Headphone source selection – Studio Technologies 220 2013 User Manual
Page 18
Issue 5, February 2013
Model 220 User Guide
Page 18
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
headphone sources are IFB channel 1,
IFB channel 2, line input 1, and line input
2. The IFB channels are provided by way
of the IFB input connector located on the
Model 220’s back panel. The line inputs
are connected by way of two connectors
also located on the back panel. Associ-
ated with line inputs 1 and 2 are level trim
potentiometers. They are provided 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.
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 220’s circuitry
allows any combination of input assign-
ments to be made. For example, consider
the situation where a single-channel IFB
system, with both program and interrupt
audio on pin 3, is connected to the Model
220. In this case it may be desirable to
assign this IFB signal to both the left and
right channels. This would entail setting
switches SW2-2 and SW2-6 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
Model 220. In addition, a line-level audio
signal from a golf event “spotter” is con-
nected 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 headphone’s
right-channel output. To achieve this would
require that switches SW2-1, SW2-6, and
SW2-7 be placed in their on positions. Note
that using another announcer console unit
from Studio Technologies at the “spotter”
location could also prove effective. It would
provide all the necessary microphone pre-
amplifier, talkback routing, and headphone
monitoring resources.
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
is usual. In this situation the transducer
designated for the left ear would actually
supply audio to the user’s right ear, and
vice versa. A specific application where
this occurs is where on-air talent needs to
have a headset’s boom microphone come
Figure 6. Left and right channel headphone
source selection settings