Monitor: Stored Events - Comtech EF Data CDM-625A Installation And Operation Manual

CDM-625A Advanced Satellite Modem
Front Panel Operation
Alarm Type
Rx
(Receive)
Net (Unit
Network)
BUC
LNB
6.2.3.2

Monitor: Stored Events

Stored Events:
#199 FT- Frame Sync
An example of a Stored Events screen is shown here. Use the
character on the bottom line, and then use the
the event log entries. Press ENTER or CLEAR to return to the previous menu.
Description
Indicates either the demodulator or the following FEC decoder cannot
Demod Lock
lock to the incoming signal.
Indicates if the demod signal level is out of range.
AGC Alarm
Indicates t hat t he de -framing u nit ( EDMAC, I BS or I DR) or R eed-
Solomon outer decoder cannot synchronize to the data being sent to it
Frame Sync
by the demod and/or FEC decoder.
Occurs w hen Doppler or Plesiochronous ef fects c ause t he Rx data
Buffer Slip
buffer to empty or fill completely, which results in a reset to 50%.
Alarm I ndication S ignal ( all 1' s) is m onitored if present at t he R x
Rx AIS
satellite input.
Occurs when the monitored level drops below what was programmed
EbNo Alarm
via menus: Config, Rx, EbNo Alarm point.
Indicates that the desired buffer reference is not present, causing the
Buffer Clock
buffer to fall back on Rx satellite timing to clock its output.
Loss of Tx frame occurs in Drop & Insert operation, when the incoming
Loss TxFrm
T1 or E1 frame cannot be found by the modem.
This error rate monitor is enabled for IBS and IDR framing.
BER >10E-3
Loss of T x m ultiframe oc curs i n E 1-CAS D &I oper ation, w hen t he
Loss TxMul
multiframe marker for CAS signaling data cannot be found.
An A IS condition i n t he s ignaling pos itions of an incoming E 1-CAS
Tx Sig AIS
frame is monitored.
Indicates t he pr esence of t he Tx t errestrial r emote al arm on t he
Tx Terr RM
incoming T1 or E1 frame.
Indicates t he pr esence of t he I BS satellite r emote al arm ( backward
IBS Rx Rem
alarm) on the incoming IBS frame from the transmit side of the link.
Multi-destination backward al arms ar e t he c orresponding s atellite
IDR Rx BW1-4
alarms used by the IDR frame structure.
Backward alarms 1-4 indicate that the hardware inputs available on the
back panel of the modem have t riggered, resulting in the generation,
IDR Tx BW1-4
by the modem's IDR framer, of a corresponding Tx backward alarm.
Chapter 10. CDM-625A ODU (TRANSCEIVER, BUC, LNC) OPERATIONS
Clear-All: No (No,Yes)
25/10/07 16:25:24
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