Orban OPTIMOD-FM 8600, Operating Manual

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INTRODUCTION ORBAN MODEL 8600
Five-Band (12 ms delay), Ultra-Low-Latency Five-Band (3.7 ms delay), and
Two-Band
(17 or 22 ms delay) for a transparent sound that preserves the fre-
quency balance of the original program material. A special Two-Band preset cre-
ates a no-compromise “Protect” function that is functionally similar to the “Pro-
tect” structures in earlier Orban digital processors.
The 8600’s two new
“MX” structures (five-band and two-band) are similar to
their 8500 counterparts except that they use the 8600’s new peak limiting tech-
nology to
decrease distortion while achieving substantial improvements in
transient punch
and
high frequency clarity
. This advanced technology re-
quires more input-to-output delay than the older structures, so it is impractical
for talent to monitor these structures off-air with headphones. The 8600 offers a
special
low-delay monitor output for this purpose.
•
The 8600
can increase the density and loudness
of the program material by
multiband compression, limiting, and clipping—improving the consistency of the
station’s sound and increasing loudness and definition remarkably, without pro-
ducing unpleasant side effects.
•
The 8600
rides gain
over an adjustable range of up to 25 dB, compressing dy-
namic range and compensating for both operator gain-riding errors and gain in-
consistencies in automated systems.
•
The 8600’s Two-Band processing structures can be made phase-linear to maxim-
ize audible transparency.
•
Automatic Multipath Mitigator / phase skew corrector , when activated,
removes phase shifts between all elements in the input audio, converting the
audio into “intensity stereo.” By removing phase shifts between the left and
right channels, it minimizes the amount of energy in the stereo subchannel,
which consequently
minimizes multipath distortion without compromis-
ing stereo separation .
This process can not only correct problems due to
phase skew between the left
and right channels of an analog recording due to head gap misalignment, it can
also correct
comb filtering caused by spaced microphones feeding the left and
right channels, which can occur on drum kits and other sources that have been
multi-miced.
The process also
minimizes the amount of peak overshoot during SSB/VSB
operation of the stereo encoder , thus minimizing the amount of composite
limiting needed to constrain peak modulation to 100%.
Controllable
•
The 8600 can be remote-controlled by 5-12V pulses applied to eight pro-
grammable, optically isolated GPI (general-purpose interface) ports.