page 3 – 33
FM-531HD / May 2013
F M - 5 3 1 H D P R O G U I
L/R Reverse
The L/R Reverse
flips left and right on the HD output to correct for any wiring
issues between the two channels. Phase reverse compensates for a known bug in cer
-
tain software versions of older HD exciters.
Phase Reverse
Certain software versions within the iBiquity HD Radio system have an inadver
-
tent signal polarity inversion putting the analog and digital signals 180 degrees out
of phase resulting in audible flanging as the two signals crossfade in a listener’s HD
receiver. When the
Phase Reverse
check box is checked, it flips the polarity of the
HD Radio AES/EBU output signal by 180 degrees to compensate for this anomaly.
FM LIMITER MENU
The 31‑band
FM Limiter
screen contains the controls necessary for fine tuning the
sound of the FM output and adjusting its peak control method. These controls allow
the user to make many tradeoffs between loud and clean, in ways that have never been
available before in an FM peak limiter.
31 Band Drive
The 31 Band Drive
control determines the amount of input signal
applied to the 31‑band limiter – less drive creates a more gentle sound
while still controlling peaks. Higher settings make the sound more
aggressive by increasing short term density. Extremely high drive set
-
tings which cause more than 5‑6 dB of continuous gain reduction are
unnecessary, can become fatiguing, and may create a less than desirable
operating condition for a perceptual codec. The
31 Band Drive
control
is adjustable from 80 to 100%.
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...
