Orban OPTIMOD-FM 8700, Operating Manual

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OPTIMOD-FM DIGITAL OPERATION
3-69
There are two sets of mixer controls, one for the analog processing chain and one
for the HD processing chain.
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 8700i more vulnerable to unexpected audible dis-
tortion with certain program material. Therefore, you should make large
changes in EQ with the bass and parametric equalizers and the HF en-
hancer, because these are located
before the compressors. The compres-
sors 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-
Band Mix
Intermediate Name Advanced Name Range
Band Mix 1 B1 Out Mix
–6.0 … +6.0 dB
Band Mix 2 B2 Out Mix
–6.0 … +6.0 dB
Band Mix 3 B3 Out Mix
–6.0 … +6.0 dB
Band Mix 4 B4 Out Mix
–6.0 … +6.0 dB
Band Mix 5 B5 Out Mix
–6.0 … +6.0 dB
Mute Band 1 Band 1 On/Mute On, Mute
Mute Band 2 Band 2 On/Mute On, Mute
Mute Band 3 Band 3 On/Mute On, Mute
Mute Band 4 Band 4 On/Mute On, Mute
Mute Band 5 Band 5 On/Mute On, Mute
—
B1MaxDeltGR
0 … 24 dB, Off
—
B2MaxDeltGR
0 … 24 dB, Off
—
B3MaxDeltGR
0 … 24 dB, Off
—
B4MaxDeltGR
0 … 24 dB, Off
—
B5MaxDeltGR
0 … 24 dB, Off
(see Multiband screen) B2 > B1 Coupl 0 ... 100 %
(see Multiband screen) B2 > B3 Coupl 0 ... 100 %
(see Multiband screen) B3 > B2 Coupl
0 … 100 %
(see Multiband screen) B3 > B4 Coupl 0 ... 100 %
(see Multiband screen) B4 > B5 Coupl 0 ... 100 %
Table 3-12: MB Band Mix Controls