Orban OPTIMOD 6200, Operating Manual

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2-26
INSTALLATION ORBAN Model 6200
[Skip this step if you are calibrating in another manner.]
a)
Turn on the Studio Level Control System’s 100% Calibration Tone.
On the Orban 4000 Transmission Limiter, press both of the 4000’s front
panel
TONE buttons.
b)
Adjust the output level of the Studio Level Control System for 100%
modulation of the STL.
c)
Adjust the 6200’s
AI CLIP
to indicate –2dB on the input meters.
D)
Calibrate with an Orban 464A Co-Operator:
[Skip this step if you are calibrating in another manner.]
The 464A does not have a built-in 100% tone. The easiest way to set the
6200 input peak clipping level is to temporarily re-adjust the 464A to pro-
duce clipped waveforms on program material to give a clear indication of
peak clipping level.
a)
Set both channels of the 464A controls as follows:
METER CAL 0
HF LIMIT PRE-EMPHASIS set to pre-emphasis of your
STL; if no pre-emphasis,
set to 25
µ
s
OUTPUT ATTEN 0
INPUT ATTEN 10
GATE THRESH 0
RELEASE TIME 0
REL SHAPE SOFT
LEVEL OFF
COMPR OFF
HF LIMIT
OPERATE
SYSTEM OPERATE
POWER ON
MODE DUAL
b)
Play program material from your studio.
c)
Adjust the 464A’s
METER CAL
controls so that the 0dB segment on the 464A’s
PEAK OUTPUT LEVEL meter just illuminates on program peaks.
d)
Adjust the 464A’s
OUTPUT ATTEN
controls to drive the STL to 100%
modulation.
e) Adjust the 6200’s AI CLIP so that the program peaks indicate approximately
–2dB on the meter on the screen.
f)
Return the 464A to the normal settings.
3. Adjust Analog Input Calibration.
A) Adjust AI REF (Analog Input Reference) level.
[
−
9dBu to +13dBu (VU), or –1 to +21dBu (PPM)] in 0.5dB steps