Config: Mask  Buffer Or Ref; Config: Mask  Rxif; Config: Mask  Txclk - Comtech EF Data CDM-625A Installation And Operation Manual

CDM-625A Advanced Satellite Modem
Front Panel Operation
•
Selecting Rx-Sat-AIS as Active generates a fault whenever the demodulator senses that
the 'all ones' condition is present in the receive data.
•
Typical for either, selecting AIS as Masked generates no alarms.
6.2.1.11.2 CONFIG: Mask  Buffer or Ref
Buffer Slip Alarm = Active (Active,Mask)
Reference Alarms = Active
◄ ►
Use the arrow keys to select Buffer Slip Alarm or Reference Alarms, and then typical for
either use the
▲▼
following:
•
Selecting the Buffer Slip Alarm as Active generates a Buffer Slip fault in the Rx faults
whenever the receive circuitry senses that the buffer is either underflowing or
overflowing.
6.2.1.11.3 CONFIG: Mask  RxIF
RxIF Alarms: AGC=Active
◄ ► arrow keys to select AGC or EbNo and then, typical for either, use the
Use the
keys to select the alarms as Active or Masked. Press ENTER when done. Note the following:
•
Selecting the AGC Rx IF Alarm as Active generates an AGC fault whenever the receive
signal level exceeds –20 dBm (for the desired carrier).
•
Selecting the EbNo Rx IF Alarm as Active generates an Eb/No fault whenever the
demodulator sees the receive Eb/No fall below the pre-determined value.
•
Typical for either, selecting the alarm as Masked, generates no alarms.
6.2.1.11.4 CONFIG: Mask  TxClk
Tx Clock Alarm: = Masked
(Valid in G.703 & Ext clock modes)
Use the ◄ ► arrow keys to select the Tx Clock Alarm as Active or Masked, and then press
ENTER. Note the following:
arrow keys to select as Active or Masked. Press ENTER when done. Note the
EbNo=Masked
6–49
()
(Active,Mask)
()
(Active,Masked)
()
Revision 0
MN-CDM625A
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