System specifications of C & M system


  1. Non-coherent FSK techniques are used for data transmission over OPTICAL FIBER links.
  2. Data Baud Rate is 250 Kbits/sec.
  3. Bit interleaved techniques are used for multiplexing Telemetry,Voice,Sync.,Dial and Aux.Channels.
  4. Polynomial and checksum ERROR DETECTION with ARQ capability.
  5. The Bit Error Probability is 10 ¯10 .

Bit rates available for various services

  1. DATA (COMH - ANTCOM COMM)           ------------->  125 Kbits/sec
  2. VOICE (TELEPHONY VOICE)                     ------------->   62.5 Kbits/sec
  3. DIAL (TELEPHONY SIGNALLING)           ------------->   15.625 Kbits/sec
  4. SYNC (SYNCHRONISATION PATTERN)  ------------->   15.625 Kbits/sec
  5. AUX1 (AUXILIARY CHANNEL1)                ------------->   15.625 Kbits/sec
  6. AUX2 (AUXILIARY CHANNEL2)                ------------->   15.625 Kbits/sec
                                                                                                   --------------------
                                                              TOTAL BIT RATE    250 Kbits/sec
                                                                                                   --------------------

Next we'll go into the details of the C & M system

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