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Field
SNR
Modulation Mode
Short Term Error Count
Long Term Error Count
Tuned Frequency
Description
Displays an estimate of the carrier signal-to-noise ratio. The SNR displayed is a
measure of the QAM cluster variance, which is proportional to the SNR.
Analog channels display analog for carrier lock. The SNR displays a number for
the numeric value and blank for the ssss value.
The following variables can display:
Blank
The digital section is still in the initial state. If this occurs,
check diagnostic d07.
GOOD
Good value
FAIR
Marginal signal level − check the signal
POOR
Unusable signal
Indicates the modulation modes for analog and digital channels with the following
variables:
Channels
Modulation Mode
Analog channels
Analog
Digital channels
QAM 64
QAM 256
Indicates the FEC errors (maximum count of 65535) at 5-second intervals. The
Short Term Error Count is cleared after polling.
Indicates the accumulation of the Short Term Error Count (maximum count of
65535). The Long Term Error Count is cleared every 24 hours.
Indicates the actual frequency the tuner is programmed (Carrier Definition
Frequency + 1.75 MHz).
Diagnostics
B-9
DCT1700 Installation Manual
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