Motorola DCT1800 사용자 설명서

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: 

The digital section is still in the initial state. If this occurs, 
check diagnostic d07. 

Good value 

Marginal signal level 

−

 check the signal 

Unusable signal 

Indicates the modulation modes for analog and digital channels with the 
following variables: 

Modulation Mode 

channels  Analog 

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).