DUPLEX REED SOLOMON CODEC INSTALLED Artisan Technology Group Quality Instrumentation Guaranteed 888 8...

Page 81: ...enables control of modem configuration parameters and displays the modem status SATELLITE MODEM TRANSMIT RECEIVE TRANSMIT RECEIVE COMMON STORED POWER ON TRANSMITTER ON CARRIER DETECT TEST MODE A L A R...

Page 82: ...it chain Receive Red A fault condition exists in the receive chain Common Red A common equipment fault condition exists Stored Yellow A fault has been logged and stored The fault may or may not be act...

Page 83: ...y to the previous selection Left and Right Diamond Keys ef These keys are used to move to the next selection or to move the cursor for certain functions Note Throughout this chapter and are used to in...

Page 84: ...1 W Updated menus to reflect current application 7 1 13 FW6535 1 AP Updated menus to reflect current application 7 1 16 FW 6535 1 AU Added duplex reed solomon 3 3 Data Rates Code Rate Data Rate Range...

Page 85: ...is Function Select To access this level from the sign on message press the or keys From the Function Select menu select one of the functional categories Configuration Monitor Faults Alarms Stored Faul...

Page 86: ...initiates the necessary programming by the modem To undo a parameter change prior to execution press CLEAR Notes 1 Menus or commands that are specific to certain modem configurations are only accessi...

Page 87: ...re 3 21 UTILITY FACTORY SETUP Figure 3 22 CONFIGURATION SAVE Figure 3 10 ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key FUNCTION SELECT STORED FLTS ALMS Figure 3 14 FUNCTI...

Page 88: ...z RS ENCODER ON OFF Reed Solomon Option only ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key FUNCTION SELECT CONFIGURATION FUNCTION SELECT CONFIGURATION CONFIGURATION MODUL...

Page 89: ...g cursor Press ENTER to execute the change Note When the transmitter frequency is changed the transmitter is automatically turned off to prevent the possible swamping of other channels To turn the tra...

Page 90: ...carrier signal The upper side band is at one quarter of the symbol rate from the carrier When inverted spectrum is selected this generates a single lower side band suppressed carrier Upon entry the C...

Page 91: ...one of the proper overhead types and data rates apply the Reed Solomon Encoder program in the ON state will be rejected double beep Programs the Reed Solomon encoder ON or OFF Upon entry the current s...

Page 92: ...ON 50 TO 180 MHz in 1 Hz steps ON OFF ON OFF Always OFF in Turbo mode ON OFF ON OFF O to 999 Seconds RS DECODER ON OFF CORRECTION_OFF Reed Solomon Option only ACCESS TO SUBMENU CONDITIONAL OR OPTION D...

Page 93: ...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 DESCRAMBLER Pro...

Page 94: ...weep center frequency can be set in the range from 35000 to 35000 Hz Upon entry the current programmed setting is displayed with a flashing cursor on the first character Press or to move the flashing...

Page 95: ...y the current status of the Reed Solomon decoder is displayed Use or to select one of the following modes ON Enables the Reed Solomon decoder to provide data error corrections CORRECTION_OFF Turns off...

Page 96: ...bit steps 1 to 9 ms 0 BYPASS Yes No OFF ON Note TX and RX data rates must match or ASLT option installed TX CODING FORMAT AMI B8ZS HDB3 TX G 703 only RX CODING FORMAT AMI B8ZS HDB3 RX G 703 only TX D...

Page 97: ...S INSERT SAT T SLOT TERR All other Formats RX D I overhead only ASYNC TX BAUD BAUD RATES bps 110 150 300 600 1200 2400 4800 9600 19200 38400 TX ASYNC only ASYNC RX BAUD ASYNC TX LENGTH BAUD RATES bps...

Page 98: ...urrent setting of the TX clock phase is displayed Press or to make the selection When AUTO is selected the modem will automatically select NORMAL or INVERT to properly phase the TX clock with the TX d...

Page 99: ...to select the desired buffer size The buffer size is displayed in seconds or bits Enter the Function Select Utility Interface menu to change the buffer units to seconds or bits If selecting seconds c...

Page 100: ...the current status is displayed or to make the selection Press ENTER to execute the change Conditional This menu is only available when the overhead interface PCB or Reed Solomon PCB is installed LOOP...

Page 101: ...the modem to receive a 2047 pattern as the normal receive data and allows the BER monitor to work on that 2047 pattern Upon entry the current status is displayed Press or to select on or off Press EN...

Page 102: ...Signaling T1_S Special Signaling Upon entry the current drop data channel signal is displayed Press or to make the selection Press ENTER to execute the change Conditional This menu is only available...

Page 103: ...formats Upon entry satellite channel 1 and the current terrestrial frame slot are displayed Press or to select the satellite channel to be programmed Press ENTER to choose the satellite channel to be...

Page 104: ...for 5 6 7 or 8 bits Upon entry the current status of the ASYNC RX word length is displayed Press or to make the selection Press ENTER to execute the change Conditional The menu is only available when...

Page 105: ...nction Select Utility Modem Type ASYNC and requires that the Overhead Card is installed ASYNC RX PARITY Programs the ASYNC overhead receive parity for Even Odd or None Upon entry the current status of...

Page 106: ...0 dBm In 0 5 dBm steps 3 2 to 16 0 dB In 0 1 dB steps 0 5 to 6 0 dBm min In 0 5 dBm min steps HOLD NOMINAL MAXIMUM 5 0 to 30 0 dBm In 0 5 dBm steps 5 0 to 30 0 dB In 0 5 dBm steps HOLD NOMINAL MAXIMU...

Page 107: ...dBm in 0 5 dBm steps Upon entry the current maximum power level is displayed Press or to increment or decrement the digit at the flashing cursor Press ENTER to execute the change TARGET NOISE Program...

Page 108: ...D OR 0 6 to 4000 kbit s in 100bit s steps EIA 232 EIA 422 ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information TRIBUTARY n CLOCK DATA n 1 8 CLK NRM OR INV DATA NRM OR INV TRIBUTARY...

Page 109: ...ecrement the selected kbps Press ENTER to execute the change TRIBUTARY CLOCK DATA Select the tributary 1 8 and program the clock phase to Normal Invert On entry the current status is displayed Press o...

Page 110: ...LED TX CHAN 3 MODE ASYNC RS 232 SYNC RS 232 ASYNC RS 422 SYNC RS 422 AUPC DISABLED TX CHAN 3 DR SYNC RS 422 0 6 to 4000 0 kbit s ALL OTHER MODES 0 6 to 64 0 kbit s TX CHAN 3 PHASE NORMAL INVERTED TX C...

Page 111: ...for D I RX CHAN 2 MODE ADPCM ENABLED ADPCM DISABLED RX CHAN 3 MODE ASYNC RS 232 SYNC RS 232 ASYNC RS 485 SYNC RS 485 AUPC DISABLED RX CHAN 3 DR SYNC RS 422 0 6 to 4000 0 kbps ALL OTHER MODES 0 6 to 6...

Page 112: ...Channel Overhead 3 EIA 232 EIA 422 or AUPC Channel Overhead 4 EIA 232 EIA 485 or AUPC Refer to Figure 3 9 TX CHAN 1 MODE Programs the TX Channel 1 MODE D I Enabled T1 E1 Enabled Disabled Press or to...

Page 113: ...ss or to move the flashing cursor and or to increment or decrement the selected kbps Press ENTER to execute the change TX CHAN 3 PHASE Programs the TX 3 PHASE NRM or INV Note Not displayed if AUPC or...

