Motorola DCH70 Installation Manual page 28

4 DIAGNOSTICS
Field
Carrier Lock
PCR Lock
SNR
Modulation
Mode
Short Term
Error Count
Long Term
Error Count
Tuned Freq
Description
OSD Description
"*" Data received
blank No data received
Indicates whether the digital in-band receiver is locked to the carrier
OSD Description
YES Carrier locked
NO Carrier unocked
Indicates whether the in-band receiver is locked to the current program clock
reference for a digital service
OSD Description
YES Carrier locked
NO Carrier unlocked
When carrier lock has been established, displays an estimate of the carrier
signal-to-noise ratio in dB, with an explanation. This estimate is based on the QAM
cluster variance, which is proportional to the SNR.
GOOD — Good value
FAIR — Marginal signal level, check the signal
POOR — Unusable signal
The values displayed on the OSD are:
64 QAM — 64 QAM digital channel
256 QAM — 256 QAM digital channel
The FEC errors (maximum count of 65535) at 5-second intervals. The Short Term
Error Count is cleared after polling.
The accumulation of the Short Term Error Count (maximum count of 65535). The
Long Term Error Count is cleared every 24 hours.
The actual frequency to which the tuner is programmed (Carrier Definition Frequency
+ 1.75 MHz).
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