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FM-531HD / May 2013
F M - 5 3 1 H D G U R U G U I
3-D Plot
A 3‑D plot of the audio shows the last ten seconds of audio and what the audio levels
were at each frequency in the audio spectrum during that time.
The 3‑D plot can be very helpful when looking at how the audio spectrum has been
behaving over time. The higher the signal is in the plot, the larger the signal amplitude
at the frequency of the peak.
SDR™
During development of the FM‑531HD product we invented the
Spectral Dynamic
Range™ Meter
in order to assist us in evaluating what was happening in our new FM531‑HD
clipper as it managed the audio spectrum.
We made the SDR meter very easy to interpret – the longer the blue bars, the more
dynamic range there is between the peak amplitude and its RMS (loudness) level inside
each of the 31 limiter bands. Conversely, the shorter the bar’s length is, the denser the
audio is in that limiter band.
A-Clip
During development of our new FM clipper we realized that the only way to visually
monitor what the FM531‑HD clipper was doing was to invent a way to watch it work.
The A-Clip display was born out of that idea.
This display shows in detail,
where
in the spectrum the FM531‑HD’s distortion man
-
agement is being accomplished, and by
how much
. Like a weather radar image, the “red
-
der” the display, the more active the work being done in that part of the audio spectrum.
Summary of Contents for FM-531 HD
Page 2: ...Technical Manual Wheatstone Corporation May 2013 FM HD Digital Audio Processor FM 531hd...
Page 122: ...page A 2 FM 531HD May 2013 A P P E N D I C E S Appendix A General Specifications A 3 Contents...
Page 128: ...page A 8 FM 531HD May 2013 A P P E N D I C E S Appendix B FM 531HD GPI Interface A 9 Contents...
