Orban Optimod-TV 8382, Operating Manual

Page: 52 / 244

2-10
INSTALLATION ORBAN MODEL 8382

Input meters show the peak input level applied to the 8382’s analog or digital
inputs with reference to 0 = digital full-scale. If either input meter’s red segment
lights up, you are overdriving the 8382’s analog to digital converter. This is a very
common cause of audible distortion.

AGC meter shows the gain reduction of the slow two-band AGC processing that
precedes the multi-band compressor. Full-scale is 25 dB gain reduction. You can
switch the meter so that it reads the gain reduction of the Master (above-200
Hz) band, the Bass (below-200Hz) band, or the difference between the gain re-
ductions in the Master and Bass bands.
The latter reading is useful for assessing the dynamic bass equalization
that the AGC produces, and it helps you set the AGC BASS COUPLING
control.

Gate LED indicates gate activity, lighting when the input audio falls below the
threshold set by the AGC gate threshold control (via the Full Modify screen’s
AGC G
ATE
control). When this happens, the AGC’s recovery time is slowed to
prevent noise rush-up during low-level passages.
There is also an independent gate for the multiband compressor (2-band
and 5-band). You can only see its action from the Optimod PC Remote
software.

Gain Reduction meters show the gain reduction in the multiband compressor.
Full-scale is 25 dB gain reduction.
When the Multiband structure is operating, all the meters indicate gain
reduction.
When the Two-Band structure is operating, the two leftmost meters indi-
cate gain reduction in the Master and Bass bands, the two middle meters
indicate the gain reduction in the two-band high frequency limiter, and
the rightmost meter indicates the action of the HF Enhancer.
When the processing is in dual-mono mode, the gain reduction meters
can be toggled between channel 1 or channel 2 via
S
ETUP
/M
ETER
M
ODE
or,
when you are in the Main screen, by pressing the P
REV
button for chan-
nel 1 and the N
EXT
button for channel 2. Meanwhile, the PC Remote ap-
plication displays both channels’ gain reductions simultaneously.

Output Level meters show the instantaneous peak output of the processed au-
dio in units of percentage modulation.
Studio Level Controller Installation (optional)
[Skip this section if you are not using a studio level controller ahead of the 8382.
Continue with “Quick Setup” on page 2-13.]

As of this writing, the currently manufactured Orban products that can be used
as external AGCs are Optimod-PC 1101 and Optimod 6300. Their manuals contain