Orban OPTIMOD-PC 1100, Руководство по эксплуатации

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3-18
OPERATION ORBAN MODEL 1100
tomize your sound using the information in the Protection Limiter, Two-Band and
Five-Band sections that follow.
Each factory preset has full
L
ESS
-M
ORE
capability. The table shows the presets, in-
cluding the source presets from which they were taken and the nominal L
ESS
-M
ORE
setting of each preset. Some of the Five-Band presets appear several times under
different names because we felt that these presets were appropriate for more than
one format; these can be identified by a shared source preset name.
Important! If you are dissatisfied with the sound available from the fac-
tory presets, please understand that each named preset is actually 19 pre-
sets that can be accessed via the
L
ESS
-M
ORE
control. Try using this control
to trade off the amount of dynamic range reduction against processing
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] LIMITER: 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 3-8.
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 2-24). 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
the processor that performs this multiband compression.
All AGC presets use the look-ahead limiter to prevent overloading the STL on peaks.
Compared to
F
LAT
, the 50
µ
S
and 75
µ
S
presets progressively reduce the drive level