CDM-Qx Satellite Modem

Revision 5

Front Panel Operation

MN/CDMQx.IOM

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

Tx Alarm Mask: Tx-FIFO

G.703-BPV Tx-AIS (◄ ► ENT)

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:

Tx-FIFO

Alarm:

(◄ ► ENT)

Active

Masked

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:

Rx Alarm Mask: AGC Eb/No

Rx-AIS Buffer

(◄ ► ENT)

Select AGC, Eb/No, Rx-AISor 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:

AGC Alarm:

(◄ ► ENT)

Active Masked

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.

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Mocomtech CDM-QX operation manual Tx Alarm Mask Tx-FIFO BPV Tx-AIS ENT, Tx-FIFO Alarm ENT Active Masked, AGC Alarm