Studio Technologies 212 2006 - Manual (Page 14)

Issue 3, July 2006 Model 212 User Guide
Page 14 Studio Technologies, Inc.
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 which is located on the back
panel of the unit. The center pin of the jack
is the positive (+) connection. While the re-
quirement for the external source is nomi-
nally 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 sup-
ply’s DC output cable has been terminated
with a Switchcraft® S760K coaxial power
plug. This “locking” type of plug correctly
mates with the Model 212’s 24 Vdc input
jack. The locking feature is important, al-
lowing 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
reasons. 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 customized 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 ap-
propriate for many on-air applications in
English-speaking locations. But it’s expect-
ed 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 stan-
dard personal computer graphics program
and laser printed onto 3M CG3300 trans-
parency film. The desired button labels
can be cut out with a pair of scissors, fol-
lowing the printed guide lines that indicate
the required size.
The clear lens on top of each button cap
can be removed with a fingernail or small
screwdriver. Be certain not to scratch the
button if a screwdriver or other small tool
is used. The clear label can be removed
and replaced. The button cap is then
snapped back into the top of the button
housing using finger-pressure only. No
tool is required to replace the button cap.
If you need to make your own labels the
process is quite simple. Use a personal
computer to create the desired text. The
finished label size should be 0.625-inches
(15.8 mm) square. The completed artwork
can then be printed on transparency film
sheets using a laser or inkjet printer. These
sheets are readily available from most
office supply stores. A pair of scissors or
an X-ACTO® knife will complete the task.
Configuration
For the Model 212 to support the needs
of specific applications a number of op-
erating parameters must be configured.
These include microphone preamplifier
gain, phantom power on/off, headphone
cue source selection, headphone stereo/
mono mode, and a number of operating
modes. Two 8-position and one 12-posi-
tion DIP-type switch assemblies are used
to establish the desired configuration.