Comtech EF Data CDM-Qx Spezifikationen PDF herunterladen (Seite 97)

CDM-Qx Satellite Modem Revision 5

Front Panel Operation MN/CDMQx.IOM

5–43

If Transmit is selected the following sub-menu will be displayed:

Select Tx-FIFO, G.703-BPV, or Tx-AIS, using the ◄ ► arrow keys, then press ENT.

For each of the choices a sub-menu similar to the one shown below will be shown:

Select Active or Masked, using the ◄ ► arrow keys, then press ENT.

If the user selects Active, then a Transmit Traffic fault will be generated whenever the

transmitter sees that the transmit FIFO has slipped.

Similarly, the user can mask a G.703 BPV or Transmit AIS alarm.

If the user selects Masked, no alarm will be generated.

If Receive is selected the following sub-menu will be displayed:

Select AGC, Eb/No, Rx-AIS or Buffer, using the ◄ ► arrow keys, then press ENT. For

each of the choices a sub-menu similar to the one shown below will be shown:

Select Active or Masked, using the ◄ ► arrow keys, then press ENT.

If the user selects Active, then a Receive Traffic fault will be generated whenever the

demodulator sees that the composite input level being applied will cause compression in

the IF stages, and hence degrade the performance of the demodulator.

Similarly, the user can mask an Eb/No, Receive AIS or Buffer alarm.

If the user selects Masked, no alarm will be generated.

Tx Alarm Mask: Tx

IFO

G.703-BPV Tx-AIS (◄ ► ENT)

Tx-FIFO Alarm:

Active Masked (◄ ► ENT)

Rx Alarm Mask: AGC Eb/No

Rx-AIS Buffer (◄ ► ENT)

AGC Alarm:

Active Masked (◄ ► ENT)

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Comtech EF Data CDM-Qx Spezifikationen Seite 97