Studio Technologies 60A - Manual (Page 18)

Issue 1, June 2003 Model 60A/61 User Guide
Page 18 Studio Technologies, Inc.
this condition.) So in conclusion, use a
light touch on the button and everyone
should stay reasonably happy!
Power Amplifier Input Sensitivity
Optimum StudioComm performance is
obtained when the input sensitivity of the
control room power amplifier, or amplified
speakers, is adjusted to match the Model
60A’s control room output level. With
normal, but loud, listening levels you
should find the level potentiometers on
the Model 61 to be set to about 2 o’clock.
If you find that you don’t have to turn up
the Model 61’s control that high, reduce
the input sensitivity of the power amplifier
so you can operate at the 2-o’clock
position. Most power amplifiers and
amplified speakers have controls on
their inputs to allow easy adjustment
of their input sensitivity.
Slating Issues/Cue Audio to Dub Output
From the factory, voice cues are sent only
to the headphone output. It was antici-
pated that this would be the most common
use, specifically allowing personnel in the
control room to talk to talent in a studio
or voice-over booth. In some cases it may
be desirable to have a “slate” function—
sending a voice cue to an audio worksta-
tion or other recording medium. There is
a means of achieving this by modifying the
Model 60A to route the cue audio to the
dub output. From the factory this is not
implemented, but is as simple as having
a qualified technician install two resistors
into the Model 60A’s printed circuit board.
After the modification, whenever the cue
button is pressed on the Model 61 Control
Console the voice audio will go out both
the headphone and the dub outputs. The
limitation here is that you have to be care-
ful of what is being routed through the dub
output when you are voice cueing to the
headphones, and vice versa; a voice cue
to the phones is a voice cue to the dub!
For details on implementing this modifica-
tion you’ll need a copy of the Model 60A
schematic diagrams, available by contact-
ing the factory.
Modifying the Back-Panel Headphone
Output
Each headphone output, front panel and
back panel, is driven by an independent
output circuit. From the factory the same
audio signal(s) connect to each output
circuit. Provision has been made to allow
the audio source for the back-panel head-
phone output circuit to be changed. The
revised output will give flexibility for those
rare applications that seem to so often
arise! Once modified, the back-panel
headphone output will act more like that
of a line-level output. The modification
choices are pre-level-control headphone
audio or cue audio. The pre-level-control
audio signal is the same source as the
standard headphone audio signal, but is
not effected by the front-panel level con-
trol. This implementation would be useful
where an audio facility has an existing
headphone amplifier system with level
controls. The other choice, having cue
audio as the source, would prove useful
for specialized talkback or cueing applica-
tions, such as remote ISDN configurations.
In this configuration, when the cue button
on the Model 61 is active the microphone
audio will be present on the back-panel
headphone output. When the cue button
is not pressed, no audio will be present
on the back-panel headphone output jack.