Orban Optimod-PC 1101, Operating Manual

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3-24
OPERATION ORBAN MODEL 1101
artifacts and side effects. Once you have used
L
ESS
-M
ORE
, save your ed-
ited preset as a User Preset.
Do not be afraid to choose a preset other than the one named for your program-
ming if you believe this other preset has a more appropriate sound. Also, if you
want to fine-tune the frequency balance of the programming, feel free to use Basic
Modify and make small changes to the Bass, Mid EQ, and HF EQ controls. OPTIMOD-
PC lets you make changes in EQ (and stereo enhancement) without losing the ability
to use Less-More settings.
Of course, L
ESS
-M
ORE
is still available for the unedited preset if you want
to go back to it. There is no way you can erase or otherwise damage the
Factory Presets. So, feel free to experiment.
If a preset has “2B” or “2BAND” in its name, it will activate the Two-Band structure.
(The Protection presets are two-band as well.) Other presets use the Five-Band struc-
ture.
Protection and AGC Presets
AGC+[FLAT, 50
μ
s, 75
μ
s] LIMIT: These presets allow OPTIMOD-PC to serve as a
studio AGC, substituting for the AGC in an Optimod at a radio or television transmit-
ter and providing protection limiting for the STL that links the output of OPTIMOD-
PC to the input of the Optimod at the transmitter. See
Studio AGC on page 3-9.
Choose the preset that matches OPTIMOD-PC’s preemphasis setting, visible in the
C
ONFIGURATION
page of the I/O Mixer (see step 5 on page 2-25). This step explains
how to choose OPTIMOD-PC’s preemphasis setting to match your STL.
The
50
μ
S
and
75
μ
S
presets have been tuned so that the five-band compressor
serves only as a subtle high frequency limiter that uses bands 4 and 5 to perform a
few dB of fast gain reduction with program material having strong high frequency
content. Band 5 operates without stereo coupling. This way, HF limiting triggered by
high frequency energy in one audio channel will not modulate high frequencies in
the opposite channel.
The F
LAT
preset is tuned so that it does not normally trigger gain reduction in
OPTIMOD-PC’s five-band compressor — the Optimod at the transmitter should be
FACTORY PROGRAMMING PRESETS (PROTECTION; AGC)
Preset Names
Source Preset Normal Less-More
AGC+FLAT LIMIT AGC+FLAT LIMIT 5.0
AGC+50us LIMIT AGC+50us LIMIT 5.0
AGC+75us LIMIT AGC+75us LIMIT 5.0
LOOK-AHEAD LIMIT LOOK-AHEAD LIMIT 1.0
PROTECT CLASSICAL 2BAND 7.0
SOFT KNEE 2B SOFT KNEE 2B 5.0
SOFT KNEE 5B SOFT KNEE 5B 5.0
Table 3-1: Protection and AGC Presets