Comtech EF Data CDM-750, Installation And Operation Manual

Page: 91 / 300

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Front Panel Operation MN-CDM750
5–15
(CONFIG: INTF) PIICX (OC3)
Æ
ClkSource
Æ
RxClock
Rx Clock Source: RX CLK
(
)
To set the clock source by which Rx data is clocked out of the OC3/STM ‐ 1 interface to the
external baseband equipment: Use the
ST
arrow keys to select RX SAT , INT CLK , or TX CLK , and
then press ENTER .
(CONFIG: INTF) PIICX (OC3)
Æ
RxBuffer
Rx Buffer: BufferSize ReCenter
Fill Status = 00% (
)
Use the
W X
arrow keys to select BufferSize or ReCenter , and then press ENTER .
The bottom line displays the present RxBuffer Fill Status as a percentage. If the RxBuffer Fill Status
is dropping (approaching 0%), this indicates that the Rx traffic is not keeping up with the Rx Clock
setting and a data underflow is occurring. If the RxBuffer Fill Status is increasing (approaching
100%) the Rx traffic is coming in faster than the Rx Clock setting accommodates, and a data
overflow is occurring.
(CONFIG: INTF) PIICX (OC3)
Æ
RxBuffer
Æ
BufferSize
Rx Buffer Size: 02.0 ms
(
)
Use the
ST
arrow keys to increment/decrement the Rx Buffer Size time value (from 2 ms to 75
ms in 0.5 ms steps), and then press ENTER .
(CONFIG: INTF) PIICX (OC3)
Æ
RxBuffer
Æ
Recenter
Rx Buffer: ReCenter
(
)
In the event of data underflow or overflow (as indicated by the Fill Status percentage reported
on the RxBuffer menu) press ENTER to ReCenter the Rx Buffer depth to 50%.
(CONFIG: INTF) PIICX (OC3)
Æ
Mask
Masks: TxPll InpSigLoss
RxPll RxOF RxUF
To define how many or how few of the interface alarm or fault states are reported: Use the
W X
arrow keys to select TxPll, InpSigLoss, RxPll , RxOF , or RxUF , and then press ENTER . Note the
following: