Studio Technologies 770 - Manual (Page 30)

Issue 1, October 1997 Model 770 User Guide
Page 30 Studio Technologies, Inc.
Model 770
Level Controls
Two level controls are used to set the
amount of input signal that is sent to the
monaural summing (mixing) circuitry. The
inner knob controls the level of the left
channel input signal; the outer knob con-
trols the right channel input signal. On the
front panel, note the small arrow graphic
symbol and the letter “U,” located at
approximately the “1-o’clock” rotation
position. This indicates the approximate
setting for the level controls to give unity
gain.
Bus Assignment
The signal from the mono summing ampli-
fier is sent to the main and AUX bus as-
signment buttons. These two buttons
operate in the same fashion as described
for the mic/line input channels.
Master Output
The Model 770’s master output section
contains a number of buttons and controls
associated with the main and AUX audio
buses.
Main and AUX Master Level Controls
Two controls are used to set the overall
level of the main and AUX audio buses.
On the front panel, note the small arrow
graphic symbol and the letter “U,” located
at the “1-o’clock” rotation position. This
indicates the approximate setting for the
level controls to give unity gain, and is
the position where the controls should
normally be set. Refer to the 1kHz to main
and AUX paragraph in this section for
how best to set the controls.
Limiter/Compressor
A studio-quality limiter/compressor circuit
is associated with the main audio bus. A
push-button switch selects the its status;
when the button is in the out position the
limiter/compressor is disabled. When the
button is in the on (in) position, high signal
levels on the main audio bus will be auto-
matically attenuated.
A green LED, located to the left of the
status button, displays the operating
condition of the limiter/compressor. It
lights whenever signal attenuation is
taking place.
Figure 11. Detail of front panel showing stereo
line inputs