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2:
SINGLE
CHASSIS
ALIGNMENT
Connect
the
LEFT
Main
Chassis
output
to
the
aural
exciter.
Turn
on
the
aural
transmitter,
and advance
the
Main
Chassis
LEFT
OUTPUT ATTEN
until
your Aural Modulation Monitor
reads
60%
modulation.
Turn
off
the aural transmitter,
and connect
its
input
to
the
Main
Chassis'
RIGHT
OUTPUT.
Turn
on the
aural transmitter,
and
advance
the
Main
Chassis
RIGHT OUTPUT ATTEN
until
your Aural Modulation
Monitor
reads
60%.
(See
the
NOTE
immediately
above.)
The L
SYSTEM OUT
and
R SYSTEM
OUT
meters
on the
Main
Chassis should
read
identically.
4.a)
Stereo
Installation
Only:
Connect
the
LEFT
and
RIGHT
program
lines
from
the
console
or
switcher
to
the
LEFT
and
RIGHT
inputs
of
the
Accessory
Chassis.
Proceed
to
Program
Tests below.
4.b)
Mono
Installation Only:
Connect
the
program
line
to
both
LEFT
and
RIGHT
Accessory
Chassis
inputs
in
parallel.
If
your
installation
is
fully
redundant, you
may
wish
to
connect
a
redundant
audio source
to
the
Accessory
Chassis
RIGHT INPUT
instead of
paralleling.
Be
sure that both
audio sources
are
at
the
same
level,
and
are in-phase.
Proceed
to
Proaram
Tests below.
In
a
mono
installation,
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.
There
are three steps:
Stereo
Or
Mono
Installation:
Chassis
as follows:
Adjust
the
operating
controls
Proof/Operate
Switches:
OPERATE
L
and
R
Input Attenuators:
0
Clipping:
+2
Release Time:
10
Bass Coupling:
10
Gate
Threshold:
0
HF
Limiting:
10
Output
Attenuators:
fully
counterclockwise
2. a)
Stereo
Installation
Only:
[NOTE: The
instructions
immediately below
apply
only
if
the
output
amplifiers
are
strapped
in
L/R mode
--
see
(4)
in
Initialization
Options
in
Part
3
(Installation).
If
the
output
amplifiers
are
strapped
in
L+R/L-R mode
and
tone
is
applied
to
only
one
input
channel
of
the
8
18
2
A,
first
set
L+R
modulation
to
30%
by
adjusting
the
L+R
OUTPUT
ATTEN.
Then
optimize
separation by observing the
undriven channel on your
stereo
monitor and
adjusting
the
L-R
OUTPUT ATTEN
until
the
undriven
channel
nulls.]
Connect
an
audio
oscillator
to
the
LEFT INPUT
of
OPTIMOD-TV.
Set
its
frequency
to
1kHz,
and
its
output
level to
produce "OdB"
+3dB
as indicated
on
the
TOTAL MASTER
G/R
meter. Turn
on the aural transmitter,
and advance
the
LEFT
OUTPUT ATTEN
until
your
TV
stereo
monitor
indicates
a
L+R
modulation
of
30%. Record
the
reading
of
the
L
SYSTEM OUT
meter.
4-4
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