Orban OPTIMOD 6200, Operating Manual

Page: 69 / 195

OPTIMOD INSTALLATION
2-27
The
AI REF VU
and
AI REF PPM
settings track each other with an offset of
8dB. 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 6200’s gain reduction range to the level to
which your studio operators peak their program material on the studio me-
ters. This assures that the 6200’s processing presets will operate in their pre-
ferred 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, we are calibrating to the normal indication of the stu-
dio meters; this is quite different from the actual peak level or actual average
or RMS level.
If you know the reference VU or PPM level that will be presented to the
6200, set the
AI REF
level to this level, but do verify it with the steps shown
directly below.
B)
Press the
Recall
button.
C)
Turn the control knob until you see
next: GENERAL–OPEN
.
D) Press the RECALL NEXT soft key.
E) Calibrate using Tone — feed a tone at your reference level to the 6200.
[Skip this step if you are using Program material to calibrate the 6200 to
your standard studio level. Skip to step (F).]
If you are not using a studio level controller, feed a tone through your con-
sole at the level to which you normally peak program material (typically
0VU if your console uses VU meters).
If you are using an Orban 4000 Transmission Limiter, press its two
TEST
buttons. Feed a tone through your console at the level to which you normally
peak program material (typically 0VU if your console uses VU meters).
If you are using a studio level controller that performs an AGC function,
such as an Orban 8200ST OPTIMOD-Studio or 464A, adjust it for normal
operation.
a) Verify ST CHASSIS is set to no .
Refer to step 3 on page 2-23 above.
b)
Hold down the
AI REF
soft key and use the 6200’s front panel control knob to
adjust for 10.0dB on the 6200’s AGC meter.
This control has no effect on the AES/EBU digital input.
c) When finished, reset ST CHASSIS to yes , if required (e.g., if that was its setting
prior to setting
AI REF
level).
d)
Skip to step 4.