Orban OPTIMOD-FM 8600Si, Руководство по эксплуатации

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OPERATION ORBAN MODEL 8600Si
The sum of the high frequency limiter control signal and the output of
the
B
AND
4 > 5 C
PL
control determines the gain reduction in band 5. The
B
AND
4 > 5 C
PL control receives the independent left and right band 4
gain control signals; this feed is unaffected by the band 4
M
AX
D
ELTA
G/R
control. Range is 0 to 100% coupling.
Band 3 > 2 Coupling and Band 2 > 3 Coupling controls determine the extent to
which the gains of bands 2 and 3 track each other.
When combined with the other coupling controls, these controls can ad-
just the multiband processing to be anything from fully independent op-
eration to quasi-wideband processing.
Band 2 > 1 Coupling control determines the extent to which the gain of band 1
(below 100 Hz) is determined by and follows the gain of band 2 (centered at 400
Hz). Set towards 100% (fully coupled) it reduces the amount of dynamic bass boost,
preventing unnatural bass boost in light pop and talk formats. Set towards 0% (in-
dependent), it permits frequencies below 100 Hz (the “slam” region) to have maxi-
mum impact in modern rock, urban, dance, rap, and other music where bass punch
is crucial. The default setting is 30%.
MB Band Mix controls determine the relative balance of the bands in the multi-
band compressor. Because these controls mix after the band compressors, they do
not affect the compressors’ gain reductions and can be used as a graphic equalizer
to fine-tune the spectral balance of the program material over a
±
6 dB range.
There are two sets of mixer controls, one for the analog processing chain and one
for the HD processing chain. The mixer controls for the HD processing chain also de-
termine the spectral balance of the low-delay monitor output.
The range of the band mix controls has been purposely limited because
the only gain control element after these controls is the back-end clip-
ping system (including the multiband clipper / distortion controller),
which can produce considerable audible distortion if overdriven. The
thresholds of the individual compressors have been carefully tuned to
prevent audible distortion with almost any program material. Large
changes in the frequency balance of the compressor outputs will change
this tuning, leaving the 8600Si more vulnerable to unexpected audible
distortion with certain program material. Therefore, you should make
large changes in EQ with the bass and parametric equalizers and the HF
enhancer, because these are located
before the compressors. The com-
pressors will therefore protect the system from unusual overloads caused
the chosen equalization. Use the multiband mix controls only for fine-
tuning.
You can also get a similar effect by adjusting the compression threshold
of the individual bands. This is comparably risky with reference to clipper
overload, but unlike the
MB B
AND
M
IX
controls, does not affect the fre-
quency response when a given band is below threshold and is thus pro-
ducing no gain reduction.
On/Mute switches allow you to listen to any band (or any combination of bands) in-
dependently. This is a feature designed for intermediate or advanced users and de-
velopers when they are creating new 8600Si presets. The mute control for a given
band affects
both the FM and HD processing because it mutes the input of compres-