Studio Technologies 212 2013 - Manual (Page 7)

Model 212 User Guide Issue 5, May 2013
Studio Technologies, Inc. Page 7
audio assigned to digital channel 2. The
composite digital audio signal is routed
to two physical interfaces. One output is
AES3id compliant (unbalanced, 75 ohms)
with a BNC connector for interfacing.
This professional interface is transformer-
coupled and capable of driving long
broadcast cable runs.
The digital audio output signal is also
routed to a unique bidirectional digital
interface. Similar to AES3id, it uses a
BNC connector and supports two chan-
nels of audio in each direction over a
single 75 ohm cable. The bidirectional
audio interface will find use in specialized
applications, including direct integration
with panel ports on Riedel® intercom
systems. Note that audio signals received
from the bidirectional interface are
described in the Cue Sources section
of this document.
For enhanced flexibility, the Model 212
includes the resources to support a third
digital output. Circuitry, located on the
printed circuit board assembly, creates an
AES3 compliant, 110 ohm nominal, trans-
former-balanced digital output. Gaining
access to this output simply requires add-
ing a 3-pin male XLR connector to one of
the two spare connector locations on the
Model 212’s back panel. Connector kits,
available from Studio Technologies, make
this a simple task.
The Model 212 isn’t limited for use in “on-
air” applications. A special feature can be
enabled, placing the unit in a “production”
mode. When this mode is active enabling
the talkback audio channel will no longer
force the main audio channel to mute.
This allows the main audio channel to be
used as a second talkback output. In this
configuration the unit can be even more
powerful when used in a live event applica-
tion, such as serving as a master console
for a production director.
By installing optional connectors or mod-
ules analog line-level versions of the main
and talkback output signals are available.
These “click-free” outputs can be useful in
applications where both digital and analog
signals are required.
User Controls and Status
Indicators
Two pushbutton switches, three LED in-
dicators, and two rotary controls provide
the user with a clear, easy-to-use interface.
One pushbutton switch controls the status
of the main audio channel. This is the audio
signal intended for on-air, announcement,
or other primary uses. Two LEDs display
the on/off status of the main audio channel.
A second pushbutton switch controls the
status of the talkback audio channel. This
is the audio signal used to communicate
with producers, directors, spotters, or other
behind-the-scenes production personnel. A
status LED is associated with the talkback
button. Two rotary controls allow the user
to adjust the level of the stereo headphone
output.
Operational Flexibility
Much of the Model 212’s unique capabili-
ties derive from the ability to configure the
on/off control of the main and talkback
audio channels. To meet the needs of the
many specific broadcast and production
applications, a variety of button operat-
ing modes are available. The main button,
located on the left side of the front panel,
can be selected to operate from among
four modes. In the “push-to-mute” mode
the button performs a momentary mute