Comtech EF Data CDM-550T Manual page 67

CDM-550T Satellite Modem
(MONIT, STATS) CONFIGURE
Rev. 1.3
Notes: If the demod has lost lock during the measurement interval, the minimum
Eb/No will show 'LOSS' rather than indicate a value. However, the average
value (while the demod was locked) will still be calculated and shown. If, on the
other hand, the demodulator has been unlocked for the entire measurement
interval, the average Eb/No will also show 'LOSS'. (The display will show
'LOSS,LOSS'.)
If the measured values are greater than, or equal to 16.0 dB, the display will show
16.0 dB.
If AUPC is not enabled, the values of maximum and average TPLI will both
show '0.0'.
Examples:
08.0,13.5,2.5,1.8 means:
Minimum Eb/No observed in the measurement interval = 8.0 dB
Average Eb/No observed in the measurement interval = 13.5 dB
Maximum TPLI observed in the measurement interval = 2.5 dB
Average TPLI observed in the measurement interval = 1.8 dB
LOSS,04.5,0.0,0.0 means:
There was a loss of demod lock during the measurement interval
Average Eb/No observed in the measurement interval = 4.5 dB
Maximum TPLI observed in the measurement interval = 0 dB
Average TPLI observed in the measurement interval = 0 dB
(Which indicates no AUPC activity, or that AUPC is disabled.)
If the user selects CLEAR, the statistics log is cleared, and the user is taken
directly back to the previous menu.
If the users selects CONFIGURE, the following sub-menu is displayed:
LOGGING INTERVAL:90 MINS
(SET 00 TO DISABLE)(ENT)
The user is prompted to enter the logging interval (the period of time over which
the statistics will be measured), using the UP/DOWN arrow keys, then press
ENTER. Setting this to a value of 00 disables the feature (no logging).
The user can choose 10, 20, 30, 40, 50, 60, 70, 80, or 90 minutes.
If AUPC is selected, and the modem is not in Framed mode, the following sub-
menu is displayed:
Front Panel Operation
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