Orban OPTIMOD-FM 8700, Operating Manual

Page: 86 / 390

2-24
INSTALLATION ORBAN MODEL 8700i
For upper case letters, first Locate to the S
HIFT
key and then press Enter .
D) When finished entering your name, highlight S
AVE
and press Enter .
11. Complete Quick Setup.
A) Locate to the Finished screen (
S
YSTEM
S
ETUP
> Q
UICK
S
ETUP
10
).
B) Press
Escape
once to return to the System Setup screen, or twice to display the
Meters screen. Alternatively, press the control knob to display the pop-up
Menu.
Quick Setup is finished, unless your country is required to meet ITU-R 412-7 require-
ments (see next step)
Note that Quick Setup only guides you through setting up the processing for the
analog FM output. To set up the HD output, see About the 8700i’s HD / Digital Radio
Processing
on page 3-74 .
12. If you are required to meet the “multiplex power” limitations of ITU-R 412-7 in
your country, activate the 8700i’s ITU-R 412 controller.
[Skip this step if your country does not enforce ITU-R 412. At the time of this
writing, it is only enforced in certain European countries.]
A) Navigate to the I
NPUT
/
OUTPUT
> U
TILITIES
screen.
a) Press the control knob to display the pop-up Menu.
b) Turn the knob to highlight
I
NPUT
/
OUTPUT
and press the knob.
c) Locate to the I
NPUT
/
OUTPUT
> U
TILITIES
screen.
B) Set the M
ULTIPLEX
P
OWER
T
HRESHOLD
to “0.0 dB.”
If your transmission system introduces overshoot in the signal path after
the 8700i (including the transmitter), instead set the
M
ULTIPLEX
P
OWER
T
HRESHOLD
so that it equals the amount of peak overshoot (in dB) in the
transmission system. If you do not do this, the 8700i’s ITU-R 412 controller
will set the average multiplex power too low.
The easiest way to measure system overshoot is to turn the multiplex
power controller off temporarily. Then set the 8700i’s output level, using
its built-in 400Hz reference tone, so that the transmitter produces

75
kHz deviation. Finally, play program material with lots of high frequency
energy and bass transients (like bright rock music with heavy kick drum)
and observe the peak deviation produced by the program material. The
overshoot is the amount (in dB) by which the deviation with program
material exceeds

75 kHz deviation.
If your country does not enforce ITU-R 412, the M
ULTIPLEX
P
OWER
T
HRESHOLD
should be set to OFF .
Because the multiplex power controller sometimes uses the output of the
8700i’s stereo encoder as its reference, set the
C
OMPOSITE
L
IMIT
D
RIVE
con-
trol (page 3-46) to O
FF
If you are using the 8700i’s analog or digital out-
put (not its composite output) to drive the transmission system.