Mocomtech CDM-QX - Manual (Page 103)

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Front Panel Operation MN/CDMQX.IOM
5–37
5.4.8 CONFIG: Mask
Alarm Mask: Transmit Receive
Reference BUC LNB (◄ ►,ENT)
Select Transmit, Receive, Reference – and when applicable with an appropriately-equipped
CDM-QxL L-Band unit – BUC or LNB the using the ◄ ► arrow keys, then press
ENTER
.
5.4.8.1 CONFIG: Mask
Æ Transmit
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
ENTER
.
Note: The functionality of the Active and Masked selections shown for CONFIG: Mask Æ
Transmit Æ Tx-FIFO are essentially identical for the CONFIG: Mask Æ Transmit Æ G.703-
BPV and CONFIG: Mask Æ Transmit Æ Tx-AIS submenus.
CONFIG: Mask Æ Transmit Æ Tx-FIFO
Tx-FIFO Alarm:
Active Masked (◄ ► ENT)
Select Active or Masked using the ◄ ► arrow keys, then press
ENTER
. If Active is
selected, then a Transmit Traffic fault will be generated whenever the transmitter sees that the
Transmit FIFO has slipped. If Masked is selected, no alarm will be generated.
5.4.8.2 CONFIG: Mask
Æ Receive
Rx Alarm Mask: AGC Eb/No
Rx-AIS Buffer (◄ ► ENT)
Select AGC, Eb/No, Rx-AIS or Buffer using the ◄ ► arrow keys, then press
ENTER .
Note: The functionality of the Active and Masked selections shown for CONFIG: Mask Æ
Receive Æ AGC are essentially identical for the CONFIG: Mask Æ Receive Æ Eb/No,
CONFIG: Mask Æ Receive Æ Rx-AIS, and CONFIG: Mask Æ Receive Æ Buffer submenus.
CONFIG: Mask
Æ Receive Æ AGC
AGC Alarm:
Active Masked (◄ ► ENT)
Select Active or Masked using the ◄ ► arrow keys, then press
ENTER
. If Active is
selected, 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.