Page 114: ...I Enabled T1 E1 Enabled Disabled Press or to move the flashing cursor and or to increment or decrement the selected kbps Press ENTER to execute the change RX CHAN 1 DR Programs the RX Channel 1 DR TX...

Page 115: ...nge RX CHAN 3 PHASE Programs the RX 3 PHASE NRM or INV Note Not displayed if AUPC or Disabled is selected Press or to move the flashing cursor and or to increment or decrement the selected kbps Press...

Page 116: ...When calculating the symbol rate based on the programmed code rate D I overhead 16 15 if enabled and Reed Solomon overhead 126 112 or 219 201 if enabled must be included 3 Channels 3 and 4 data rates...

Page 117: ...he M C There are five memory locations that may be used to store specific configuration setups that are frequently used After changing the configuration parameters to the desired settings enter the Co...

Page 118: ...2 CURRENT Eb No or No Data if Carrier is not locked Range 2 0 to 16 0 dB CURRENT RECEIVE LEVEL 10 0 to 60 0 dBm CURRENT SWEEP FREQUENCY 35 000 to 35 000 Hz or No Data if carrier is not locked CURRENT...

Page 119: ...s the current Eb N0 or No Data if carrier is not locked Range 2 0 to 16 0 dB Note Low limit is based on the data rate High limit is 16 0 dB RECEIVE SIGNAL Displays the current receive signal level Ran...

Page 120: ...SLM 3650 Satellite Modem Revision 3 Operation MN SLM3650 IOM 3 40 This page is intentionally left blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 121: ...me For each parameter monitored fault status is displayed as one of the following indicates that no fault or alarm exists indicates that a fault exists and will cause switching in a redundant system R...

Page 122: ...ER CLK ACT DEMUX LOCK RX 2047 LOCK BUFFER FULL RX INSERT RX AUDIO 1 CLIP RX AUDIO 2 CLIP CONFIGURATION BATTERY CLOCK 12 VOLT SUPPLY 12 VOLT SUPPLY 5 VOLT SUPPLY SELF TEST CONTROLLER INTERFACE MODULE B...

Page 123: ...dulator configuration fault 3 4 10 2 Function Select Demodulator Faults CARRIER DETECT Carrier detect fault Indicates the decoder is not locked IF SYNTHESIZER Demodulator IF synthesizer fault Indicate...

Page 124: ...one is selected in the Interface Configuration menu the TX Data AIS Fault Alarm is not activated Note AIS is an alarm not a switching fault TX CLK PLL Transmitter phase locked loop fault Indicates the...

Page 125: ...that the frame BER exceeds 1 3 BACKWARD ALARM Backward alarms BUFFER CLK PLL Buffer clock phase locked loop fault Indicates the buffer clock PLL is not locked BUFFER CLK ACT Activity detector alarm of...

Page 126: ...ndicates that the interface module is missing or will not program 3 4 10 6 Function Select Backward Alarms BW Alarm RX 4 Receive backward alarm 4 indicator BW Alarm RX 3 Receive backward alarm 3 indic...

Page 127: ...uipment fault 0 and common equipment fault 1 respectively On 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...

Page 128: ...EL BUFFER UNDERFLOW BUFFER OVERFLOW RX DATA AIS FRAME BER BACKWARD ALARM BUFFER CLK PLL BUFFER CLK ACT DEMUX LOCK RX 2047 LOCK BUFFER FULL RX INSERT RX AUDIO 1 CLIP RX AUDIO 2 CLIP CONFIGURATION STORE...

Page 129: ...ess ENTER to execute the change Note This program is for control or last known status B BAND LOOPBACK Programs the remote baseband loopback ON or OFF Upon entry the current status of the remote baseba...

Page 130: ...Control or last known status ASYNC option only TX 2047 PATTERN ON OFF Control or last known status ASYNC option only Figure 3 15 Remote AUPC Configuration Menu SLM3650 TYPE VER X X X FUNCTION SELECT...

Page 131: ...rrent Firmware Test Mode Status Overhead Type Revision Emulation Lamp Test Provisions also are made for assigning data and code rates to the modulator and demodulator After entering the Function Selec...

Page 132: ...LE EFD CLOSED NORMAL INVERT MOD SPECTRUM TX BPSK ORDERING ENCODER TYPE STANDARD NON STANDARD VITERBI SEQUENTIAL TURBO 4 8 tp 2500 ksps Status only ON OFF 4 8 16 DEEP TX R S INSTALLED ONLY TX RS INTERL...

Page 133: ...eature does not actually change the modulator power level but displays an offset value in the monitor The modulator power offset range is 99 9 to 99 9 dB in 0 1 dB steps Note Anything except 0 0 dB wi...

Page 134: ...te the change Conditional Only available when 8 PSK option and RS option are installed and selected TX IESS 315 MODE Selection with TURBO Upon entry the current status of the utility menu is displayed...

Page 135: ...CONDITIONAL OR OPTION DEPENDENT ACCESS TO SUBMENU CONTINUOUS or BURST RX MODE DEMOD SPECTRUM NORMAL INVERT 4 8 16 DEEP RX R S INSTALLED ONLY RX RS INTERLEAVE TX RS DUPLEX N 225 K 205 I 8 R S DUPLEX I...

Page 136: ...ve filtering Note CSC Closed Demodulator type is not compatible with a 3 4 Code Rate and Sequential Decoder type DECODER TYPE Conditional Changes only when Modem Type under Function Select Utility Mod...

Page 137: ...RATE Programmable with 4 800 to 2500 kbps Status Only Upon entry the current status of the utility menu is displayed Press or to make the selection Press ENTER to execute the change RX MODE Select Co...

Page 138: ...installed BITS MILLI SECONDS OFF ON RX TERR INTERFACE ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key RS 232 RS 422 V 35 G 703 G 703 only with overhead PCB installed TX DA...

Page 139: ...ALARM TX 3 ON OFF BW ALARM TX 2 ON OFF BW ALARM TX 1 ON OFF IDR only ASYNC RX TYPE RS 232 RS 485 RX ASYNC only ACCESS TO SUBMENU CONDITIONAL OR OPTION DEPENDENT Parameter Information Key IDR RX ESC TY...

Page 140: ...the plesiochronous shift set the buffer units to MILLI SECONDS For a specific buffer depth set the buffer units to BITS FRAMING STRUCTURE Displays the currently selected framing type and structure of...

Page 141: ...ess ENTER to execute the change Conditional This selection is available only when IDR is enabled ASYNC TX TYPE Select EIA 232 EIA 485 4 WIRE or EIA 485 2 WIRE for ASYNC overhead type Conditional Avail...

Page 142: ...GIT SELF TEST OFF AUTO RUN M C FIRMWARE FW NNNNNN DDR MM DD YYYY BOOT FIRMWARE FW NNNNNN DDR MM DD YYYY BOOT FIRMWARE VER X X X TEST MODE STATUS RS CORR OFF INTRFC LOOPBACK B BAND LOOPBACK RF LOOPBACK...

Page 143: ...OPTION DEPENDENT Parameter Information Key EXT AGC MIN PWR 0 0 to 10 0 VOLTS in 0 5 v steps EXT AGC MAX PWR 0 0 to 10 0 VOLTS in 0 5 V steps MASTER RESET HARD SOFT F Figure 3 20 Utility System Menu Co...

Page 144: ...s displayed 1 to 255 To change the remote address press ENTER Press or to make the selection Press ENTER to execute the change REMOTE TYPE Select EIA 485 2 Wire EIA 485 4 Wire or EIA 232 OPERATION MOD...

