Tiernan TDR60, Инструкция по установке и эксплуатации

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Troubleshooting
01-0868-401B 12/02 49
All faults begin with a command mnemonic, for example, DC, AD, etc. The
following table defines the command mnemonics and indicates the associated
TDR60 function.
All TDR60 faults, whether current faults or faults listed in the fault history log, are
listed in alphabetical order in the following table.
If a TTO FIFO error conditions occur more than three times within 60 seconds, the TDR60 reduces
the maximum number of teletext data from 16 to 15 lines per field or from 32 to 31 lines per frame.
Command Mnemonic TDR60 Function
MC Master Controller
QD QPSK Demodulator
DC Decoder Controller
AD x Audio Decoder
VD Video Decoder
UD
x
User Data
VBI Teletext Insertion Module
Faults
Descriptor Explanation Possible Cause
Bad E
b
/N
0
Input signal to noise ratio below
DVB specification Insufficient transmit power, improperly
oriented satellite dish, improperly polarized
LNB, or excessive cable loss
FIFO Idle Input to FIFO buffer has
stopped No video, audio, user data, or Teletext input
FIFO Ovrflw FIFO input rate exceeds output
rate Output clock too slow, input clock too fast, or
delay values too great
FIFO Udrflw FIFO output rate exceeds input
rate Output clock too fast, or input clock too slow
HW Fault Abnormal hardware condition
detected Hardware failure or incorrect configuration
Initialize Initialization failure Corrupted configuration files or hardware
failure
Input Loss No input signal detected Missing input signal or incorrect demodulator
configuration
NOTE