Comtech EF Data CDM-570A - Manual (Page 142)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Front Panel Operation Revision 2
6–38
input level being applied causes compression in the IF stages, and consequently degrades the
performance of the demodulator.
6.3.2.9.3 (CONFIG: Alarm Mask) Ref
Reference Alarm:
Active Masked (◄ ►,ENT)
Use the ◄ ► arrow keys to select Active or Masked. Press ENTER.
When you select Active, the modem generates a Transmit Traffic fault whenever it sees that:
• External Reference is selected, and
• There is no signal activity at the External Reference port.
When you select Masked, the modem generates no alarm.
6.3.2.9.4 (CONFIG: Alarm Mask) BUC (CDM/R-570AL L-Band Units ONLY)
See Chapter 10. CDM-570A/570AL ODU (TRANSCEIVER, BUC, LNB) M&C OPERATIONS
for complete details about using this modem-specific menu branch.
BUC Alarm:
Active Masked (◄ ►,ENT)
Use the ◄ ► arrow keys to set the alarm as Active or Masked for the BUC (Block Up Converter),
if connected.
6.3.2.9.5 (CONFIG: Alarm Mask) LNB (CDM/R-570AL L-Band Units ONLY)
See Chapter 10. CDM-570A/570AL ODU (TRANSCEIVER, BUC, LNB) M&C
OPERATIONS for complete details about using this modem-specific menu branch.
LNB Alarm:
Active Masked (◄ ►,ENT)
Use the ◄ ► arrow keys to set the alarm as Active or Masked for the LNB (Low-Noise Block
Down Converter), if connected.