Page 145: ...menu Press ENTER to begin Press or to increment or decrement the number at the flashing cursor from 0 to 100 Press ENTER to execute the change EXT AGC MIN PWR Sets the AGC voltage for a RX signal lev...

Page 146: ...saves the current configuration settings Select ENTER once to access HARD or SOFT Press or to make the selection Press ENTER Press five times to move the cursor to YES Select YES and press ENTER agai...

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Page 148: ...ITY ASLT VITERBI SEQUENTIAL SINGLE RATE LOW RATE VAR FULL RATE VAR CARD 1 PCB CARD 2 PCB CARD 3 PCB 8PSK TX ONLY RX ONLY OQPSK BURST G G 703 OPERATION UNBALANCED BALANCED G 703 PERSONALITY I O PCB INS...

Page 149: ...TE NOT APPLICABLE FOR TURBO LOCAL MODEM AUPC ON OFF OFF WITH TX RX ASYNC OVERHEAD REED SOLOM0N 02 REED SOLOMON 03 REED SOLOMON DUPLEX TURBO INSTALLED NOT INSTALLED G MODEM SERIAL 123456789 ACCESS TO S...

Page 150: ...e entered the modem will not change any parameters If the modem type is changed to Custom no parameters will be changed If the modem will not allow the modem type selection that type of operation may...

Page 151: ...s ENTER to execute the change Notes 1 Programming a current version default allows all features and options if installed to operate normally 2 Programming a FUNCTIONAL version X eliminates any changes...

Page 152: ...to move from one symbol to the next The first line will display the option The second line will display the status A symbol indicates the option is installed A symbol indicates the option is FAST acce...

Page 153: ...Solomon 02 List Intelsat or AUPC or Reed Solomon 03 List Intelsat or AUPC or Duplex Reed Solomon Intelsat or AUPC or Note Not applicable for Turbo mode Displays installed Reed Solomon options CARD 3 O...

Page 154: ...r on the first character Press or to move the flashing cursor Press or to increment or decrement the digit at the flashing cursor Press ENTER to execute the change Entering this code enables the corre...

Page 155: ...ONAL OR OPTION DEPENDENT Parameter Information Key Figure 3 22 Utility Factory Setup Menu 3 4 14 6 Function Select Utility Factory Setup Refer to Figure 3 22 CAUTION This command is used for factory c...

Page 156: ...ut changing the programmed frequency of the demodulator When RF loopback is turned OFF the demodulator is programmed back to the previous frequency CUSTOMER DATA IBS IDR or 308 2 INTERFACE ENCODER MOD...

Page 157: ...and cabling between the modem and the customer equipment The baseband loopback is not bi directional in D I CUSTOMER DATA IBS or IDR INTERFACE ENCODER MODULATOR TRANSMIT RF EQUIPMENT ANTENNA AC POWER...

Page 158: ...YNC Asynchronous Overhead EFD Comtech EF Data Closed Network CUSTOM Access all modes AUPC Automatic Uplink Power Control VSAT IBS Intelsat compliant No Overhead 3650 00 No Overhead OM 73 3650 02 ASYNC...

Page 159: ...IF Output ON Configuration Demodulator RX Data Code Rate RX V QPSK 3 4 Configuration Demodulator TX Clock Source TX Terrestrial Internal Ext Reference Configuration Interface Buffer Clock Source Satel...

Page 160: ...ype TX Data Code Rate TX V QPSK 1 2 Configuration Modulator TX IF Output ON Configuration Demodulator RX Data Code Rate RX V QPSK 1 2 Configuration Demodulator TX Clock Source TX Terrestrial Internal...

Page 161: ...lock Configuration Interface TX Coding Format HDB3 Configuration Interface RX Coding Format HDB3 Configuration Interface Drop Format E1CCS E1CAS E1 Configuration Interface Insert Format E1CCS E1CAS E1...

Page 162: ...8 Configuration Demodulator Encoder Type Viterbi Sequential Utility Modulator Decoder Type Viterbi Sequential Utility Demodulator ASYNC TX Baud 110 to 38400 bit s Configuration Interface ASYNC RX Bau...

Page 163: ...ible with any Comtech EF Data closed network application The modem can be compatible with other closed network applications by selecting different modulator and demodulator types Fairchild and Comstre...

Page 164: ...703 the modem must have the required G 703 Overhead board installed 3 5 1 6 Custom Operation Note If the modem serves as the backup unit for a rack of modems having different hardware and FAST options...

Page 165: ...ngs Parameter Front Panel Settings Reference Menu Modem Emulation SDM 100 Utility Modem Type TX Data Code Rate TX V QPSK 1 2 Configuration Modulator TX IF Output ON Configuration Modulator RX Data Cod...

Page 166: ...ront Panel Setting Reference Menu Modem Emulation SDM 6000 Utility Modem Type TX Data Code Rate TX V QPSK 1 2 Configuration Modulator TX IF Output ON Configuration Modulator RX Data Code Rate RX V QPS...

Page 167: ...em is an option for both EIA 422 and V 35 operation SCT LOOP SCT INTERNAL clock no longer applies when the modem has loop timing on The TX clock source is now recovered from the RX satellite data This...

Page 168: ...rt to the low stability internal reference automatically 3 6 4 IDR IBS G 703 Master Slave Use this application when the far end earth station does not have local access to a high stability reference c...

Page 169: ...SATELLITE SATELLITE CLOCK RECOVERY CLOCK RECOVERY BUFFER BUFFER RD RD RT RT BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK TX TERRESTRIAL MASTER BOP BOP DTS DTS EXT REF EXT REF RECEIVE RECEIVE SD SD TT TT S...

Page 170: ...TION SATELLITE SATELLITE CLOCK RECOVERY DATA CLOCK BUFFER BUFFER RD RD RT RT BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK RX SATELLITE CLOCK MASTER BOP BOP DTS DTS EXT REF EXT REF RECEIVE SD SD TT TT ST S...

Page 171: ...RECOVERY BUFFER DATA CLOCK RD BUFFER CLOCK TX TERRESTRIAL MASTER BUFFER CLOCK TX TERRESTRIAL CLOCK RECOVERY BUFFER HIGH STABILITY OSCILLATOR INTERNAL OSCILLATOR SD BOP DTS DTS BOP CLOCK RECOVERY TRANS...

Page 172: ...RECOVERY CLOCK RECOVERY BUFFER RD RD BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK RX SATELLITE CLOCK MASTER BOP BOP DTS DTS NOTE TERRESTRIAL EQUIPMENT MUST RECOVER THE CLOCK FROM RECEIVED DATA RECEIVE REC...

Page 173: ...AVE SIDE THE MODEM SETTINGS REMAIN AS MASTER MASTER THE USER EQUIPMENT WILL NEED TO RECOVER THE TIMING FROM THE RECEIVE DATA IF A MASTER SLAVE CLOCK ARRANGEMENT IS DESIRED BOP CLOCK RECOVERY CLOCK REC...

Page 174: ...c is too fast an occasional bit will be lost If incoming traffic is too slow an occasional bit will be repeated Doppler buffer of the signal of the satellite The Doppler shift results from the figure...

Page 175: ...ERROR INTERFACE 1 INCOMING TRAFFIC TOO FAST BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 1 BIT 2 BIT 3 BIT 3 BIT 4 BIT 5 BIT 6 ERROR INTERFACE 2 INCOMING TRAFFIC TOO SLOW f1 f2 f1 IS NOT EXACTLY EQUAL TO...

