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OPTIMOD-PC
F
ILTER
C) Set the AGC
[Enabled] or [Disabled]
This control turns OPTIMOD-PC's internal AGC (Automatic Gain Control)
on [enabled] or off [disabled].
In radio applications, it is common to have an external AGC at the studio
side of a studio-to-transmitter link to protect the link from overload.
Most of the processing structures in OPTIMOD-PC control level with a
preliminary AGC internal to OPTIMOD-PC. If you are using an external
AGC device (such as an Orban 6300 multipurpose audio processor or an-
other OPTIMOD-PC) in front of OPTIMOD-PC, set OPTIMOD-PC's internal
AGC to D
not "fight" each other and that they do not simultaneously increase gain
(resulting in increased noise).
If you are using an Orban 4000 Transmission Limiter, set the AGC to
E
NABLED
The Orban 4000 is a transmission system overload protection device; it is
normally operated below threshold. It is not designed to perform an AGC
or gain-riding function and it cannot substitute for the AGC function in
OPTIMOD-PC.
Temporarily set AGC to E
erence level alignment steps (below) will work correctly. After you have
finished with these steps, set the AGC parameter appropriately for your
installation.
D) Set the AGC R
[Pre-EQ} or [Post-EQ]
This control affects any output whose S
been assigned to P
equalizers are included or omitted from this audio feed from the AGC
output.
E) Set the P
ROCESSING
[Minimum], [30 fps], [29.97 fps], [25 fps], [24 fps], [24-57 ms]
OPTIMOD-PC can add time delay to make its input/output delay exactly
one frame, using a variety of different standards. The selections are
M
(depends on software version; typically between 14 and 24 ms),
INIMUM
24 milliseconds, 30 fps, 29.97 fps (NTSC color video), 25 fps (most PAL vid-
eo), and 24 fps (film).
You can also choose delay in one-millisecond intervals from 24 to 60 milli-
seconds by choosing the desired value from the bottom entries in the
drop-down list.
4. Set Digital Output properties. (optional)
[Skip to "Input Setup Procedure" on page 2-35 if you will not be using OPTIMOD-
PC's WAVE output or AES3 digital output.]
cutoff frequency parameter in the C
as appropriate for your installation.
MODE
. This is to ensure that the internal and external AGCs do
ISABLED
(so that the AGC function in OPTIMOD-PC continues to work).
NABLED
as appropriate for your installation.
O
OUTER
UTPUT
M
ROCESSOR
IXER
.
D
ELAY
ONFIGURATION
so that the Analog and Digital Input ref-
R
F
IGNAL
OUTE
ROM
AGC. The control determines if the
INSTALLATION
page).
drop-down has
2-23
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