Motorola DCH200, Руководство по установке

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4 DIAGNOSTICS
21
Field Description
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:
ANALOG — analog channel
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 the tuner is programmed (Carrier Definition Fre 1.75
MHz).