Page 176: ...ORBIT THUS PROLONGING THE LIFE OF THE SATELLITE A SATELLITE IS MAINTAINED AT AN ASSIGNED GEOSTATIONARY LOCATION THROUGH THE USE OF GROUND COMMAND ADJUSTMENTS TO ITS N S AND E W LOCATION THIS PROCESS...

Page 177: ...creases The orbit of the satellite can result in a peak to peak altitude variation of 2 85 km while the station keeping of a newly launched satellite will typically be 0 1 150 km The total effect will...

Page 178: ...the satellite and will empty using the local clock The object of the buffer is to ensure that the buffer overflows or underflows at regular determinable intervals typically every 40 days The buffer de...

Page 179: ...otal or 2 ms 3 7 1 3 1 Multiples of the Frame Length If this setting is set to NONE the user can choose any buffer depth 3 7 1 4 Total Buffer Length T1 and E1 framing structure under G 704 is availabl...

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Page 181: ...es to other modems within the modem when necessary The modem configuration parameters are maintained in battery backed RAM which provides total recovery after power down situation The M C functions in...

Page 182: ...tal to Analog Converter DAC Read Only Memory ROM Analog to Digital Converter ADC Read Access Memory RAM Universal ASYNC User Interface Fault and Alarm Relays MODEM 11 MHz CLOCK I C BUS 2 RAM AND REAL...

Page 183: ...ry to see if valid data has been retained If valid data has been retained the modem is reconfigured to the parameters maintained by the RAM 2 If the non volatile memory fails the valid data test a def...

Page 184: ...ure each modem for one address between 1 and 255 Each modem on a common remote communications link EIA 485 must have a distinct address Use the front panel control in the Function Select Utility Syste...

Page 185: ...ulated BER Threshold NONE Modem Reference Internal Sweep Center 0 Hz RS Encoder OFF Sweep Range 60000 Hz Reacquisition 0 seconds RS Decoder OFF Configuration Interface TX Clock Source TX Terrestrial S...

Page 186: ...ate B 128 kbps QPSK 1 2 RX Rate B 128 kbps QPSK 1 2 TX Rate C 256 kbps QPSK 1 2 RX Rate C 256 kbps QPSK 1 2 TX Rate D 512 kbps QPSK 1 2 RX Rate D 512 kbps QPSK 1 2 TX Rate V 38 4 kbps QPSK 1 2 RX Rate...

Page 187: ...2 wire Turbo Firmware FW NNNNNNR Operation Mode Duplex Display Contrast 64 Year Display 2 digit EXT AGC MIN PWR 0 0 Volts Self Test OFF EXT AGC MAX PWR 10 0 Volts Utility Modem Type Modem Type Custom...

Page 188: ...3 for a description of each modulation type A block diagram of the modulator is shown in Figure 4 2 INTERFACE MUX OPTIONAL FRAMING UNIT IBS IDR ASYNC AUPC DROP INSERT OPTIONAL REED SOLOMON ENCODER MO...

Page 189: ...o 781 25 kbps 5 16 Rate BPSK 4 8 kbps to 2386 363 kbps 1 2 Rate O QPSK 64 kbps to 5 0 Mbps 3 4 Rate 8PSK Symbol Rate Range 4 8 ks s to 2 5 Ms s Test Modes Carrier Null and Quadrature Dual and Offset F...

Page 190: ...75 optional Output Return Loss 20 dB minimum Scrambler Type V 35 Differential Encoding 2 phase or none FEC Convolution Encoding Viterbi or Sequential Encoding Rate 1 2 3 4 7 8 2 3 Viterbi TCM Rate 1 2...

Page 191: ...nal encoder for encoding the baseband data The code rates 1 2 3 4 7 8 and 2 3 are based on the symbol rate range of 2 4 kbps to 2 5 Mbps For Viterbi codes the convolutional encoder encodes the data at...

Page 192: ...odule The amplifier circuitry provides programmable control of the output level over a range of 5 to 30 dB in 0 1 dB steps The amplifier has power leveling of 0 5 dB to maintain the stability of the o...

Page 193: ...3 4 rate 8 4 kbps to 4 375 Mbps 7 8 rate Using vector analysis of the constellation pattern QPSK represents a symbol with the carrier phase angle at 45 135 225 or 315 The 1 2 3 4 and 7 8 rates encoded...

Page 194: ...rforms FEC on the data stream using Viterbi or Sequential decoding algorithms DIGITAL SIGNAL PROCESSING DIGITAL CLOCK RECOVERY LOOP SWITCH REF VCXO REF PLL OC XO OPT HIGH STABILITY AGC LPF BPF LO 2 LO...

Page 195: ...kbps to 1193 181 kbps 21 44 Rate BPSK 2 4 kbps to 781 25 kbps 5 16 Rate BPSK 4 8 kbps to 2386 363 kbps 1 2 Rate O QPSK 64 kbps to 5 0 Mbps 3 4 Rate 8PSK Symbol Rate Range 4 8 ks s to 2 5 Ms s IF Freq...

Page 196: ...ion of the I and Q channels is optimized for the Costas and Clock loops as well as the soft decision mapping circuitry When the active decoder determines that the modem is locked the M C stops the swe...

Page 197: ...erts the digital I and Q data to 3 bit soft decision values These values are then fed to the programmable vector rotation circuit providing compatibility with spectrum reversal of the I and Q channels...

Page 198: ...ntial or Viterbi Decoder FAST options with Reed Solomon hardware Sequential or Viterbi Decoder FAST options with Turbo Codec hardware FAST options with Overhead hardware Sequential or Viterbi Decoder...

Page 199: ...ta communication standards MIL STD 188 EIA 449 EIA 232 or V 35 The interface receivers and drivers for these standards as well as the handshake signals for MIL STD 188 and V 35 are selectable through...

Page 200: ...A RXTERR RX CLOCK RXCLK PLESIOCHRONOUS BUFFER PROCESSORS OVERHEAD DEMUX RX DATA RXSAT MUX SCT EXT TXCLK HI STAB RX OVERHEAD BACKWARD ALARMS LINE LINE DRIVERS DRIVERS BWA FORM C RELAYS DRIVERS RELAY DR...

Page 201: ...k Reference Normal derived from SD for G 703 interface SCTE TT Internal 10 5 accuracy Optional 2 x 10 7 high stability External Plesiochronous Buffer Included in receive path Buffer Clock Reference TX...

Page 202: ...Table 4 6 for V 35 specifications Table 4 6 V 35 Specifications Parameter Specification Circuit Supported SD SCT SCTE RD SCR DSR RLSD RTS CTS MC Amplitude RD SCR SCT SD SCTE 55V pk 20 differential int...

Page 203: ...RXD RXC ST CTS DM DSR True 10V 5V False 10V 5V Receiver Amplitude TXD TXC RTS LL MC True Minimum 1V False Maximum 1V Impedance 5000 2000 2500 pF Signals Description TXC Send Data RXC Receive Data RTS...

Page 204: ...maximum slide of 0 5 ms The fill status is available as a monitor and is accurate to 1 Overflows or underflows are stored in the stored fault section of the M C status registers along with the date an...

Page 205: ...input to the buffer The front panel interface provides four clock selections clocking the data out of the buffer Internal Clock SCT RX Recovered Clock RXCLK External Clock EXT TX Clock Dejittered TXC...

Page 206: ...n service and fault the modem The outputs of the demodulator fault relay are available as follows Pins DF C and DF NO on the 50 pin D IDR interface connector J8 9 pin D modem fault connector J7 The re...

