Comtech EF Data CDM-760 - CONFIG: INTF) (PIICX=ASI)  Bufsize (Rx Buffer Size); CONFIG: INTF) (PIICX=ASI)  Mask

Front Panel Operation Revision 4
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
6–40
6.2.2.4.4.3.3 (CONFIG: INTF) (PIICX=ASI)  Mask
TxPll:Fault TxFrmSync:Alarm
InpSigLoss:Alarm more… ()
RxPLL:Fault RxUF:Fault RxOF:Fault
()
These menus set how the modem reports interface alarm or fault states. Use the   arrow
keys to select TxPll, InpSigLoss, TxFrmSync, or more... to go to the next screens. From there, use
the   arrow keys to select RxPll, RxUF, or RxOF. Press ENTER. Note the following:
Selection (Alarm)
Description
TxPLL
The Tx Clock PLL is high or low, meaning that the Tx Clock Source is significantly different
than the rate of the transmitted data.
TxFrmSync
Tx Frame Sync is not achieved, meaning the PIIC ASI interface is unable to synchronize to
the incoming data frames.
InpSigLoss
Input Signal Loss means that the PIIC ASI interface TX-IN connector finds no traffic.
RxPLL
The Rx Clock PLL is railed high or low, meaning that the Rx Clock Source is significantly
different than the rate of incoming data.
RxOF
Rx Overflow means that the demodulator traffic is too fast for the RxClock clock setting. This
causes the buffer to overflow and to re-center, losing data in the process.
RxUF
Rx Underflow means that the demodulator traffic is too slow for the clock RxClock setting.
This causes the buffer to underflow and to re-center, losing data in the process.
Use the  arrow keys to set the report state for each selection as Alarm, Fault, Mask, or
Fault-Tx On. (The RxPll, RxOF, and RxUF selections provide only Alarm, Fault, and Mask.) Press
ENTER. Note the following:
Mask State
Front Panel LED
‘UNIT STATUS’
Color
Fault State
Causes
Redundancy
Switch
Mutes
Tx Carrier
Front Panel VFD
Visible Location
Alarm Amber None No No Monitor: Live Alarms menu
Fault Red
J1 Alarm
Connector
Yes Yes Monitor: Stored-Events Log
Mask None None No No
None: A masked event is
not logged and is not seen
in any menu.
Fault-Tx On Red
J1 Alarm
Connector
Yes No Monitor: Stored-Events Log
6.2.2.4.4.3.4 (CONFIG: INTF) (PIICX=ASI)  BufSize (Rx Buffer Size)
Use the  arrow keys to change the Rx Buffer Size time value. Press ENTER. Valid settings are:
Range
Step Size
Minimum
Maximum
2 ms 75 ms 0.5 ms