B.4.4 Monitor And Control (M&C) Specifications - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710/L Broadcast Satellite Modem
Appendix B
Jitter Tolerance
Meets ITU-T G.823 (3/93) and ITU-T G.824 (3/93).
Jitter transfer
• ≤ 0.5 dB peaking up to cutoff frequency.
• -20 dB per decade beyond cutoff.
Cable Length (Typical)
• 30 meters (100 feet), RG59.
• 40 meters (140 feet), Belden 8281.
Tx Input Selection
Two inputs, with selection to control which is active.
Loss of Tx Input Data
• Null packets are formed and transmitted.
• Loss of Tx Input, can be masked as Fault or Alarm.
B.4.4 Monitor and Control (M&C) Specifications
Controlled Functions
• Interface I/O Loopback, Digital Loopback.
• Data Rate.
• Loss of Data, can be masked as Fault or Alarm.
• Variable ASI Mode.
Monitored Functions
• Loss of Tx Data – The modulator indicates a loss of sync (framed modes)
and transmits Null Packets in the data portion of the frame.
• Tx Clock PLL Program Error.
• Data Violations (Tx).
• FIFO Faults.
B–10
MN/CDM710.IOM
Revision 12