5
INSTALLATION & OPERATION
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 minimize sur-
round channel crosstalk without disturbing the input signal
calibration settings of the preamplifier and noise reduction
circuits.
1/3 OCTAVE EQUALIZER CARDS:
MOD4X320
Three one third octave room tuning equalizers are used for the
front stage speakers. Each adjustable frequency band in the
front 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 fre-
quency band adjustments, leave the pot in the mid position. All
pots are the single turn type.
DUAL CHANNEL ONE OCTAVE EQUALIZER CARD:
MOD4X324
This card is for the Left and Right Surround Channels. Circuitry
and operation is similar to the stage channel EQs except that it
uses one octave EQs and there is no gain adjustment pot. The
top eight trimpots are for Left Surround, and the bottom eight
are for Right Surround.
DIGITAL TIME DELAY/SURROUND GENERATOR
CARD:
MOD5X325
The digital time delay portion of the MOD V system is con-
tained on this card, along with the optional Stereo
Generator Surround Module. The surround channel passes
through the time delay whenever any Stereo-Optical format
or Stereo Generator format is selected by the operator.
35mm magnetic, 70mm magnetic, Music or digital inputs
are NOT time delayed. There is a rotary switch on this card
that is used to set the time delay setting. The rotary switch
has 16 positions: 0-9 & A-F. Position 0 is 10 milliseconds
of delay, which is the minimum delay setting. Each position
clockwise adds 10 milliseconds of delay for a maximum
setting of 160 milliseconds (position F).
Note: Earlier units used an analog time delay card. This
card had dip switches that set the time delay. All switches
down (on position) produced a minimum delay of 35 mil-
liseconds. Each dip switch flipped up (off position) added
10 milliseconds of additional delay.
1/3 Octave EQ
One Octave EQ
