Revision: 1.0
Sapphire-RXD3 Setup Guide
Copyright © 2022 Domo Tactical Communications (DTC) Limited. All rights reserved.
Commercial in Confidence
Page 6-23
Diagnostics
Achieving a good receive signal is key to RF performance. The
RX>Status
page is a good place to
monitor critical RF performance indicators.
With no RF lock, the Signal Strength should have a value of around -110dBm which indicates a low
noise floor at the input. If this level is raised significantly, it could indicate that noise will adversely
affect the SNR (signal-to-noise) level when a RF signal is received which will need to be investigated.
The RF noise floor can also be monitored by clicking the FFT File for the input. This will open a
spectrum analysis if the received COFDM signal. An ideal receive signal should have a uniform shape
with strong shoulder height. Example below.
Another key indicator of RF performance is the Post Viterbi errors, these are errors that cannot be
corrected by the receiver’s signal processor. Pre Viterbi can be monitored to ensure Post Viterbi errors
do not occur.