Studio Technologies 770 - Manual (Page 11)

Model 770 User Guide Issue 1, October 1997
Studio Technologies, Inc. Page 11
Model 770
levels. Fanatics for addressing the details,
Studio Technologies has even eliminated
the issue of burned-out meter-scale illumi-
nation by implementing a solid-state, LED-
based lighting scheme.
A 1kHz sine-wave signal is provided for
alignment and reference use. While the
1kHz tone can be assigned to the main
and AUX output buses, a direct line-level
output is also provided. This allows the
1kHz tone to be used as a setup or test
signal without interfering with normal
operation of the main and AUX audio
buses.
Talk Back
The Model 770 includes a “talk back”
function. A push-button switch allows
audio from the gooseneck microphone
to be routed to the main and AUX outputs.
Mounting, Connectors, and Mains
Power
While the Model 770 is loaded with fea-
tures, it only requires two spaces in a
standard 19-inch rack. XLR-type and
¼-inch 3-conductor audio connectors are
used for audio interconnection. A standard
modular (RJ11) telephone jack is used by
the telco interface. Mains power is factory
configured for 100, 120, or 220/240V,
50/60Hz.
Installation
In this section you will be installing the
Model 770 Audio Mixer/IFB Controller in
an equipment rack. Input and output
connections for the mixer, IFB, and moni-
tor sections will be made using the Model
770’s multitude of jacks. AC mains power
will then be connected.
During normal operation, no access to the
back panel of the Model 770 is required.
However, there are six trim potentiometers
that may need to be adjusted prior to the
Model 770 going into service. Refer to the
Configuration section of this guide for
details.
Locating the Unit
Physical access and mechanical noise
are the primary factors when choosing a
mounting location. By its very nature as
an audio mixer and IFB controller, an
operator will need easy access to all the
controls and the gooseneck microphone.
The gooseneck microphone is located on
the left side of the front panel so be careful
that there isn’t a cooling fan blowing
directly onto it. Also, a good sight line to
the VU meter, located on the right side
of the front panel, is important.
As a device that contains high gain audio
stages, hum and noise pickup is possible
through the chassis and associated ca-
bling. Locating the unit away from devices
that radiate strong AC fields is an excellent
idea.
While not likely, it is possible that the
Model 770’s toroidal power transformer
may radiate energy into adjacent equip-
ment. It is located at the right, bottom rear
corner of the unit, and may need to be
physically isolated from sensitive equip-
ment, especially videotape recorders.
Mounting
The Model 770 is intended for mounting in
a standard 19-inch equipment rack, requir-
ing 3.5 inches vertically (two standard rack
spaces). It weights approximately 13.5
pounds (6.1kg), and operates on mains
power of 100, 120, or 200/240V, 50/60Hz.