Diagnostics 4-13
DCT5100 Installation Manual
Signal-to-Noise Ratio (SNR)
The IB SNR displays on the OSD as an estimate of the carrier signal-to-noise ratio in dB with
an explanation for the value.
Table 4-16 lists the values:
Table 4-16
In-Band SNR - OSD
Value Description
GOOD
Good value
FAIR
Marginal signal level, check the signal
POOR
Unusable signal
INVALID
SNR value not valid
This display is only valid when carrier lock has been established.
Automatic Gain Control (AGC)
An estimate of the AGC displays in percentage and an explanation for the value displays on the
OSD.
Table 4-17 lists the values and description for the OSD:
Table 4-17
In-Band AGC values - OSD
Value Description
GOOD
Good value
FAIR
Marginal signal level, check the signal
POOR
Unusable signal
INVALID
AGC value not valid
This display is only valid when carrier lock has been established.
5 SECOND ERROR COUNTS
The 5 SECOND ERROR COUNTS represents the number of correctable and uncorrectable
errors in the digital multiplex. The display is updated every 5 seconds and is reset each time the
set-top is power cycled or another digital multiplex is tuned. The count is shown in decimal
format and the maximum value is 9999. The maximum value displayed is 9999 even if the
number of errors exceeds 9999.
