Why does my level meter say “NO AUDIO”?

Why does my level meter say “NO AUDIO”?

The "NO AUDIO" text appearing in the level bars (and subsequent lack of analog output from the instrument) is determined by the "Non Audio" bit in an AES stream being set. The "NO AUDIO" display in the WVR6100/7100 or WFM6100/7000/7100 level bars is independent of the presence of audio data or the levels themselves.