Filter
Top Products
Model 233 User Guide Issue 1, September 2007
Studio Technologies, Inc. Page 39
LED Colors
As previously described, two LED indica-
tors are associated with the main output
and are located directly above the main
output pushbutton switch. The red LED,
located on the left, is lit whenever the
main output is muted. The green LED,
located on the right, is lit whenever the
main output is active. The thought pro-
cess behind the color choices was that
red would relate to the main output being
muted (“stop”) while green would relate
to the main output being active (“go”). It’s
possible that these color choices may not
meet the needs of all users and applica-
tions. For example, it’s reported that one
European broadcaster typically uses these
two colors in the opposite fashion. Their
choice is to have the red LED lit whenever
the main output is active, warning the tal-
ent that they are “on-air.” The green LED
is lit whenever the main output is muted,
indicating to the talent that it’s “safe” to
say whatever they wish, about whomever
they wish to say it about!
For consistency, the LED associated with
each talkback button was selected to be
green. They light whenever their associ-
ated talkback output is active. It’s possible
that some applications may benefit from
revising these LED colors too. While red
is certainly one possible choice, other col-
ors are also a possibility including amber,
orange, or blue—these days there are lots
of choices available. The only limitation
is the amount of current available to light
each LED. Using series resistors of no less
than 560 ohms will ensure correct Model
233 operation.
A qualified technician can easily revise the
LED colors to meet an application’s exact
needs. The process would begin by disas-
sembling the Model 233’s enclosure and
detaching the pushbutton/LED printed
circuit board assembly. The LEDs would
then be unsoldered, removed, and rein-
stalled (or replaced) in the desired loca-
tions. To control the LED current and set
the brightness, a resistor is electrically in
series with each LED. An 820 ohm, ¼-watt
resistor is associated with the red LED
while a 560 ohm, ¼-watt resistor is associ-
ated with each green LED. These resis-
tors would also have to be unsoldered,
removed, and reinstalled. Then the unit
would be reassembled and tested to con-
firm that the changes function as desired.
For additional information about chang-
ing the LED colors, please contact Studio
Technologies’ technical support.
Travel Case
For portable applications it may be desir-
able to store and transport each Model
233 in a protective case. After much travel
with prototype announcer console units,
Studio Technologies personnel learned
to appreciate the Pelican Model 1450
case. Purchased with the foam interior
option, it does an excellent job of holding
one Model 233, its associated 24 volt DC
power supply, and documentation. Some
applications may benefit from selecting a
larger case that would also hold a related
headset, cables, etc. A larger case could
also be selected that would hold multiple
Model 233 units. Pelican sells their prod-
ucts through a dealer network, many of
which can be located via a web search.
Additional Connectors
Three spare connector locations are
provided on the Model 233’s back panel.
From the factory they contain blank
plates that can be readily removed and
replaced with a variety of XLR-type con-
nectors. These spare connector locations