Studio Technologies 34 - Manual (Page 5)

Model 34 User Guide Issue 1, August 2005
Studio Technologies, Inc. Page 5
Model 34
Talent Amplifier
The level control labeled CH1/LEFT
adjusts the output level of the signal asso-
ciated with pin 2 of the connected IFB or
intercom circuit. In television sports broad-
casting applications this is often called the
“interrupt” channel but actually consists
of program audio that is interrupted with
talkback audio. In live radio applications
the user cue signal might be stereo,
with the left channel normally carried
on pin 2. The level control labeled CH2/
RIGHT adjusts the output level of the sig-
nal associated with pin 3 of the connected
IFB or intercom circuit. In the television
IFB world this is often referred to as the
“program” or “program only” channel. For
a stereo source this would most likely be
the right channel.
When the Model 34 is used in on-air
broadcast applications, the level controls
are specifically configured to prevent full
attenuation of the audio signals. By limit-
ing the maximum attenuation to 40 dB,
important talent cue signals will be less
likely to go unrecognized. A user can’t
accidentally (or purposefully) turn “off”
their cue feed.
The output mode select switch allows
the Model 34 to be used as a standard
stereo/2-channel listen-only unit, or to
allow the user to create a mix of the two
audio input signals. When the switch is
set to its stereo position, the channel 1/left
rotary control adjusts the level of the audio
input associated with pin 2, which is then
routed to the left channel output. (This is
the tip lead of the output connectors.) The
control labeled channel 2/right adjusts the
level of the audio input associated with
pin 2, which is routed to the right channel
output. (This is the ring lead of the output
connectors.)
When the output mode switch is set to its
mono position, the signals coming from
the two level controls is mixed (summed
or added), then routed to both output
channels. In this mode the channel 1/left
control adjusts the level of the same signal
source (pin 2 of the input connector) but
sends it to both the left and right (tip and
ring leads) of the output connectors. The
channel 2/right control adjusts the level of
the pin 3 signal source that is sent to both
the left and right output channels.
For most 2-channel IFB applications the
mode switch will be placed in the stereo
position. This will allow normal dual-ear
listening with independent level controls.
If a custom monaural mix of the two sig-
nals is desired the mode switch can be
changed to the mono position. In the
case of a single-channel IFB or intercom
application, the setting of the switch will
depend on which pin (2 or 3) the audio
input signal is present on and the type
of connected earpiece or headset.
Television Sports Applications
In television sports broadcast applications
it’s common to have two audio sources
associated with an IFB “feed.” If a “dual-
muff” headset is used in this application
the Model 34’s mode switch should be set
to its stereo position. The rotary controls
will be used to individually adjust the level
going to the left and right output channels.
If a “single-muff” headset is connected,
the switch will typically remain in its stereo
position and the channel 1/left level con-
trol is used to send “interrupt” audio to
the user. The switch can also be set to its
mono position and the two level controls
are used to create the desired mix of IFB
channel 1 and IFB channel 2.