Orban OPTIMOD-FM 8600Si, Operating Manual

Page: 78 / 356

2-22
INSTALLATION ORBAN MODEL
13. Choose a processing preset.
[If you are setting up the 8600Si for use as a stand-alone stereo encoder, skip this
step.]
A) Turn the knob until your desired preset is visible in the lower line of the dis-
play.
B) Press the Recall Next button to put your desired preset on-air.
This step selects the processing to complement the program format of
your station.
After this step, you can always select a different processing preset, pro-
gram the 8600Si to automatically change presets on a time/date schedule,
use a GPI input to trigger preset changes, modify presets to customize
your sound, and store these presets as User Presets.
Preset names are just suggestions . Feel free to audition different presets
and to choose the one whose sound you prefer. This preset may have a
very different name than the name of your format. This is OK.
You can easily modify a preset later with the 8600Si’s one-knob
L
ESS
-
M
ORE
feature. Refer to Section 3.
C) If you are using the digital radio processor’s BS.1770 Safety Limiter (step 12 on
page 2-35) you must set your chosen processing preset’s
HD F
INAL
L
IMITER
D
RIVE
to create the appropriate amount of gain reduction in the BS.1770
Safety Limiter. Then save the result as a User Preset. We recommend allowing
the BS.1770 Safety Limiter to produce no more than 3 dB of gain reduction.
BS.1770-3 is an imperfect metric. It has been established by listening tests
that BS.1770-3 can over-indicate loudness by 3 dB or more when the pro-
gram material has an unusually low peak-to-RMS ratio because of pro-
duction techniques, dynamic compression, etc. Whenever the BS.1770
meter would otherwise read above 0 LU, the BS.1770 Safety Limiter pro-
duces gain reduction that is the inverse of the BS.1770 meter’s reading.
Hence, the Safety Limiter can cause such material to be unnaturally quiet
sounding compared to speech or other program material with higher
peak-to-RMS ratios, so we recommend using as little gain reduction as
possible in the BS.1770 Safety Limiter. We believe that the Optimod pro-
cessing sounds most natural with no BS.1770 limiting at all, so you should
only use it if government regulations in your country require it.
D) If you are using the analog FM processing chain’s BS.1770 Safety Limiter
and/or its MPX Power Controller, you must adjust the
M
ULTIPLEX
P
OWER
O
FFSET
control to obtain an appropriate amount of gain reduction. See step 13 on
page 2-36.
Congratulations! You are now on the air with your initial sound. Feel free to
read the material in Section 3 of this manual, which describes the various presets
and how you can customize them to achieve your desired signature sound.
14. Complete Station ID (optional).
The Station ID is an optional setting that you can provide to associate the 8600Si
with the station providing the program material (e.g., “Z-100”). The name can be