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CDM-600L Satellite Modem
Front Panel Operation
The top line displays the log entry number and event log.The bottom line of the display
indicates the time and date of the entry shown in DAY-MONTH-YEAR format. The
display shows the statistics data that has been measured and recorded. The statistics logs
can store up to 199 log entries. (To enable statistic logging, see Section 6.3.1.12.)
The meaning and format of the numbers is as follows:
•
•
•
IMPORTANT
•
•
Examples:
Use the [←] or [→ ] arrow keys to select the CLEAR ALL option. Select Yes or No using
the [↑ ] or [↓] arrow keys and press ENTER to implement, or CLEAR.
The user defines a measurement interval (see CONFIG, STATS) and during this
interval, Eb/No and Transmit Power Level Increase (TPLI) are observed, at a
1 second rate.
At the end of this period, the average Eb/No is calculated and recorded, and the
minimum value seen in the interval.
Similarly, the average TPLI is calculated, along with the highest value seen in the
interval.
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 ≥ 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'.
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.)
6–36
Revision 2
MN/CDM600L.IOM
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