Orban OPTIMOD-FM 8500S, Operating Manual

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2-18
INSTALLATION ORBAN MODEL
Hold down the D
IGITAL
soft button and adjust the knob so that the AGC
meter indicates an average of 10 dB gain reduction.
The procedure does not apply to the 8500S’s stand-alone stereo encoder
mode. In this mode, the level indicated on the screen during this step is
the r.m.s. level (in dBFS) of a 50 Hz input tone that produces 100% peak
modulation at the 8500S’s composite output when the 8500S’s
C
OMPOSITE
L
IMITER
D
RIVE
control is set to
0
or
O
FF
.
10. Configure the analog outputs.
A) Set analog output feed.
a) Press the Next button.
b) Turn the knob to choose FM, FM+Delay, Monitor, or HD.
The HD selection will only be available if your unit is an 8500S/HD
B) Set analog output to be flat or pre-emphasized.
a) Press the
Next
button.
b) [Skip this step if you will not be using the analog left/right outputs.]
Turn the knob to choose
P
RE
-
E
(for pre-emphasis) or
F
LAT
.
If you will use the analog output to drive a stereo encoder,
P
RE
provides
the best performance because the stereo encoder that receives the ana-
log output does not have to restore the pre-emphasis. However, if you
cannot defeat the pre-emphasis in your stereo encoder, or if you will use
the analog output for monitoring, set the output
F
LAT
.
If you are sending the analog output of the 8500S through a digital link
that uses lossy compression (like MPEG, APT-X, or Dolby), set the output
F
LAT
.
Lossy codecs cannot handle pre-emphasized signals.
11. Configure the digital outputs
A) Assign sources to Digital Outputs #1 and #2.
The instructions in this step 11 assume that your unit is an 8500S/HD and
that you are using Digital Output #2 to drive your analog FM transmitter
and Digital Output #1 to drive the HD input of your transmission system.
a) Press the
Next
button.
b) Turn the knob to assign FM or FM+D
ELAY
as the source driving Digital
Ouput #2.
FM+D
ELAY
is used in HD Radio installations where the 8500S supplies the
diversity delay.
c) Press the
Next
button.
d) Turn the knob to assign
HD
as the source driving Digital Ouput #1.
If your unit is an 8500S/FM,
HD
will not be available as an option. In this
case, you may wish to configure Digital Output #1 as a second FM output
to drive a standby exciter (by choosing
FM or FM+D
ELAY
)
. In this case, you