Orban OPTIMOD-FM 8600, Operating Manual

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OPTIMOD-FM DIGITAL OPERATION
3-71
D) Save the resulting preset as a second User Preset/
You may now program two GPI inputs to recall these two presets as desired. Recall
the first preset to force “music” mode and recall the second preset to force “speech”
mode. Of course, you can use any other means of recalling these presets including
Automation, your Optimod’s API, and PC Remote.
About the 8600’s HD / Digital Radio Processing
Except for the fact that models 8600HD and 8600FM both offer an analog channel
diversity delay, this section applies only to 8600 units, not 8600FM units. Model
8600FM is the same as model 8600 except that model 8600FM does not provide digi-
tal radio processing. Model 8600FM can be upgraded to an 8600 in the field by in-
stalling the plug-in CPU board contained in the 8600UPG/HD upgrade kit, which can
be purchased from your Orban dealer.
The 8600 HD (“HD Radio”) output is designed to feed streaming, netcasting, and
digital radio channels, which can be DAB, DAB+, DRM, or the iBiquity® HD Radio™
system (formerly known as “IBOC”—“In-Band On-Channel”) approved for use in
several countries including the United States .
The equalizer and five-band compressor/limiter in the HD processing chain have
their own sets of user-adjustable audio controls that are independent of the controls
in the FM analog transmission chain’s equalizer and five-band compressor/limiter.
This allows you to optimize the HD processing for the higher fidelity sound provided
by the digital channel while giving you the flexibility to process the analog channel
as you wish. The stereo enhancer, phase rotator, and 30 Hz highpass filter are com-
mon to the two processing chains and their controls, which affect both chains, ap-
pear only in the FM adjustment screens.
To facilitate matching the FM analog and HD signals to minimize analog/digital
crossfades in HD receivers, you can force the HD channel controls to track the FM
channel controls by setting the
FM

HD C
ONTROL
C
OUPLING
control to
FM

HD
.
When you have finished tuning a preset to optimize the sound of the analog chan-
nel, you can then set the
FM

HD C
ONTROL
C
OUPLING
control to
I
NDEPENDENT
and
tweak the HD processing as you wish. This control is located in the
HD L
IMITING
page
of
A
DVANCED
C
ONTROL
. You can also toggle this control via two buttons on the but-
ton bar in 8600 PC Remote. When
FM

HD C
ONTROL
C
OUPLING
is
I
NDEPENDENT
,
a third
button toggles PC Remote focus between corresponding FM and HD tabs. This al-
lows you to compare your FM and HD settings easily.
Setting the
FM

HD C
ONTROL
C
OUPLING
control to
I
NDEPENDENT
defeats the
L
ESS
-
M
ORE
control, so if you want to use
L
ESS
-M
ORE
, adjust it before you start to make
independent adjustments to the FM and HD chains.
If a given preset has certain HD and FM controls set differently, setting the
FM>HD
C
ONTROL
C
OUPLING
to
C
OUPLED
will immediately cause the HD controls to take the
same settings as their FM analog counterparts. If you again set FM>HD CONTROL
C
OUPLING
to
I
NDEPENDENT
, this will restore any edits you made to the HD controls be-
fore you set the
FM>HD C
ONTROL
C
OUPLING
back to
C
OUPLED
.