Comtech EF Data CDM-570A Installation And Operation Manual page 153

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Front Panel Operation
interval, the modem calculates and records the average E
during the interval. Similarly, the modem calculates the TPLI along with the highest value seen
during the interval.
If the demod loses lock during the measurement interval, the minimum E
shows 'Loss' rather than indicates a value. However, the average value (while
the demod was locked) will still be calculated and shown. If, on the other hand,
you unlock the demodulator for the entire measurement interval, the average
E
•
If the measured values are greater than or equal to 16.0 dB, the display shows '16.0'.
•
When you do not enable AUPC, both maximum and average TPLI shows '0.0'.
Examples: 08.0,13.5,2.5,1.8 means:
In IP-ACM mode:
Sta198:02/11/13 10:37:32
16.0,16.0,0,B,0,3 (▲ ▼)
The bottom line calculates and then displays statistics data as follows:
16.0,16.0,0,B,0,3 means:
Example:
Minimum E
Average Eb/N0 observed in the measurement interval = 16.0 dB
The Rx ModCod, in hex format, that was current when the entry was logged = 0
Maximum Rx ModCod, in hex format, during the measurement interval = B
Minimum Rx ModCod, in hex format, during the measurement interval = 0
Number of Rx ModCod changes, in hex format, during the measurement interval = 3
/N will also show 'Loss'. (The display shows 'Loss, Loss'.)
b 0
Minimum E /N observed in the measurement interval = 8.0 dB
b 0
Average E /N observed in the measurement interval = 13.5 dB
b 0
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 E /N observed in the measurement interval = 4.5 dB
b 0
Maximum TPLI observed in the measurement interval = AUPC disabled
Average TPLI observed in the measurement interval = AUPC disabled
/N observed in the measurement interval = 16.0 dB
b 0
/N
b 0
6–45
MN-CDM570A
Revision 3
and the minimum value seen
/N
b 0