OPTIMOD-AM DIGITAL
INSTALLATION
2-13
gain reduction. You can switch the meter so that it either reads the gain reduc-
tion of the Master (above-200 Hz) band, or the difference between the gain re-
duction 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 five-band compressor. You can
only see its action from the Optimod PC Remote software.
Gain Reduction
meters show the gain reduction in the multiband compressors.
Full-scale is 25 dB gain reduction.
The gain reduction meters can be switched to indicate either the analog
AM processing or the digital radio processing.
Multimeters
(The rightmost pair of meters) show the instantaneous peak out-
put of the processed audio in units of percentage modulation or the gain reduc-
tion of the look-ahead limiter in the digital channel, in units of dB.
These meters can be switched to read the left/right digital processing
chain output signal, the gain reductions of the left and right look-ahead
limiters in the digital processing chain, or the analog processing chain
output signal. In the latter case, the left-hand meter reads negative peaks
of the higher of the two stereo channels and the right-hand meter reads
the higher of the positive peaks.
Studio Level Controller Installation (optional)
[Skip this section if you are not using a studio level controller ahead of the 9400.
Continue with “Quick Setup” on page 2-16.]
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 con-
tain instructions on how to use them in this application. They are the preferred
choices because their AGCs are identical to the AGC in the 8500.
Discontinued Orban products usable as external AGCs include the 8200ST, 464A
“Co-Operator,” 8100AST, and 1100 OPTIMOD-PC. In this manual, we do not pro-
vide step-by-step instructions for setting up all of these older products, although
it should be easy to extrapolate from the instructions we do provide.
Summary of Contents for Optimod-AM 9400
Page 1: ...Operating Manual OPTIMOD AM 9400 Digital Audio Processor Version 1 2 Software...
Page 7: ...Operating Manual OPTIMOD AM 9400 Digital Audio Processor Version 1 2 Software...
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Page 261: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 29...
Page 267: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 35 CPU Module...
Page 273: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 41 RS232 BOARD PARTS LOCATOR...
Page 275: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 43 8300 POWER SUPPLY PARTS LOCATOR...
Page 284: ...6 52 TECHNICAL DATA ORBAN MODEL 9400 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 292: ...6 60 TECHNICAL DATA ORBAN MODEL 9400 DISPLAY BOARD PARTS LOCATOR...
Page 293: ...OPTIMOD AM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...