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Model 750 User Guide Issue 3, May 1997
Studio Technologies, Inc. Page 13
Model 750
Even if there are no immediate plans
to connect the AUX audio outputs to
external devices, it is recommended that
they be terminated on patch points. In this
manner they will be accessible for those
one-in-a-million situations that seem to
arise far too frequently!
Configurable Outputs
Each of the four configurable outputs is
electronically balanced, has a nominal
level of +4dBu, and is capable of driving
balanced or unbalanced loads of 600
ohms or greater. The outputs are intended
to be used only within the vehicle. DIP
switches are associated with each
configurable output. Details on using
these switches can be found in the Con-
figuration section of this guide.
Each of the configurable outputs is acces-
sible via a ¼-inch 3-conductor phone jack.
Prepare the mating connectors (plugs) so
that tip is signal high (+ or hot), ring is low
( or cold), and sleeve is shield. To con-
nect to an unbalanced load connect the
tip to high (+ or hot), and both the ring
and sleeve to shield.
It is highly recommended that the config-
urable outputs be routed via the patch
bay. Or, if there are no immediate needs
for these outputs, be certain to terminate
them on the patch bay for future use.
Sometime, somewhere, they will get used.
Setup Direct Output
Direct access to the setup sections voice
and tone signals is provided by means of
a stereo line-level output. As one of the
unique features of the Model 750, it should
definitely be utilized! This output is in-
tended to be connected to the audio input
associated with the video/audio switchers
Main Output 3
Main Output 3 has been optimized for
connection to devices located external
to the vehicle. This ruggedized, trans-
former-coupled stereo output is select-
able, using a front-panel button, for
microphone or line level. It is recom-
mended that Main Output 3 be wired, via
points on the patch bay, to the vehicles
input/output connector panel. Two 3-pin
male XLR-type connectors are used for
interconnection. Prepare the mating con-
nectors (females) so that pin 2 is high
(+ or hot), pin 3 is low ( or cold), and pin
1 is shield.
Main Output 3 was specifically designed
to provide a fully-isolated output with good
sonic performance. It was NOT designed
to drive full level into 600 ohm loads! While
a 600 ohm load can be connected without
damage, a 2dB level drop should be
expected. Used with 2k ohm or greater
loads, Main Output 3 will provide its full
specified performance.
AUX Output
A stereo output is provided to give access
to the Model 750s AUX audio bus. It is
intended that the AUX audio output will be
connected to devices within the vehicle.
The electronically-balanced, line-level
outputs have a nominal level of +4dBu,
and are capable of driving balanced or
unbalanced loads of 600 ohms or greater.
Two ¼-inch 3-conductor phone jacks
used for interconnection. Prepare the
mating connectors (plugs) so that tip
is signal high (+ or hot), ring is low ( or
cold), and sleeve is shield. To connect to
an unbalanced load connect the tip to
high (+ or hot), and both the ring and
sleeve to shield.