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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.
4.1))
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 Prooram Tests below.
2: SINGLE CHASSIS
In a mono installation, do not parallel the left and right inputs until the procedure
ALIGNMENT
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:
1)
Stereo
Or
Mono
Installation:
Adjust
the
operating
controls
on
the
Main
Chassis as follows:
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
8182A, 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 lkHz, and its output level to produce "OdB" + 3cB 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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