To Disable The Esc Backward Alarms - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
state, the receive end of the link will receive that backward alarm that is initiated at the transmit
end of the link.
The user can connect whichever systems on the earth stations that they desire to these Backward
Alarms Relays as long as they will supply ground to the Backward Alarm Relay Input in the "no
fault" condition and the ground will be removed in the "faulted" condition.
For example: the user could connect the Demod Summary Fault of the modem to the Backward
Alarm 1 Input, so that if the demod went into Major Alarm (such as a Carrier Loss), Backward
Alarm 1 would be transmitted to the receive end of the link. At the receive end, it would show up
as Rx Backward 1 (Receive Backward Alarm 1).

3.13.1 To Disable the ESC Backward Alarms

If the ESC ALARMS Port will not be used and the Backward Alarm Indications are to be
disabled, you must connect pins 10, 11, 22 and 23 to pin 1 (gnd) on ESC Alarms port.
MN-DMD50– Revision 3
Theory of Operation
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