Monitor: Live Alarms) Unit; Monitor: Live Alarms) Receive (Receive Traffic Status); Monitor: Live Alarms) Transmit (Transmit Traffic Status); Monitor: Rx-Params - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Front Panel Operation

5.2.2.2.1.1 (MONITOR: Live Alarms) Unit

Unit Fault: -12 Volt PSU
is Under-Voltage
This screen indicates if there are any Unit Faults. If not, it displays '
return to the previous menu.

5.2.2.2.1.2 (MONITOR: Live Alarms) Receive (Receive Traffic Status)

Rx Traffic: AGC Alarm -
Reduce Input level (ENT)
This screen indicates if there are any Receive Traffic Faults. If not, it displays '
ENTER to return to the previous menu.

5.2.2.2.1.3 (MONITOR: Live Alarms) Transmit (Transmit Traffic Status)

Tx Traffic: No Tx Clock
from Terrestrial (ENT)
This screen indicates if there are any Transmit Traffic Faults. If not, it displays '
ENTER to return to the previous menu.
5.2.2.2.2

MONITOR: Rx-Params

EbNo>16.0dB
ΔF 0.0k
If the demodulator is locked, information displays as shown here.
Note the following:
Item Description
This shows the value of
EbNo=
per information bit (
BER= This is an estimate of the corrected BER.
∆F= The frequency offset of the received carrier, in kHz, with a displayed resolution of 100 Hz.
(Buffer fill state) This shows the fill state (in percent), of the receive Buffer. After a reset, it will read 50.
Buf=
A value <50 indicates that the buffer is emptying, and >50 indicates that it is filling.
(Receive Signal Level) A value in dBm, indicating the input power of the desired carrier, as seen by
RSL=
the demodulator. If the signal level is below the AGC range of the demod, this will display RSL <-99.
Otherwise, if the demodulator is not locked, the message 'Demod: Not Locked' appears, but the
screen continues to display the receive signal level, as per the example that follows.
(ENT)
BER=0.0E-9
Buf=50 RSL=-42
E /N
calculated by the demodulator. The value referred to here is the energy
b 0
E
i), divided by the noise spectral density (N
b
).
0
5–35
Revision 12
MN/CDM570L.IOM
None '. Press ENTER to
None
'. Press
None '. Press