MOD 7 STEREO PROCESSOR
12
Digital Player Connections
The MOD 7 has six inputs (Left, Center, Right, Left Sur-
round, Right Surround and Sub) via a female DB25 connec-
tor marked DIGITAL INTERFACE. The DIGITAL IN-
TERFACE inputs accept any high level multi-channel
source. The audio signals are processed through the
equalizers and master volume circuit before they appear at
the main OUTPUTS. If EX mode is selected, then the Circle
Surround matrix processes the left surround and right
surround channels to produce the rear and overhead
channels.
SMART has interconnection cables available to connect the
popular digital player systems to the MOD 7. Simply plug
the appropriate DB25 connector to the MOD 7 DIGITAL
INTERFACE port and the other DB25 connectors to the
audio and control ports on the digital player.
If you desire to make your own cables, here is the pinout
for the DB25 connector.
Digital Interface DB25 Pinout
Pin 1 Left
Pin 3 Center
Pin 5 Right
Pin 6 Left Surround
Pin 7 Right Surround
Pin 8 SubWoofer
Pin 9 Mono
Pin 10 Music
Pin 11 Stereo A
Pin 12 Digital
Pin 13 Stereo SR
Pin 14-25 Ground
Another application for the digital input is for external sync
sources. Sound interlock from a 35-mm reproducer or a
single 16-mm projector may be fed into the DIGITAL
INTERFACE and selected with the front panel DIGITAL
format switch.
Default Optical Selection
External digital decoders available on the market have a
function that instructs the processor to switch to an optical
format in the event that the digital decoder fails or loses
time code. When this happens, the digital decoder will
pulse the appropriate terminal (MONO, STEREO A,
STEREO SR, or MUSIC) to ground to alert the processor to
switch to the optical format. The information pertaining to
which format to default to is encoded in the digital
soundtracks on DTS prints. On Dolby Digital, the default is
SR.
Monitor Interface
The MONITOR INTERFACE Port is a male DB25 connec-
tor to which a booth monitor’s processor inputs can be
connected. The pinout is as follows:
Pin 5 Right Rear/Overhead
Pin 7 Left Rear
Pin 12 +15 VDC
Pin 13 -15 VDC
Pin 15 Subwoofer
Pin 17 Right Wall
Pin 19 Left Wall
Pin 21 Right
Pin 23 Center
Pin 25 Left
Pins 2, 4, 6, 8,
10, 16, 18, 20,
22, & 24 Ground
Output Connections
The main OUTPUTS are labeled LEFT, CENTER, RIGHT,
LEFT WALL, LEFT REAR, RIGHT REAR, RIGHT WALL,
and SUB. Shielded cable should be run between these
terminals and the next piece of equipment in the sound
system (equalizer, amplifer, etc.). Convenient GROUND
terminals are provided near the outputs.
Output Wiring for non-EX applications
If you are not using the EX feature, then wire all surround
amplifiers to the LEFT WALL and RIGHT WALL termi-
nals. Do not use the LEFT REAR and RIGHT REAR
terminals.
Output Wiring for EX applications
If you are using the EX feature, then wire the left wall and
right wall amplifiers to the LEFT WALL and RIGHT
WALL terminals. Wire the left rear and right rear amplifi-
ers to the LEFT REAR and RIGHT REAR terminals. Please
note: the CS/OS shunt must be in the CS position (see top
of Page 7 titled EX Power Up and Overhead Channel
Configuration)
Output Wiring for EX and Overhead Applications
If you are using the EX and overhead features, then wire
the left wall and right wall amplifiers to the LEFT WALL
and RIGHT WALL terminals. Wire the left rear and right
rear amplifiers to the LEFT REAR terminal. Wire the
overhead amplifier to the RIGHT REAR terminal. Please
note: the CS/OS shunt must be in the OS position (see top
of Page 7 titled EX Power Up and Overhead Channel
Configuration) Also SW1-2 on the matrix must be set to the
DOWN position.
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