Monitor: Statistics - Comtech EF Data CDM-600 Operating Instructions Manual

CDM-600 Satellite Modem
Front Panel Operation
6.3.4.2

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 will take the user back to the
previous menu. 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 log can store up to 199 log entries. (To enable statistics logging, see Section
6.3.1.12.)
The meaning and format of the numbers is as follows:
•
•
•
IMPORTANT
•
•
Example:
Example:
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.
STA114:
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.)
16.0,16.0,9.0,9.0
CLEAR ALL: NO
6–38
MN/CDM600.IOM
(N/Y)
Revision 7