Studio Technologies 240 - Manual (Page 7)

Model 240 User Guide Issue 1, August 2013
Studio Technologies, Inc. Page 7
Line-Level Audio Inputs
Two line-level audio inputs allow the con-
nection of a variety of cue signals. The
inputs are capacitor and transformer
coupled, ensuring consistent and reliable
interfacing with almost any audio source
found in the field. Two trim potentiometers
allow adjustment of the input signal level.
The two line inputs can be configured for
use with the four main outputs as well as
with the headphone output. The four main
outputs can be independently configured
to use this “program” audio to create talent
cue signals. While line input 1 is always
assigned to main outputs 1 and 3, the
choice of line input 1 or line input 2 is
independently assignable to main outputs
2 and 4. Each main output can then be
configured for how it uses its associated
program audio source. They can be set to
have no program audio, continuous pro-
gram audio that combines with talk audio,
program audio that’s fully muted when talk
is active, or program audio that’s “dimmed”
(attenuated by 15 dB) when talk is active.
In this way four independent “dry” (non-
powered) talent cue (IFB) channels can
be easily created.
Headphone Output
A 2-channel (stereo) headphone output
is provided for monitoring program or in-
tercom audio signals. Physically the head-
phone output connections are part of the
5-pin XLR headset connector located
on the Model 240’s back panel. Each
headphone output channel can be inde-
pendently configured to monitor the two
line-level inputs or the two intercom inter-
face channels. Two rotary controls allow
the user to independently adjust the level
of the left and right headphones output
channels. A configuration setting allows
the headphone output to be placed in
monaural mode, mixing the signals select-
ed for the left and right channels. This can
be useful when single earpiece (“single-
muff”) headsets or in-ear transducers are
used. A sidetone function is also available,
allowing audio from the microphone input
to be routed to the left and/or right head-
phone channels. A separate rotary control
is provided for the user to adjust the side-
tone level.
Provision has also been made to allow
two additional line-level audio sources
to be connected and routed to the head-
phone output channels. Using optional
line input cards mounted in the back panel
openings of the Model 240, functions such
as announcer/commentator pre-fader
listen can be implemented.
There may be applications where con-
necting monitor loudspeakers, rather than
a headset or headphones, would be ben-
eficial. This can be easily implemented by
installing one or two optional line output
cards. A configuration feature allows the
headphone output level to be reduced
(“dimmed”) whenever a talk function is
active. This will minimize the chance that
acoustical interference and possible feed-
back will take place between the loud-
speakers and the connected microphone.
Relay Contacts
Five normally open (not shorted) solid-
state relay contacts are provided as “tally”
signals for application-specific use. Four of
the contacts are associated with the four
talk functions, closing (shorting) whenever
a pushbutton switch and associated main
output function is active. They can prove
useful in applications such as enabling a
call light or activating a wireless transmit-
ter. The fifth contact offers a special func-
tion, closing (shorting) whenever any of the