Studio Technologies 230 2008 - Manual (Page 21)

Model 230 User Guide Issue 7, October 2008
Studio Technologies, Inc. Page 21
on the back panel. Two trim pots are
associated with the intercom channels.
They allow adjustment of the user’s side-
tone 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
circuitry allows any combination of input
assignments to be made. For example,
consider the situation where a single-
channel intercom line, with audio present
only on pin 3, is connected. In this case
it may be desirable to assign this inter-
com 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.
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
this would require that switches SW2-1,
SW2-8, and SW2-9 be placed in their on
positions.
Note that in some cases a user may wish
to wear a headset or a pair of headphones
in a left/right orientation opposite of what’s
usual. In this situation the transducer des-
ignated for the left ear would actually sup-
ply audio to the user’s right ear, and vice
versa. A specific application where this
occurs is when on-air talent needs to have
a headset’s boom microphone come across
the right side of their face, rather than
the more-typical left side. In this case
it’s important to select the left- and right-
channel headphone source assignment
accordingly. With the Model 230’s flexible
source selection there’s no reason why
users, such as on-air talent, shouldn’t
have their cue sources assigned correctly.
Special applications may benefit by us-
ing the Model 230 in a special “2-channel
headphone output mixer” mode. This is
accomplished by first configuring the head-
phone output to monaural. (Details on how
to accomplish this are described later in
this section of the user guide.) Next the cue
source whose level is to be adjusted by the
rotary control on the left side of the front
panel is assigned to the left channel. Finally,
the cue source whose level is to be adjusted
by the right control is assigned to the right
channel. During operation the user will cre-
ate their desired cue mix using the two front-
panel controls.
There may also be cases where a monaural
“single-muff” headset or headphone will be
connected to the Model 230’s headphone
output. In this case the desired source
must be routed only to the left channel.
This is because the 2-conductor plug that’s
typically associated with a mono headset
or headphone will connect only to the tip
lead (left channel) of the headphone output.
Signals assigned to the right channel will
not be heard by the user.
Headphone Output Mode
Switch SW1-6 allows a monaural head-
phone output to be created. This is
accomplished by summing (adding) the
selected left- and right-channel cue signals.
The combined signals are sent to both the