Comtech EF Data CDM-710 Installation And Operation Manual page 314

CDM-710/L Broadcast Satellite Modem
Appendix C
Supported Signals
ST, TT (or external), SD, TA, CA, RT, RD, SG.
Signal Sense
Programmable Normal or Inverted for TT and TD, RT and RD.
Signal Characteristics
• The 'A' terminal is positive with respect to the 'B' Terminal for a binary 1
(Mark or ON) state.
• The 'A' terminal is negative with respect to the 'B' terminal for a binary 0
(Space or OFF) state.
Data Rate Range
1 to 70 Mbps.
HSSI data rate limit of 70 Mbps may be reached before symbol rate
limit is reached.
Electrical
• Per EIA-612 (10kH ECL-compatible).
• Typical Differential Output Voltage: > 590 mV pp into 110V load.
• Typical Differential Input Voltage: 150 to 1000 mV pp with 110V load.
Minimum Buffer Size
5.0 ms.
Maximum Buffer Size
32 ms (in 0.1 ms steps).
Impedance
• Tx: ST, CA, RT, RD will drive 110V and meet HSSI voltage levels.
• Rx: 110V for TT, SD, TA.
C–6
MN/CDM710.IOM
Revision 12