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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
1kHz
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
n. 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
it
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
it
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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