Studio Technologies 212 2013 - Manual (Page 14)

Issue 5, May 2013 Model 212 User Guide
Page 14 Studio Technologies, Inc.
the bidirectional digital interface to be
active the appropriate configuration DIP
switches much be set.
The ability of the bidirectional digital inter-
face to send and receive digital audio sig-
nals over one cable makes interconnecting
the Model 212 with other equipment in-
credibly simple. For example, the bidirec-
tional digital interface is directly compatible
with panel ports on a Riedel Artist® digital
matrix intercom system. A single cable
is all that is required to interface an Artist
digital panel port with the Model 212.
Optional Analog Audio Inputs
While the Model 212’s headphone sources
were designed primarily to be supplied
using one of the digital audio inputs, it’s
also possible to connect one or two analog
line-level audio sources. Please refer to the
Technical Notes section of this user guide
for details.
Optional Analog Audio
Outputs
In most cases the Model 212 will be used
in applications where the main and talk-
back audio output signals are required to
be in the form of digital audio outputs. It’s
also possible that an application can ben-
efit from having analog live-level versions
of these signals. This is possible using
optional output modules or connectors.
Please refer to the Technical Notes section
of this user guide for details.
External Power Input
The Model 212 requires an external source
of 24 volt DC power for operation. It is con-
nected by way of a 2.1 x 5.5 mm coaxial
power jack that is located on the back
panel of the unit. The center pin of the
jack is the positive (+) connection. While
the requirement for the external source is
nominally 24 volts, correct operation will
take place with any source within the range
of 20 to 30 volts. A maximum current of 150
milliamperes at 24 volts DC is required.
Included with each Model 212 is a 24 volt
DC external power supply. The power
supply’s DC output cable has been termi-
nated with a Switchcraft® S760K coaxial
power plug. This “locking” type of plug cor-
rectly mates with the Model 212’s 24 Vdc
input jack. The locking feature is important,
allowing the external power source to be
securely attached to the Model 212.
Pushbutton Labeling
The two pushbutton switches used in the
Model 212 were selected for several rea-
sons. Foremost was the fact that they are
highly reliable, using gold-plated contacts
for long life in less-than-ideal environments.
A second reason was that applying cus-
tomized labels to the button caps would
be very simple. The labels, text printed on
clear material, are placed under the clear
caps on the top of the buttons.
From the factory the left button is labeled
COUGH and the right button is labeled
TALKBACK. This was selected to be appro-
priate for many on-air applications in Eng-
lish-speaking locations. But it’s expected
that these may need to be changed to meet
the needs of specific applications.
As a “head start” for some applications,
a clear sheet with a number of commonly
used button designations printed on it is
included in the shipping carton. These were
created at the factory using a standard
personal computer graphics program and
laser printed onto 3M CG3300 transparency
film. The desired button labels can be cut