TANDBERG M2/TT1220CIF/D, Инструкция по эксплуатации

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Alarm Categories and Conditions
Instruction Manual: Professional Receivers and Decoders (IRD) Page D-3
ST.TM.TT1220.1
D.1 Alarm Conditions
This chapter lists the alarm conditions detected by the unit. It also lists a
description for the alarm, a possible remedy, and the default state of the
alarm in the alarm configuration menu.
D.2 Input Stage Alarms
D.2.1 QPSK Input Alarms
The QPSK input alarms relate to alarms received form the DVB-S QPSK
demodulator, or the lack of communication with this component.
Table D.1: QPSK Alarm Categories and Conditions
Alarm Category Contents
Alarm Description Remedy Default
Tuner fail This alarm is set if the
communication with the
tuner is lost. A
No signal Alarm only if the RF level
has been zero for more than
2 consecutive times Check signal source A
No lock Demod will not be deemed to
be locked until full lock
status has occurred for 3
consecutive polls Check input settings
(frequency, FEC,
symbol rate etc.) A
QPSK Input:
BER
exceeded BER TOO HIGH is declared
when BER estimate exceeds
# defined value for FEC rate. The input signal
strength or quality is
not adequate. W
D.2.2 ASI Input Alarms
The ASI input alarms relate to the condition of the ASI input.
Table D.2: ASI Alarm Categories and Conditions
Alarm Category Contents
Alarm Description Remedy Default
No sync The input stage is not able to
lock on to the incoming
signal. Check input
connections. Verify
that the signal
format is ASI,
compliant with the
specification given
in Annex B. A
ASI Input:
Imp. Overflow The input rate is too high. Use a transport
stream with a lower
bit-rate, usually by
reducing the # of
0-packets A