Orban OPTIMOD-FM 8700, Руководство по эксплуатации

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INSTALLATION ORBAN MODEL 8700i
f) Adjust the 8700i’s C
LIP
L
EVEL
so that the program peaks indicate approxi-
mately –2 dB on the meter on the screen.
g) Return the 464A to the normal settings.
E) Calibrate with an Orban 1100 or 1101/1101e Optimod-PC:
[Skip this step if you are calibrating in another manner.]
Refer to the Optimod-PC manual for instructions on setting it up as an
external AGC. You will usually use one of its three AGC presets.
Optimod-PC does not have a built-in 100% tone generator. The easiest
way to set the 8700i input peak clipping level is to recall a “loud” preset
in Optimod-PC that will produce substantial amounts of gain reduction in
Optimod-PC’s look-ahead limiter. This will produce frequent peaks at the
maximum peak level at OPTIMOD-PC’s output.
a) If you have customized your normal AGC preset in Optimod-PC, save it as a
User Preset.
b) Apply program material at normal level to Optimod-PC’s input.
c) Recall the IMPACT preset and verify that the Optimod-PC L
IMITER
meters
indicate substantial gain reduction.
d) Adjust the 8700i’s C
LIP
L
EVEL
so that the program peaks indicate approxi-
mately –2 dB on the meter on the screen.
e) Recall your regular AGC preset in Optimod-PC.
5. Adjust the Analog Input’s Reference Level.
[

9 dBu to +13 dBu (VU), or –2 to +20 dBu (PPM)] in 0.5 dB steps]
The R
EFERENCE
L
EVEL
VU and PPM (Peak) settings track each other with an offset
of 8 dB. This compensates for the typical indications with program material of a
VU meter versus the higher indications on a PPM.
This step sets the center of the 8700i’s gain reduction range to the level to which
your studio operators peak their program material on the studio meters. This en-
sures that the 8700i’s processing presets will operate in their preferred range.
You may adjust this level with a standard reference / line-up level tone from your
studio or with program material.
Note that in this step, you are calibrating to the normal indication of the studio
meters; this is quite different from the actual peak level.
If you know the reference VU or PPM level that the 8700i will receive, set the
R
EFERENCE
L
EVEL
to this level, but do verify it with the steps shown directly be-
low.
A) From the pop-up Menu, select the P
RESETS
screen.
B) Highlight the
R
OCK
-M
EDIUM
preset.
C) Press the
Enter
button to select the preset.