4 DIAGNOSTICS
20
Field Description
OSD Description
”*”
Data
received
blank
No data received
Carrier Lock
Indicates whether the digital in-band receiver is locked to the carrier
OSD Description
YES Carrier
locked
NO Carrier
unocked
PCR Lock
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
SNR
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
Modulation
Mode
The values displayed on the OSD are:
64 QAM — 64 QAM digital channel
256 QAM — 256 QAM digital channel
Short Term
Error Count
The FEC errors (maximum count of 65535) at 5-second intervals. The Short Term
Error Count is cleared after polling.
Long Term
Error Count
The accumulation of the Short Term Error Count (maximum count of 65535). The
Long Term Error Count is cleared every 24 hours.
Tuned Freq
The actual frequency to which the tuner is programmed (Carrier Definition Frequency
+ 1.75 MHz).
