Studio Technologies 230 2014 - Manual (Page 20)

Issue 9, November 2014 Model 230 User Guide
Page 20 Studio Technologies, Inc.
Headphone Source Selection
Switch assembly SW2 is used to config-
ure the source or sources that are routed
to the stereo headphone output. The six
headphone sources are IFB channel 1,
IFB channel 2, line input 1, line input 2,
intercom channel 1, and intercom channel
2. The IFB channels are provided by way
of the IFB input connector located on the
Model 230’s back panel.
The line inputs are connected using two
connectors also located on the back panel.
Associated with line inputs 1 and 2 are
level trim potentiometers. They are provid-
ed so that audio sources with a wide range
of nominal levels can be effectively used as
cue sources. Please refer to the Advanced
Operation section of this user guide for
details on using the trim pots.
Audio associated with intercom channels
1 and 2 is provided by way of the intercom
interface whose connector is also located
on the back panel. Two trim pots are as-
sociated with the intercom channels. They
allow adjustment of the user’s sidetone
level—the talkback audio signal that is
returned to a headphone output when a
talkback-to-intercom function is active.
Each of the available input sources can
be assigned to the headphone output’s
left channel, right channel, or both the left
and right channels. The Model 230’s cir-
cuitry allows any combination of source
assignments to be made. For example,
consider the situation where a single-chan-
nel intercom line, with audio present only
on pin 3, is connected. In this case it may
be desirable to assign this intercom audio
source to both the left and right channels.
This would entail setting switches SW2-6
and SW2-12 to their on positions. All other
switches would remain in their off positions.
Figure 6. Left and right channel headphone
source selection settings
A more complex application might have
a 2-channel IFB circuit connected to the
IFB input and a line-level audio signal from
a golf event “spotter” connected to line
input 1. In a case such as this, it would be
typical for IFB channel 1 to be assigned to
the headphone’s left channel, IFB channel
2 assigned to the right channel, and line
input 1 also assigned to the right channel.
This would allow both IFB channel 2 and
“spotter” audio to be heard in the head-
phone’s right-channel output. To achieve