Monitor: Stored-Events) Clr (Clear Event Log Buffer); Monitor:) Acm (Adaptive Coding And Modulation Parameters); Monitor:) Rx-Params (Rx Parameters) - Comtech EF Data CDM-760 Installation And Operation Manual

Front Panel Operation
CDM-760 Advanced High-Speed Trunking Modem

6.2.3.2.2 (Monitor: Stored-Events) Clr (Clear Event Log Buffer)

Event 001:001
Info:Log ERASED
Use the  arrow keys to select Y (Yes) to clear the Stored Events buffer. The default is N
(No). Press ENTER to clear the buffer, or press CLEAR to back out of the command and return to
the previous menu.
If there are faults present on the unit at this time, the modem will again time-stamp the faults
and generate new log entries.
6.2.3.3

(Monitor:) ACM (Adaptive Coding and Modulation Parameters)

Tx Modcod=8PSK
Rx Modcod=8PSK
This read-only screen provides the active ACM Mode information:
Parameter
Tx Modcod
RemEsNo
Rx Modcod
LocEsNo
6.2.3.4

(Monitor:) Rx-Params (Rx Parameters)

When the demodulator is not locked, this read-only screen appears as follows:
Otherwise:
Rx-Params: EsNo=>23.5 dB
ModCod: QPSK 1/2
Note the following:
Parameter
Es/No
16:21:58
8/9
8/9
Description
Displays the Tx ModCod.
Displays the EsNo reported by the remote modem.
Displays the Rx ModCod.
Displays the EsNo of the local unit.
Demodulator
Unlocked
Description
The value of the Es/No calculated by the demodulator. Es/No is the Energy per Symbol
received (Es) divided by the Noise Spectral Density (No). Note that the Es/No reading assumes
that a linear, non-distorted carrier is being received. If a carrier is operating at or near saturation
and there are nonlinear distortions, the Es/No reading may be inaccurate, especially when
demodulating 16APSk and 32APSK carriers.
25/04/14
RemEsNo:+20.0 db
LocEsNo:+19.9 db
RxLevel=
⌂F=+005.0
RxLevel= -31dBM
6–55
Revision 4
MN-CDM760
()
Clr:Y
dBM
kHz