Mocomtech CDM-QX - Manual (Page 110)

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Front Panel Operation MN/CDMQX.IOM
5–44
IMPORTANT
5.5.1.4 MONITOR: Alarms
Æ ODU
This feature is operable only for CDM-QxL L-Band units.
ODU Alarms: None
(ENT)
This read-only screen indicates if there are any ODU Alarms. If not, it displays ‘None’. Press
ENTER
to return to the previous menu.
5.5.2 MONITOR: Rx-Params
EbNo=05.7dB BER=3.4E-9
UF=+11.7k Buf=50% RSL=-24dBm
When the demodulator is locked, information appears on the Rx-Params screen as shown in the
above example. Note the following:
Eb/No
This shows the value of Eb/No calculated by the demodulator. The value referred to here is
the energy per information bit (Ebi), divided by the noise spectral density (No).
BER This is an estimate of the corrected BER.
UF
This is the frequency offset of the received carrier, in kHz, with a displayed resolution of 100
Hz.
Buf
(Buffer fill state) This shows the fill state, in percent, of the receive Buffer. After a reset, it will
read 50. A value <50 indicates that the buffer is emptying, and >50 indicates that it is filling.
RSL
(Receive Signal Level) A value in dBm, indicating the input power of the desired carrier, as
seen by the demodulator. If the signal level is below the AGC range of the demod, this will
display RSL <-99.
When the demodulator is not locked, the following information appears on the Rx-Params screen:
Demodulator: Not Locked
UF=+11.7k RSL=-24dBm
As per this second example, this screen shows the message ‘Demodulator: Not Locked’
but continues to display the receive signal level. Press
ENTER
or
CLEAR
to return to the
previous menu.
5.5.3 MONITOR: Event-Log
Stored Events:
View Clear-All (◄ ►,ENT)
Select View or Clear-All using the ◄ ► arrow keys, then press
ENTER
.