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3: PROGRAM
From
this point on,
the procedure
is
identical for single- and
dual- chassis
units.
TESTS
" OPTIMOD-TV
INPUT"
means
the
input
of
the
Accessory
Chassis
in
dual- chassis
systems, and the main input in single- chassis systems.
These
listening
tests
are
made
with
OPTIMOD-TV
set
up
according
to
our
Recommended Initial Control Settings in
Fig.
4-5.
They
are
intended
to
detect
obvious problems with audio quality which must he resolved before final adjustments
are
made.
Once
initial
listening
tests
are
passed,
you
can
proceed
to
adjust
OPTIMOD-TV setup controls according to subjective requirements.
These
instructions apply
to
either a stereo or mono
installation
except as noted.
a)
Adjust OPTIMOD-TV controls according to Fig. 4-5. Do not adjust the INPUT
ATTEN
or OUTPUT ATTEN controls at this
time. If you have a dual- chassis
system, DO NOT READJUST THE MAIN CHASSIS
INPUT ATTEN CONTROLS
UNDER ANY CIRCUMSTANCES!
•
•
•
OFF
b)
RELEASE
SHAPE
LOUDNESS
CONTROL
,
0
RELEASE TIME
BLOW
INPUT ATTENUATOR
And
EXP
LIN
PROOF
0
OPERA
E
OPERATE
ar
e
COMP
LIMITER
PROOF
CLIPPING
2
H- F LIMITING
•
LESS
(
/
IVIORE
O
FAST
4
3
2
10
O
INDEPENDENT
4
2
O
LO
5
10
4
5
8
7
S
BASS COUPLING
9
VVIOEBAND
e
GATE THRESHOLD
•
•
LEFT
RIGHT
OUTPUT
ATTENUATOR
Fig. 4-5: RECOMMENDED INITIAL CONTROL SETTINGS
Drive OPTIMOD-TV with typical audio at your usual operating level. Set your
console
in
MONO
mode,
such
that
both
channels
are
putting
out
identical
levels. Peak the console VU meters at OVU.
c)
Adjust the OPTIMOD-TV INPUT ATTEN controls ( in a dual- chassis installation,
on the Accessory Chassis) to " 0". Advance the LEFT INPUT ATTEN until the
TOTAL MASTER G/R meter reads approximately " OdB" + 3d3.
Stereo Installation Only: Observe the L- R meter on your stereo
monitor and
advance
the
OPTIMOD-TV
RIGHT
INPUT
ATTEN
until
the
meter
nulls.
Mono
Installation
Only: (NOTE:
The
output
amplifiers
must
be
strapped
in
L/R
mode.) Either
load
both
outputs with
equal
impedances,
or
temporarily
disconnect both outputs from the system.
Connect a sensitive AC
voltmeter
between the OPTIMOD-TV (+) LEFT OUTPUT and (+) RIGHT OUTPUT. Advance
the
OPTIMOD-TV RIGHT INPUT ATTEN until the meter nulls. Reconnect the
outputs to the system as necessary.
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