TANDBERG TT1220 Instruction Manual page 115

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
QPSK Input:
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
ASI Input:
Instruction Manual: TT1220 Professional Receivers and Decoders
ST.TM.TT1220.4
Contents
Alarm Description
Tuner fail This alarm is set if the communication
with the tuner is lost.
No signal Alarm only if the RF level has been
zero for more than 2 consecutive times
No lock Demod will not be deemed to be locked
until full lock status has occurred for 3
consecutive polls
BER BER TOO HIGH is declared when BER
exceeded estimate exceeds # defined value for
FEC rate.
Contents
Alarm Description
No sync The input stage is not able to lock on to
the incoming signal.
Imp. Overflow The input rate is too high.
Alarm Categories and Conditions
Remedy Default
A
Check signal source A
Check input settings A
(frequency, FEC, symbol
rate etc.)
The input signal strength W
or quality is not
adequate.
Remedy Default
Check input A
connections. Verify that
the signal format is ASI,
compliant with the
specification given in
Annex B.
Use a transport stream A
with a lower bit-rate,
usually by reducing the
# of 0-packets
Page D-3