User Interfaces
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
4-10
TM075 – Rev. 1.3
Level:
Estimated receive signal (in dBm) as seen by the
Demodulator.
AGC Voltage:
(Optional Configuration)
Displays the voltage level of AGC present at Pin 5 of
the Alarm Connector (J6).
Eb/No:
Estimated Eb/No as seen by the Demodulator.
SER:
Estimated channel error rate (before decoding)
measured by the modem.
CBER:
{0.00 x 10
-12
}
Estimated corrected bit error rate (after decoding).
Error Count:
Displays the current error count from the Viterbi
Decoder.
Offset Freq:
The received carrier frequency offset as measured by
the modem.
Event Buff:
A history of events recorded in the event buffer. A
maximum of 40 events may be stored in the buffer.
Upon receipt of the 41
st
event, the first received event is
automatically deleted, maintaining the last 40 events.
Press Clr to Erase Events:
Clears the contents of the Event Buffer.
Voltages (menu):
+5 Volt:
Displays the me5 VDC power bus inside the
modem.
+12 Volt:
Displays the me12 VDC power bus inside the
modem.
-12 Volt:
Displays the measured -12 VDC power bus inside the
modem.
Buffer Stat:
{0 – 100%}
Displays the buffer % full status.
Press Clr to Center Buffer:
Centers the buffer.
BER Exponent:
{3 – 9}
Sets the time base for the channel error rate
measurement, used to estimate Eb/No.
4.2.6 Alarms Menu Options and Parameters
Modem Alarms (menu):
Active Alrms (menu):
Major Tx (menu):
Status
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