BroadBand reference Guide - Satellite Engineering Group

AQT - ATSC to QAM Transcoder
Each of the modules are displayed in order by scrolling through
the sequence to find the desired variable on a respective installed
module. Modules not installed are listed by the "Module is Not
Present" message. The SNR value for each module is displayed
together for each of the installed eight modules at the end of the
sequence.
• SNR is displayed when an AQT module locks to an input program
channel and indicates the signal to noise ratio of the input signal
and is expressed in dB. The following are the desired input SNR
ranges for the appropriate signal modulation type:
8VSB 64 QAM 256 QAM
Excellent = >30 dB >38 dB >38 dB
Good = 25—30 dB 30—38 dB 35—38 dB
Marginal = 18—25 dB 23—30 dB 30—35 dB
Non-Functional =