DT-4500 Series C- and Ku-Band Down Converters
MN/DT4500.IOM
Serial Interface Operation
Revision 2
8–22
8.7.3.6
CMM (Configure Mute Mode)
Use CMM to set or return the mute state of the unit during frequency changes.
The default state is OFF (output is muted during frequency changes). When mute
mode is ON, the unit will retain its mute state upon changing RF frequency.
Description
Details
Configure Mute Mode:
<DEV/CMM_xxx{cr} where:
xxx = ON or OFF
Confirmation:
>DEV/CMM_xxx{cr}{lf}]
Return CMM Status:
<DEV/CMM_{cr}
Confirmation:
>DEV/CMM_xxx{cr}{lf}]
8.7.3.7
CRM (Redundancy Mute Mode)
Use CRM to set or return the redundancy mute mode. This function determines
how the backup unit handles the mute state during a redundant switchover
condition. If CRM=ON, the backup unit’s mute state is the same as that of the
primary unit that it is backing up. Otherwise, if CRM=OFF, the backup unit
unmutes its output any time a redundant switchover occurs. The default state is
OFF (backup unit’s output automatically unmutes when a redundant switchover
occurs).
Description
Details
Set CRM:
<DEV/CRM_xxx{cr} where:
xxx = ON or OFF
Confirmation:
>DEV/CRM_xxx{cr}{lf}]
Return CRM:
<DEV/CRM_{cr}
Confirmation:
>DEV/CRM_xxx{cr}{lf}]
8.7.3.8
AFR (Auto Fault Recovery)
Use AFR to automatically mute the converter output in the event of a detected
fault. AFR causes the output signal to go active (unmuted) if all faults clear. If you
disable AFR, the output remains muted even after all faults clear until a
MUT_OFF command is received. The default is ON.
If you enable AFR and the converter detects the same fault more than five times
in a five minute interval (e.g., multiple IFLO lock detect faults) the function
reverts to DISABLED and the converter remains muted.