Page 207: ...the EIA 232 or EIA 485 remote interface connector that is integrating a modem or switch into a computer network Refer to Appendix B for the remote interface specification In addition to the four back...

Page 208: ...3650 Satellite Modem Revision 3 Theory of Operation MN SLM3650 IOM 4 28 This page is intentionally left blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg c...

Page 209: ...ng external equipment A 2047 pattern is generated by the modem and routed through all sections This is accomplished by placing the modem in IF and baseband loopbacks Pseudo Gaussian noise is introduce...

Page 210: ...2 Set up the modem for baseband loopback operation by using the Configuration Interface front panel menu Chapter 3 The modem will run error free Refer to Chapter 3 for a block diagram of the baseband...

Page 211: ...menu will display signal level raw BER corrected BER and Eb N0 Refer to Chapter 1 for examples of BER performance curves 5 Connect a spectrum analyzer to the modem as shown in Figure 5 2 Ensure the I...

Page 212: ...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 8 12 8 12 8 11 0 12 8 10 3 13 5 13 3 1...

Page 213: ...Modem Rate 2144kbit s 3 4 Rate Coding with 7 7 dB Eb No S N N 10 dB Figure 5 2 Typical Output Spectrum with Noise ATTEN 10 dB 5 00 dB DIV CENTER FREQUENCY 140 000 MHz RL 20 29 dBm PASS CENTER 140 000...

Page 214: ...rrier detect LED is on and the DEMUX lock fault has been cleared where applicable the modem will run at the specified error rate Run the TX power level input amplitude over the full range and offset t...

Page 215: ...tellite Modem Revision 3 Maintenance MN SLM3650 IOM 5 7 WITH NOISE WITHOUT NOISE Figure 5 4 Typical Eye Constellations Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www art...

Page 216: ...on required to repair the modem If any of the troubleshooting procedures mentioned earlier in this chapter do not isolate the problem and Comtech EF Data Customer Support assistance is necessary have...

Page 217: ...X X X X X Q CHANNEL X X X X X X AGC X X X X X X MODEM REF ACT X X X MODEM REF PLL X X X X X X MODULE X X X X X X CONFIGURATION X X X DEMODULATOR FAULTS CARRIER DETECT X X X X X IF SYNTHESIZER X X X X...

Page 218: ...X X TX AUDIO 2 CLIP X X CONFIGURATION 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 X X BACKWARD ALARM X X X X BUFFER CLK PLL X X X X BUFFER CL...

Page 219: ...12V POWER SUPPLY X X X 5V SUPPLY X X X SELF TEST X CONTROLLER X X X X X INTERFACE MODULE X X X X X BACKWARD ALARMS IDR OVERHEAD ONLY BW ALARM RX 4 X X X BW ALARM RX 3 X X X BW ALARM RX 2 X X X BW ALAR...

Page 220: ...front panel LED could be one of many faults To determine which fault has occurred use the Fault or Stored Fault front panel menu Refer to Chapter 3 for information on the Fault or Stored Fault front...

Page 221: ...ed to 1640 kbps An IBS type would be programmed for the input data rate to the channel unit The modem accounts for the overhead because of the change in internal reference Use interface loopback for i...

Page 222: ...is faulted This fault is a hardware failure Contact the Comtech EF Data Customer Support Department I CHANNEL Indicates a loss of activity in the I channel of the quadrature demodulator Typically ind...

Page 223: ...tion of all 1s or 0s This is referred to as a data stable condition data is not transitioning This fault indicates there is trouble in the chain sending data to the modem The modem passes this signal...

Page 224: ...enu the RX data AIS is monitoring a fault condition of all 1s or 0s This is referred to as a data stable condition data is not transitioning The fault indicates trouble in receiving data from the sate...

Page 225: ...se is invalid or absent receive data This is a major prompt alarm The alarm will cause insertion of receive AIS all 1s and the switch over will be attempted This fault is to be sent as a backward alar...

Page 226: ...12V power supply fault Indicates a high or low voltage condition Level is 5 Check for a short on the 12V line from the power supply or on any of the plug in boards 12 VOLT SUPPLY 12 VDC power supply f...

Page 227: ...ls 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 alarm is controlled by wiring the backward alarm inputs of the mode...

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Page 229: ...ion A 2 1 Reed Solomon Codec A 3 1 Interface A 4 1 Overhead Interface A 5 1 Turbo Product Codec as FEC A 1 2 Implementation A 2 2 Reed Solomon Encoder A 3 2 Reed Solomon Features A 4 2 Installation A...

Page 230: ...Rate Low Variable Data Rate up to 512 kbps High Variable Data Rate up to 4 375 Mbps Sequential Decoder Viterbi Decoder Asymmetrical Loop Timing 8PSK Reed Solomon Codec Turbo Codec ASYNC AUPC Overhead...

Page 231: ...into the unit through the front panel keyboard or the rear remote port With the exclusive FAST technology operators have maximum flexibility for enabling functions as they are required FAST allows an...

Page 232: ...manufacturer for the desired hardware upgrade If the unit displays an X the unit can be upgraded in the field If the unit displays a the feature is installed If the unit displays a the feature is FAS...

Page 233: ...lt settings with the new option available 11 If a wrong or invalid code is entered the unit will display Wrong Code Entered and no changes will occur Retry the code verify that the code is correct or...

Page 234: ...splay will exhibit WRONG CODE ENTERED Repeat procedures Contact Comtech EF Data Customer Support personnel for further instructions if the error message remains A 1 2 6 Variable Data Rates The basic p...

Page 235: ...ly through the EIA 232 interface Selection of the transmit and receive data rates may be made in 64 kbps increments and may be independent of each other The actual satellite rates are 16 15 of the tra...

Page 236: ...rary order Insert Time Slot Selection Time Slot 0 not Allowed 1 to 24 T1 1 to 31 E1 Arbitrary order Interface Type Transformer coupled symmetrical pair Terrestrial Input Data Rate T1 1544 kbps 100 bit...

Page 237: ...eering Service Channel ESC Data Interface Type EIA 232 ESC Data Rate Maximum Asynchronous 1 2000 of satellite data rate maximum over sampled ESC Data Circuits Supported SD RD DSR Faults and Alarms Bac...

Page 238: ...E TIMING LOGIC MUX DEMUX INTERFACE INTERFACE INTERFACE INTERFACE INTERFACE SYNTHESIS SYNTHESIS ALARM MONITOR ES TO ES ASYNC RS 232 RS 485 T1 E1 T1 E1 T1 E1 T1 E1 CLOCK CLOCK TX DEJITTER LOGIC ALARMS B...

Page 239: ...3650 Satellite Modem Revision 3 Options MN SLM3650 IOM A 11 Figure A 2 D I with Asynchronous Overhead Data Flow Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg...

Page 240: ...substitution codes Alternate Mark Inversion AMI B8ZS and HDB3 are user selectable during configuration A data loopback function on the insert data is available in this section This enables the user to...

Page 241: ...erface and sending the signal into the receive fault tree in accordance with IESS 308 Under certain fault conditions defined by IESS 308 the receive user data will be replaced by a pattern with all 1s...

Page 242: ...f the modem The synchronous channel requires use of the TX clock provided by the modem for operation A 1 3 2 6 Backward Alarm A backward alarm signal is included in the D I overhead The signal is sent...

Page 243: ...T1 T1 D4 Framing T1_ESF_S T1 Extended Super Frame Special T1_S T1 D4 Framing Special T1_IBS T1 IBS Non Fractional Full 1 544M E1_CCS E1 Common Channel Signaling E1_CAS E1 Channel Associated Signaling...

