Comtech EF Data CDM-570AL - MONITOR: Stats (Link Statistics); MONITOR: Stats (Link Statistics)) View

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
Front Panel Operation 6–51 MN-CDM570A
6.3.3.5 MONITOR: Stats (Link Statistics)
If you change your operating mode between IP-ACM Mode and any mode other
than IP-ACM Mode, Comtech EF Data recommends that you first execute Clear-
All from the MONITOR: Stats screen before you attempt to retrieve any further
statistics.
Link Statistics: View
Clear-All Config(◄ ►,ENT)
Use the
◄ ► arrow keys to select View, Clear-All, or Config. Press ENTER.
6.3.3.5.1 (MONITOR: Stats (Link Statistics)) View
Sta198:11/02/15 10:37:32
16.0, 16.0, 9.0, 9.0(▲ ▼)
The Link Statistics Log stores up to 255 events. Typical for all operating modes, the top line
indicates the log entry number, and the time and date of the entry. Use the ▲▼arrow keys to
browse through the available entries. Press ENTER or CLEAR to return to the previous menu.
In accordance with European convention, the date appears in DAY-MONTH-YEAR
format.
In any operating mode other than VersaFEC ACM (IP-ACM) / VersaFEC-2 ACM
(V2-ACM) Mode:
The bottom line shows the measured and recorded statistics data: Minimum E
b
/N
0;
Average
E
b
/N
0;
Maximum TPLI; and Average TPLI.
TPLI = Transmit Power Level Increase – you must enable AUPC to review TPLI.
The meaning and format of the numbers is as follows:
• Once you define a measurement interval (see MONITOR: Stats  Config), the modem
observes E
b
/N
0
and TPLI at a once-per-second rate during this interval. At the end of the
interval, the modem calculates and records the average E
b
/N
0
and the minimum value seen
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
b
/N
0
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
b
/N
0
will also show ‘Loss’. (The display shows ‘Loss,
Loss’.)
• If the measured values are greater than or equal to 16.0 dB, the display shows ‘16.0’.