6
MODIIC STEREO PROCESSOR
NOISE REDUCTION CARDS:
MD2Bx374
The SMART noise reduction cards provide noise
reduction for decoding Dolby type A stereo prints and
Spectral Recording (SR) encoded prints. The noise
reduction circuitry is automatically switched to the
proper mode when selected by the format switches on
the front of the processor. There are four trimpots and
two test points on each NR card. These are for factory
use only. Do not attempt to adjust these trimpots or
use the test points.
MATRIX CARD:
MOD4x317
This is the heart of the stereo conversion process. The
Wide Trac Deluxe Matrix card takes the signal from
the preamp and noise reduction circuits and converts
the two channel soundtrack into the four channels
required for normal stereo mode.
There is a surround null adjustment trimpot on the
Matrix Card which the installer can adjust to mini-
mize surround channel crosstalk without disturbing
the input signal calibration settings of the preamplifier
and noise reduction circuits.
OPTIONAL 1/3 OCTAVE EQUALIZER CARDS:
MOD4x320
Three one third octave room tuning equalizers can be specially ordered or added
later for the front stage speakers (Left, Center and Right). Each adjustable frequency
band in the stage EQs may be cut or boost ± 10 dB. A +6 dB gain adjustment is also on
each card. For overall unity gain, leave the gain pot in the CCW position. For unity
gain on each of the frequency band adjustments, leave the pot in the mid position. All
pots are the single turn type.
ONE OCTAVE EQUALIZER CARDS:
MOD4x324
This card is the standard EQ for the Stage Channels and the Left and Right Surround
Channels. There is no gain adjustment pot on the one octave EQ card. For the stage
channels, only the top eight trimpots are stuffed and used on each EQ card. For the
surround channels, one 1-octave EQ card is configured as a dual channel card. The
top eight trimpots are for Left Surround, and the bottom eight trimpots are for Right
Surround (see diagram).
1/3 Octave EQ
1 Octave EQ