Page 244: ...SLM 3650 Satellite Modem Revision 3 Options MN SLM3650 IOM A 16 Figure A 3 E1 Framing Formats Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 245: ...SLM 3650 Satellite Modem Revision 3 Options MN SLM3650 IOM A 17 Figure A 4 T1 Framing Formats Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 246: ...ds Mod Spectrum Normal BER Threshold NONE Demod Spectrum Normal Interface TX Clock Source TX Terrestrial Buffer Size 1 mS Buffer Clock Source Insert Frame Structure T1 Data G 704 TX Clock Phase Auto F...

Page 247: ...input and output These interfaces can also be selected from the front panel Fixed 1 15 overhead is added to the data when an ASYNC channel is being used With the ASYNC channel enabled the terrestrial...

Page 248: ...ASYNC AUPC Block Diagram G 703 V 35 TERR DATA TERR CLOCK INPUT FIFO PLL INTERFACE CNT SIGNALS AUPC DATA FROM M C TERR DATA TERR OVERHEAD CLOCK INTERFACE CNT SIGNALS ASYNC DATA ASYNC DATA UART M C CON...

Page 249: ...mum or Hold REMOTE CL ACTION Defines action that local modem will take if remote modem reports carrier loss Maximum Minimum or Hold LINK MODEM A MODEM B With AUPC enabled on both modems A and B if mod...

Page 250: ...many sites For full duplex operation use a separate demodulator This option is located in the Function Select Utility Modem Type Local Modem AUPC menu Proceed as follows 1 Locate and enable the optio...

Page 251: ...interfaces are provided for the terrestrial data source EIA 422 and V 35 The operator must select the terrestrial interface type from the front panel under the Function Select Utility Interface menu...

Page 252: ...4 3 4 DEMUX Operation The DEMUX section functions in a reverse manner to the MUX side Data including overhead is received from the Demod card in the modem at the overhead rate The DEMUX locates the f...

Page 253: ...e Send Timing ST pin to output the RX clock The RX clock is sent out the ST pin to the appropriate interface drivers and on to the user The operator is left with the option of clocking terrestrial dat...

Page 254: ...front panel In the 2 wire mode the EIA 485 receivers are disabled whenever the data is to be transmitted down the 2 wire interface In the 4 wire mode the receiver is always on The receive modem contr...

Page 255: ...table lists examples If DR 8 000K Baud rate can be 150 or lower If DR 16 000K Baud rate can be 300 or lower If DR 32 000K Baud rate can be 600 or lower If DR 64 000K Baud rate can be 1200 or lower If...

Page 256: ...A 232 Table A 5 2 EIA 232 EIA 485 4 wire Table A 6 3 EIA 232 EIA 485 2 wire Table A 7 4 EIA 485 4 wire EIA 232 Table A 8 5 EIA 485 4 wire EIA 485 4 wire Table A 9 6 EIA 485 4 wire EIA 485 2 wire Table...

Page 257: ...inout information found in the applicable configuration section Refer to Figure A 5 and Figure A 6 4 Set the remote modem front panel controls according to the information found in the applicable conf...

Page 258: ...TX 30 dBm J8 25 PIN ASYNC CONNECTOR EIA 485 25 PIN CONNECTOR TO 9 PIN CONNECTOR INDUSTRY STANDARD LOCAL END REMOTE END BENCH TEST BREAKOUT PANEL 50 PIN 25 PIN ASYNC CONNECTOR BREAKOUT PANEL 50 PIN Fi...

Page 259: ...TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 pin female ASYNC connector on either the breakou...

Page 260: ...X Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 pin female ASYNC connector on either the breakout...

Page 261: ...n ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 pin female ASYNC connector on either the...

Page 262: ...top 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 pin female ASYNC connector on either the breakout pa...

Page 263: ...op 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 pin female ASYNC connector on either the breakout pan...

Page 264: ...YNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 pin female ASYNC connector on either the bre...

Page 265: ...38400 See A 1 4 3 10 ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits 7 Remote End Modem Settings for EIA 232 Utility Interface Menu ASYNC TX and RX Type EIA 232 Configur...

Page 266: ...nout for the WYSE terminal cable using an EIA 232 to EIA 485 converter 7 Local End WYSE Cable With Converter 25 Pin Male Connector 9 Pin Male Connector TX RX 2 5 5 TX RX TX RX 14 17 4 TX RX See Note 1...

Page 267: ...38400 See A 1 4 3 10 ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits 8 Remote End Modem Settings for EIA 485 4 Wire Utility Interface Menu ASYNC TX and RX Type EIA 485 4...

Page 268: ...SE terminal cable using an EIA 232 to EIA 485 converter 8 Local End WYSE Cable With Converter 25 Pin Male Connector 9 Pin Male Connector TX RX 2 5 5 TX RX TX RX 14 17 4 TX RX See Note 18 21 Note Disab...

Page 269: ...Type EFD Closed Decoder Type Viterbi Demod Spectrum Normal Interface TX Clock Source TX Terrestrial Frame Structure E1 Data G 704 Buffer Clock Source RX Satellite Frame Structure T2 Data G 743 TX Cloc...

Page 270: ...er MICRO COMPUTER BUS MICROCOMPUTER INTERFACE SYNDROME SHIFT REGISTERA DESCRAMBLER V 35 RECEIVE DAT A DECODER DETECTOR DIFFERENTIAL CHANNEL BER OUTPUT BUFFER PARITY GENERATOR SYNDROME SHIFT REGISTERB...

Page 271: ...e cumulative metric will decrease rapidly as the error propagates through the taps of the parity generator In this case the decoder tries to back up through the data to the last node where the metric...

Page 272: ...errors than the input differences in the two can be counted to yield the raw BER The raw BER is sent to the M C for further processing A 1 5 2 Viterbi Decoder The Viterbi decoder operates in conjunct...

Page 273: ...to determine which symbols have been corrupted by the transmission channel and correct as many errors as possible The code symbols produced by the encoder provide the data for this task The seven fun...

Page 274: ...means of determining synchronization of the decoder The output data is then descrambled and differentially decoded Both of these processes are optional and may be selected by the user locally or remo...

Page 275: ...ADPCM audio channels are encoded according to CCITT G 721 The backward alarms are level translated to TTL by threshold comparators set to 2 5V A 1K pull up resistor to 5V is connected to each alarm in...

Page 276: ...rward in a simple single destination link INTELSAT specifies that any major failure of the downlink chain is to generate a backward alarm The modem has a demodulator fault relay which de energizes in...

Page 277: ...SLM 3650 Satellite Modem Revision 3 Options MN SLM3650 IOM A 49 Figure A 10 IDR Interface Block Diagram Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 278: ...ESC Data Interface Type EIA 422 ESC Data Rate 8 kbps ESC Data Circuits Supported SD ST RD RT Octet in Octet out Data Signal Phasing Per EIA 449 data changes on the rising clock transition is sampled...

Page 279: ...n Net RF Loopback OFF Encoder Type Viterbi Sweep Center Freq 0 Hz CW Mode Normal OFF Sweep Range 60000 Hz Mod Power Fixed 0 dB Sweep Reacquisition 0 seconds Mod Spectrum Normal BER Threshold NONE Demo...

Page 280: ...h the same interface loopback device The receive data is demultiplexed and synchronously descrambled by the demultiplexer The backward alarm is reported to the M C and output by Form C relay contact T...

