Monitor: Statistics - Comtech EF Data CDM-625 Installation And Operation Manual

CDM-625 Advanced Satellite Modem
Front Panel Operation
5.6.3

Monitor: Statistics

Statistics:
09/12/99 14:48:06
The user may scroll backwards or forwards through the entries in the statistics log using the
arrow keys. Pressing ENTER or CLEAR takes the user back to the previous menu. The top line
displays the log entry number and Statistics 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 log can store up to 199 log entries. (To
enable statistics logging, see Section 5.3.1.12.)
The meaning and format of the numbers is as follows:
•
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.
IMPORTANT
• 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'.
Example:
Example:
◄ ►
Use the arrow keys to select the Clear-All option. Select Yes or No using the
keys and press ENTER to implement, or CLEAR.
Sta114:
Clear-All: No
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'.)
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.)
5–51
MN-0000036 (Ref MN/CDM625.IOM)
16.0,16.0,9.0,9.0
(N/Y)
Revision 1
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