Orban OPTIMOD-FM 8700, Operating Manual

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OPERATION ORBAN MODEL 8700i

The two stereo channels are close to identical in magnitude and phase.
In this case, the enhancer assumes that the program material is actually
mono and thus suppresses enhancement to prevent the enhancement
from exaggerating the undesired channel imbalance.

The ratio of L–R / L+R of the enhanced signal tries to exceed the threshold set by
the L-R / L+R Ratio Limit control.
In this case, the enhancer prevents further enhancement in order to pre-
vent excess L–R energy, which can increase multipath distortion.
The stereo enhancer has the following controls:
Amount sets the maximum spatial enhancement.
Enhancer In / Out bypasses the stereo enhancer. O
UT
is equivalent to setting the
A
MOUNT
to 0.
L-R / L+R Ratio Limit sets the maximum amount of enhancement to limit the amount
of multipath distortion that the stereo enhancement can add. However, if the origi-
nal program material exceeds this limit with no enhancement, the enhancer will not
reduce it.
Diffusion applies only to the D
ELAY
enhancer. This control determines the amount of
delayed L–R added to the original signal.
Style sets one of two stereo enhancer types: 222 or D
ELAY
.
Depth sets the delay in the delay line. It applies only to the D
ELAY
enhancer.
Xponential Loudness Controls
The Xponential Loudness algorithm searches compressed music in real-time looking
for lost music details. It then intelligently corrects waveform deficiencies and re-
stores the harmonic impact of the original recording while bringing out otherwise
Xponential Loudness Controls
Basic / Intermediate Name Advanced Name Range
--- Bypass Mode Out / In
--- Bypass Gain
–20…+20 dB
--- Preset Profile
1…11, Flat Frequency Response
--- XL Less-More
–40…+30 dB
--- Low Frequency Trim
–10…+10 dB
--- High Frequency Trim
–10…+10 dB
--- M1 Trim
–10…+10 dB
--- M2 Trim
–10…+10 dB
Table 3-4: Xponential Loudness Controls