Page 281: ...SLM 3650 Satellite Modem Revision 3 Options MN SLM3650 IOM A 53 Figure A 11 IBS Interface Block Diagram Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 282: ...ate is 1 512 of primary data if an EIA 232 clock is provided Octet Clock Pulse Data rate 8 Octet high with every 8th bit EIA 232 Specification Circuit Supported RD TD DSR RTS CTS Amplitude RD RTS True...

Page 283: ...F Encoder Type Viterbi Sweep Center Freq 0 Hz CW Mode Normal OFF Sweep Range 60000 Hz Mod Power Fixed 0 dB Sweep Reacquisition 0 seconds Mod Spectrum Normal BER Threshold NONE Demod Spectrum Normal In...

Page 284: ...clock loop reference must be one of the following Transmit terrestrial clock External clock input Receive clock input Notes 1 The clock inputs are as follows a 64 kHz shall be divisible by 8 kHz b 32...

Page 285: ...ote 2 ST SCT LOOP DDS EXT REF See Note 2 ST INT LOOP See Note 1 RXC PLL ST EXT CLOCK MC PLL ST Notes 1 When CONFIGURATION INTERFACE LOOP TIMING is set to ON SCT INT will change to read SCT LOOP 2 When...

Page 286: ...p 1 Master site has a 10 MHz clock that is needed as the clock source 2 Unequal data rates 4 096 Mbps and 2 152 Mbps numbers divisible by 8 Master Site Option No 1 1 Set Configuration Modulator Modem...

Page 287: ...uration Interface Buffer Clock to RX Satellite Buffer Bypass A 1 9 G 703 Note If required refer to Section A 3 for installation of the interface PCB G 703 data is either in AMI B8ZS 8 zero suppression...

Page 288: ...3V 0 3 1 5V pk into 100 E1 3V 0 3 1 5V pk into 120 Pulse Mask T1 G 703 2 E1 G 703 6 Jitter Attenuation T1 G 824 E1 G 823 Line Code AMI B8ZS B6ZS HDB3 A 1 10 Variable Data Rates The basic platform mod...

Page 289: ...he modem must have the Reed Solomon PCB installed to access this feature The Reed Solomon Codec PCB is a 4 75 x 6 00 12 07 x 15 24 cm daughter card that is located on the main PCB Figure A 14 TX REED...

Page 290: ...CDR CLK DECDATA OVERHEAD PROCESSOR RX DATA LOOPBACK MUX DMXDATA DMX CLK RX CLK DEC CLK REED SOLOMON MAIN MAIN PCB Figure A 15 Reed Solomon Codec Block Diagram A 2 1 1 Specifications Refer to Table A 2...

Page 291: ...n Figure A 16 The Reed Solomon encoder section includes the following circuits Synchronous Scrambler Reed Solomon Codec encoder section Serial Parallel Converter RAM Interleaver Parallel Serial Conver...

Page 292: ...block of data out of the Codec The letter k represents the number of data bytes in a given block The term n k 2t is the total number of check bytes appended to the end of the data This is referred to...

Page 293: ...RSWORD 1 RS PAGE RS SYNCH PERIOD UNIQUE WORD BYTES GO INTO THESE BYTES 2 t CHECK BYTES TERRESTRIAL DATA RATE RS CODE n k t 1544 1640 2048 2144 225 205 10 219 201 9 Figure A 17 Reed Solomon Code Page F...

Page 294: ...Figure A 18 Reed Solomon Decoder Section Block Diagram The data and clock signals come from the demultiplexer on the interface PCB and are sent to the Reed Solomon decoder section The data is sent thr...

Page 295: ...real data a synchronous FIFO is used to buffer the data and strip the check bytes out of the blocks of data The data then passes through a parallel converter to be serialized The data is sent through...

Page 296: ...CB Refer Figure A 19 for installation location of the Reed Solomon daughter card CAUTION Turn the power off before installation High current VDC is present Failure to do so could result in damage to m...

Page 297: ...evision 3 Options MN SLM3650 IOM A 69 Reed Solomon Cards TX or RX or Duplex in either slot Figure A 19 Reed Solomon Codec Installation Artisan Technology Group Quality Instrumentation Guaranteed 888 8...

Page 298: ...e below for a block diagram of the Reed Solomon Duplex card SOLOMON AUPC TMUXDAT TMUX_EN ASYNC ENABLE REED SOLOMON RS BYPASS TXCLK PLL Divide by 2 RS BYPASS ASYNC ENABLE Correlator Edge Detect Reed So...

Page 299: ...coder 1 AHA 4011 decoder 2 71256 RAM s 1 74FCT2574 Latch The Reed Solomon Interface on the Spartan 2 features Reed Solomon Encoder Reed Solomon Decoder Variable Interleaver depth Synchronous descrambl...

Page 300: ...256 126 112 7 384 126 112 7 512 126 112 7 768 126 112 7 1024 126 112 7 1536 126 112 7 IDR with 96 kbit s Overhead 1544 225 205 10 2048 219 201 9 No Overhead ASYNC 64 to 2048 kbps 225 205 10 IDR with 9...

Page 301: ...a method of monitoring the insertion rate is necessary to keep from disturbing the MOD encoder operation The MOD can handle only one insertion per symbol clk 4 An up down counter is used to keep trac...

Page 302: ...olomon code word blocks of the last page of the interleave frame When a depth of 8 is programmed the interleaver consists of two pages with each page consisting of 8 Reed Solomon code word blocks Agai...

Page 303: ...d causes the counter to count down The counter must count down to zero before again entering hunt mode offering some compliance for noise in the system After a locked condition is reached the correlat...

Page 304: ...ability of the RS decoder If the block is uncorrectable the data is passed through the decoder as received meaning no correction was performed on that block of data The decode Xilinx monitors the CRTN...

Page 305: ...r The de interleaver operates in much the same manner as the interleaver except it writes scrambled and RS encoded data with check bytes into a static ram in column format and reads in row format The...

Page 306: ...tional performance 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 REED SOLOMON 1 2 RATE 7 8 RATE Figure A 25 Performance with Noise Viterbi D...

Page 307: ...SK 1 2 Sequential 2 4 kbps 1 25 Mbps QSPK 1 2 Sequential 4 8 kbps 2 5 Mbps QPSK 3 4 Sequential 7 2 kbps 3 75 Mbps QPSK 7 8 Sequential 8 4 kbps 4 375 Mbps BPSK 1 2 Viterbi Reed Solomon 2 4 kbps 1 138 M...

Page 308: ...certain options and functionality of the modem Observe the following If the overhead interface PCB is installed at the factory then the 50 pin interface relay card will be pre installed If the overhea...

Page 309: ...present Failure to do so could result in damage to the modem components 1 Turn off the modem and unplug the power supply 2 Remove the rear panel retaining screws Using the finger pulls slide the main...

Page 310: ...two field changeable firmware chips If necessary these chips can be removed and new chips added to allow for additional options enhancements or repairs Currently there are no foreseeable requirements...

Page 311: ...ellite Modem Revision 3 Options MN SLM3650 IOM A 83 FIELD CHANGEABLE CHIPS Figure A 27 Main Board Field Changeable Chips Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www a...

Page 312: ...ps can be removed and new chips added to allow for additional options enhancements or repairs Currently there are no foreseeable requirements for this task See Figure A 28 for the locations of the fie...

Page 313: ...Mux PCB can be installed in the factory or in the field This MUX PCB is used in conjunction with a compatible I O card to provide a 100 pin subminiature D style connector located on the rear panel of...

