Orban OPTIMOD-FM 8600Si, Operating Manual

Page: 86 / 356

2-30
INSTALLATION ORBAN MODEL
If you have to reduce the setting of the composite level ( C
OMP
1 LV or
C
OMP
2 LV) control to accommodate overshoots in the transmission path
following the 8600Si (including the transmitter), you may have to in-
crease the setting of the
P
ILOT
L
EVEL
so that the pilot is still at 9% mod-
ulation.
C) If your country enforces the ITU-412 multiplex power standard, set
ITU412
to
O
N
.
See step 1 on page 2-23.
D) If you are using the 8600Si’s pilot reference output to drive a subcarrier gen-
erator, set the
19
K
R
EF
control to the phase relationship between the 19 kHz
reference and the 8600Si’s pilot tone required by your subcarrier generator. In
most cases, this will be 0 degrees.
E) Press the Next button. If you need to apply the 8600Si’s diversity delay to the
composite outputs, set
D
VRSTY
D
LY to
I
N . Otherwise, set it to
O
UT .
It is not possible to apply the delay to only one of the two composite
outputs.
F) If you are using the diversity delay, set its value using the Setup >
D
VRSTY
D
LY
T
RIM control. The control sets the delay applied to the composite, analog, and
digital outputs when these outputs have been configured to receive delay.
While it is possible to activate or defeat the diversity delay independently
for the analog output, digital output, and composite outputs, it is not
possible to apply different amounts of delay to different outputs.
G) Be sure that
M
ODE is set to
S
TEREO and
X
TALK
T
EST is set to
O
PERATE
.
(You may
need to use the
Next
button to see them. Reset these parameters if necessary.
H) Using the
C
OMP
1 L
V
and
C
OMP
2 L
VL
controls, adjust the level for each compos-
ite output to produce 100% modulation of the FM carrier on modulation
peaks.
Alternately, you can use the 8600Si’s built-in calibration tone oscillator.
To do this:
a) Navigate to
Setup
> T
EST
.
b) Set the
M
ODE to
T
ONE .
c) Set
T
ONE
F
REQ to
100 H
Z .
d) Set
T
ONE
L
VL to 91%. (This assumes you are using 9% pilot injection, in
which case the peak level at the composite output is now the same as the
maximum peak level under program conditions.)
e) Press the Next key.
f) Set
T
ONE
C
HAN to
L+R
.
g) Verify that
P
ILOT
is
O
N
.
h) Adjust the relevant output level control so that your peak modulation is
100%.
i) When you have finished with the tone, set the
M
ODE to
O
PERATE .