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CDM-Qx Satellite Modem Revision 5
Front Panel Operation MN/CDMQx.IOM
5–55
5.6.2.2 (MonitorRx-Params) – RECEIVE-PARAMETERS
If the user selects Rx-Params, the following sub-menu is displayed:
If the demodulator is locked, this screen shows 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
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
If the demodulator is not locked, this screen shows the message ‘‘Demod: Not
Locked’, but continuing to display receive signal level the Pressing ENT or
CLR will take the user back to the previous menu.
5.6.2.3 (MonitorEvent-Log) – EVENT-LOG or STORED EVENTS
If the user selects Event-Log, the following sub-menu is displayed:
Select View or Clear-All, using the ◄ ► arrow keys, then press ENT.
If the user selects View, the following screen is displayed:
EbNo=05.7dB BER=3.4E
-
9
UF=+11.7k Buf=50% RSL=
-
2
4dBm
Stored Events:
View Clear-All (◄ ►,ENT)
Demodulator: Not Locke
d
UF=+11.7k RSL=
-
2
4dBm