Page 314: ...r inserting PCBs 1 Turn power off and unplug the power supply 2 Remove the rear panel retaining screws Using the finger pulls slide the main modem assembly out from the rear of the modem chassis 3 Ins...

Page 315: ...y cycle 10 clock send timing is phase locked to the aggregate clock supplied by the modem Clock stability is based on the reference source The clock accuracy will nominally be 10E 5 when using the mod...

Page 316: ...IA 422 TX DATA TRIB8 76 TD422A_3 EIA 422 TX DATA TRIB3 27 TC422B_8 EIA 422 TX CLKB TRIB8 77 TC422B_3 EIA 422 TX CLKB TRIB3 28 TC422A_8 EIA 422 TX CLKA TRIB8 78 TC422A_3 EIA 422 TX CLKA TRIB3 29 CTS422...

Page 317: ...to plug into the base board of the modem at two internal interfaces and provide a single 50 pin D sub connector at the rear of the modem to replace the non overhead 25 pin connector The particular ove...

Page 318: ...PC Channel AUPC is included to provide remote output power adjustment capability User Channel 3 Auxiliary Data Channel EIA 422 SYNC 0 6 to 4000 kbps EIA 232 ASYNC 0 6 to 64 kbps with CTS flow control...

Page 319: ...Table A 28 Demultiplexer Specific Specifications Demultiplexer Specific Specifications Tributary Data Interface Synchronous mode The demultiplexer supports synchronous data for each tributary The trib...

Page 320: ...or inserting PCBs 1 Turn power off and unplug the power supply 2 Remove the rear panel retaining screws Using the finger pulls slide the main modem assembly out from the rear of the modem chassis 3 I...

Page 321: ...iliary 2 38 DDO B Channel 1 Drop Data Output G 703 Main 5 TXD A Channel 4 ESC Send Data 39 IDI A Channel 1 Insert Data Input G 703 Main 4 TXD B Channel 4 ESC Send Data 40 IDI B Channel 1 Insert Data I...

Page 322: ...e significantly reduced Furthermore the traditional concatenated RS schemes exhibit a very pronounced threshold effect a small reduction in Eb No can result in total loss of Demod and decoder synchron...

Page 323: ...erleaving while the TPC cases yield delays which are less than or equal to Sequential decoding A 5 3 Comparison of all TPC Modes Mode Eb No at BER 10 6 Eb No at BER 10 8 Spectral Efficiency Symbol Rat...

Page 324: ...for comparison purposes Observe that the 8 PSK Rate 3 4 Turbo performance closely approaches that of the Rate 2 3 TCM Reed Solomon case the BER performance is within approximately 0 4 dB However it s...

Page 325: ...d using serial differential encoding decoding However when No FEC is being used an entirely different scheme must be used Therefore in QPSK a parallel differential encoding decoding technique is used...

Page 326: ...s rate or 32 ksymbols second One quarter of this equals 8 kHz Therefore the absolute maximum acquisition sweep range which should be considered is 8 kHz If there is any frequency uncertainty on the in...

Page 327: ...2 1E 1 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB Specification limit Rate 1 2 Coding Uncoded BPSK QPSK Typical Performance Specification limit Rate 3 4 Coding 1 2 3 4 5 6 7 8 9 10 11 12 Specification lim...

Page 328: ...1E 4 1E 3 1E 2 1E 1 1 2 3 4 5 6 7 8 9 10 11 Eb No in Specificatio limit Rate 1 2 Coding Uncoded Typical Performance Specificatio limit Rate 3 4 Coding 1 2 3 4 5 6 7 8 9 10 Specificatio limit Rate 7 8...

Page 329: ...2 1E 1 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB Specification limit Rate 1 2 Coding Uncoded BPSK QPSK Typical Performance Specification limit Rate 3 4 Coding 1 2 3 4 5 6 7 8 9 10 11 12 Specification lim...

Page 330: ...4 1E 3 1E 2 1E 1 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB Typical performance Rate 1 2 Coding Uncoded BPSK QPSK Typical performance Rate 3 4 Coding 1 2 3 4 5 6 7 8 9 10 11 12 Typical performance Rate 7...

Page 331: ...0 200 Outer Code Uncoded BPSK QPSK 1 2 3 4 5 6 7 8 9 10 11 12 BER Viterbi with concatenated RS 220 200 Outer Code Combined sync threshold demod and Viterbi Decoder Rate 1 2 Sync threshold Rate 3 4 Spe...

Page 332: ...Outer Code Uncoded BPSK QPSK 1 2 3 4 5 6 7 8 9 10 11 12 BER Sequential with concatenated RS 220 200 Outer Code 512 kbps Combined sync threshold demod and Sequential Decoder Rate 1 2 Sync threshold Rat...

Page 333: ...4 1E 3 1E 2 1E 1 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB Specification limit Rate 2 3 Coding and RS Outer Code Uncoded BPSK QPSK Typical Performance Specification limit Rate 2 3 Coding 1 2 3 4 5 6 7 8...

Page 334: ...7 1E 6 1E 5 1E 4 1E 3 1E 2 1E 1 1 2 3 4 5 6 7 8 9 10 11 12 Eb No in dB Uncoded BPSK QPSK CEFD Turbo Product Codec Rate 3 4 QPSK OQPSK 8PSK 1 2 3 4 5 6 7 8 9 10 11 12 BER Spec limit Rate 3 4 8 PSK Spe...

Page 335: ...ormation Interchange ASYNC Asynchronous AUPC Automatic Uplink Power Control BB Baseband bps bits per second BPSK Binary Phase Shift Keying C Celsius CLK Clock COM Common CS Clear to Send CTS Clear to...

Page 336: ...Maximum Mbps Megabits per second MC Monitor and Control MFS Multiframe Sync MHz Megahertz 106 Hertz Mod Modulator MOP Modulated Output Power MSB Most Significant Bit MUX Multiplexer n nano 10 9 N A No...

Page 337: ...or Logic TX Transmit Transmitter TXCLK Transmit Clock TXD Transmit Data UB Universal Brreakout box US United States V Volts VAC Volts Alternating Current VCO Voltage Controlled Oscillator VDC Volts Di...

Page 338: ...SLM 3650 Satellite Modem Revision 3 Glossary MN SLM3650 IOM g 4 This page is intentionally left blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 339: ...n to S N and Eb No Chart 5 4 Comparison of all TPC Modes A 95 Converting Between Bits and Seconds 3 99 D D I G 703 Master Master 3 96 D I Modem Fault A 18 D I Operations 3 82 D I Specification A 8 Dat...

Page 340: ...Solomon Board and Firmware 2 30 Installation 2 2 INTELSAT Viterbi with Reed Solomon Codec BER 1 18 Interface 4 19 Interface Checkout 5 2 Interface Specification 4 21 L LED Indicators 3 2 Local EIA 23...

Page 341: ...1 System Faults Alarms 5 8 T Theory of Modulation Types 4 12 Theory of Operation 4 1 4 2 4 11 4 16 Trellis 8 PSK BER 1 26 Typical Spectral Occupancy 1 31 Turbo Products Coding Processing Delay Compar...

Page 342: ...SLM 3650 Satellite Modem Revision 3 Index MN SLM3650 IOM i 4 This page is intentionally left blank Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 343: ...r 0 621 Temperature Conversions Units of Weight Unit Gram Ounce Avoirdupois Ounce Troy Pound Avoir Pound Troy Kilogram 1 gram 0 03527 0 03215 0 002205 0 002679 0 001 1 oz avoir 28 35 0 9115 0 0625 0 0...

Page 344: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 345: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

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