Comtech EF Data SLM-5650A Installation And Operation Manual page 117

SLM-5650A Satellite Modem
Front Panel Operation
The examples that follow depict alarm status screens displayed for the Mod 1
character positions. If the Mod 1
Mod:
Intf: ----
st
If the Intf Tx 1
Mod:
Intf: +---
Monitor: Alarms
Demod: ---------
Intf: ----------
Press [ENT] to access the available read-only Demodulator and Intf (Interface) Rx alarm screens.
Then, use the  arrow keys to navigate through the displayed Demodulator and Interface
character positions (Demod#1 through #6, and Rx Intf#1 through #10). The status message to the
right changes based on the current cursor position, as per the following table:
Receive (Rx) Alarm Position
Top row
Bottom row
The examples that follow depict the alarm status screens displayed for the Demod 1
st
1 character positions. If the Demod 1
Demod: +---
Intf: ---------
st
If the Intf 1 character position is selected:
st
character position is selected:
+---
character position is selected:
----
Receive

Description
Demod #1
Demodulator carrier Phase Lock Loop status.
Demod #2
Demodulator FEC (forward error correction) lock status.
Demod #3
Demodulator RF Synthesizer Phase Lock Loop status.
Demod #4
Demodulator IQ activity status.
Demod #5
Composite Power exceeds 40 dBc.
Demod #6
Composite Power exceeds 20 dBm.
Rx Intf #1 Demultiplexer lock status.
Rx Intf #2 Doppler buffer status.
Rx Intf #3 Doppler buffer fill status.
Rx Intf #4 Doppler buffer overflow status.
Rx Intf #5 Doppler buffer underflow status.
Rx Intf #6 Doppler buffer Phase Lock Loop status.
Rx Intf #7 Doppler buffer reference clock activity status.
Rx Intf #8 Receive data interface AIS (alarm indication signal) status.
Rx Intf #9 Receive Eb/No lower than Eb/No threshold status.
Rx Intf #10 Internal BERT sync status.
st
Mod symbol clk
not locked.
TXIntf data
not locked.
Press <ENT> for
detailed status
character position is selected:
Demod IF not
5–35
MN-SLM5650A
st
and Intf Tx 1
st
and Intf Rx
locked.
Revision 8
st