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Issue 1, September 2007 Model 233 User Guide
Page 28 Studio Technologies, Inc.
of how they impact the Model 233’s
operation can lead to many interesting
and powerful uses.
Talkback to Intercom Functions
The last two switches in switch assembly
SW2 are used to configure the talkback
to intercom functions.
Talkback 1 to Intercom Function Mode
Switch SW2-11 configures whether the
talkback 1 button will allow talkback
audio to be sent to pin 2 of the intercom
interface.
• Talkback 2 to intercom interface pin 3:
In this mode the talkback 2 button will
control the routing of talkback audio to
pin 3 of the intercom interface. Pin 3 is
channel 2 of an RTS TW intercom sys-
tem. For a single-channel Clear-Com
intercom system pin 3 is channel 1.
Conclusion
Once the eighteen switches have been set
to the desired Model 233’s operating con-
figuration, it may be time to reattach the
security plate. The exception is if the trim
pots associated with the line inputs and
intercom sidetone (null) need to be adjust-
ed. Details are provided later in this user
guide. The plate attaches using the four
rubber bumpers. They should be hand-
tightened only; no tools are to be used.
Operation
At this point the desired input, output, and
power connections should have been
made. The button labels may have been
revised. After carefully reviewing the appli-
cation, the configuration switches should
have been set. Normal operation of the
Model 233 can now begin. The unit will
begin functioning as soon as a power
source is connected. As previously dis-
cussed, power for the Model 233 can be
provided by an intercom line or an exter-
nal source of 24 volt DC. It’s important to
highlight the fact that the Model 233 is an
active device. Audio signals will not be
Figure 21. Talkback 1 to intercom pin 2 settings
Figure 22. Talkback 2 to intercom pin 3 settings
Two modes are available:
• Disabled: In this mode the talkback 1
button will not allow talkback audio
to be sent to pin 2 of the intercom
interface.
• Talkback 1 to intercom interface pin 2:
In this mode the talkback 1 button will
control the routing of talkback audio to
pin 2 of the intercom interface. Pin 2 is
channel 1 of an RTS intercom system.
Talkback 2 to Intercom Function Mode
Switch SW3-12 configures whether the
talkback 2 button will allow talkback
audio to be sent to pin 3 of the intercom
interface.
Two modes are available:
• Disabled: In this mode the talkback 2
button will not allow talkback audio
to be sent to pin 3 of the intercom
interface.