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PART 4:
Initial Setup Procedure
Instructions
are
provided
for
mono
installations,
and
for
stereo
installations
in
which
a BTSC ( United
States
standard)
stereo
generator
other
than
the
Orban
8182A/SG
is
used.
IF
THE
ORBAN
8182A/SG
BTSC
STEREO
GENERATOR
IS
USED, IGNORE ALL INSTRUCTIONS IN PART 4 OF THIS MANUAL
AND REFER
TO
PART 4 OF YOUR 8182A/SG OPERATING MANUAL INSTEAD. ( This provides
integrated
instructions
for
setup
and
adjustment
of
all
parts
of
the
system.)
If
the 8182A OPTIMOD-TV is used with a stereo standard other than BTSC ( such
as
the
systems
used
in
Japan
or
West
Germany),
set
percentage
modulation
by
adjusting
the
8182A's
LEFT
and
RIGHT
OUTPUT
ATTENUATORS
according
to
common-sense principles.
IMPORTANT
1.
The
stereo
setup
instructions below
will
only
work
if
the
external
stereo generator has already been set up and has been level- matched to
the exciter using
the
instructions provided by the
manufacturer of the
stereo generator.
2.
If
the Orban 8182A/SG Stereo Generator is
connected
to Accessory
Port # 1, the rear-panel Stereo Generator IN/OUT switch on the 8182A
must
be
IN.
Otherwise,
it
must
be
OUT
to
provide
signal
continuity.
In
normal
mono operation, the left and right inputs must be driven in parallel ( or
by
identical audio from redundant sources); the output may be
taken from either
the left or the right channel.
When
driven with a lkHz
tone, the Loudness Controller causes no additional gain
reduction.
Therefore,
it
may
be
in
either
OPERATE
or
DEFEAT
mode
without
affecting the accuracy of the procedure described below.
If
you
have
a single- chassis
OPTIMOD-TV,
skip
to
H.
Single-Chassis
Alignment
below.
If you have a dual- chassis OPTIMOD-TV, you must first align the gain of your STL
and the Main ( Transmitter) Chassis to a standard to assure that both STL and Main
Chassis
are
driven
at
correct
levels
and
are
properly
gain- matched. [The
dual-
chassis configuration is described in Part 1 (Introduction).]
1: DUAL CHASSIS
Before
beginning the dual- chassis alignment, remove the # 2, # 3, # 4, and # 5 cards
ALIGNMENT
from
the Main Chassis, and substitute the # 3TX and # 4TX cards per instructions
supplied
with
the
Accessory
Chassis ( 8182A/ST).
These
instructions
also
describe
installation of the # 2, # 3, # 4, and # 5 Cards in the Accessory Chassis.
In
a mono
installation,
the
procedure
depends
on
whether
a redundant
STL
is
available.
If
a redundant
STL
is
available,
treat
the
two
STL's
as "LEFT"
and
"RIGHT" and follow the stereo instructions. If only one STL is available, follow the
mono
instructions.
Do
not
parallel
the
left
and
right
inputs
until
the
procedure
instructs you to do so.
In
a stereo installation, the procedure is repeated twice, once for the left channel
and once for the right.
4-1
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