Studio Technologies 770 - Manual (Page 37)

Model 770 User Guide Issue 1, October 1997
Studio Technologies, Inc. Page 37
Model 770
to the Model 770 by means of external
monitor input 1. By selecting both EXT 1
and main, a composite signal is created
for monitoring.
Metering
A VU-type meter is provided for visual level
monitoring. The meter provides the opera-
tor with an excellent sense of the average
signal level. Its source is the monitor’s
section selected audio source.
Monitor Output
The monitor section provides a monitor out-
put, along with an associated level control.
The source for the monitor output is the
selected monitor source. The monitor
output is line-level and is designed to be
connected to an audio power amplifier and
associated loudspeaker. Alternatively, it
can be connected to an “amplified” speaker
that contains an internal power amplifier.
The monitor output is muted whenever the
functions talk to telco, talk to IFB, or talk to
main and AUX are active. The mute function
limits the amount of sound that gets into the
gooseneck microphone, helping cue intelli-
gibility and preventing acoustic feedback.
Headphone Output
A separate stereo headphone output is
provided, along with an associated level
control. The ’phones output is designed
to work well with virtually any of the con-
temporary medium- and high-impedance
headphones. Sony headphones were
used during the design of the Model 770;
their high sensitivity made them go “way
loud!” While a bit “bright” in the high-end
for our taste, their comfort and fine design
make them a good choice for use with the
Model 770.
Warning: Protect your ears! The
Model 770 is capable of driving head-
phones to extremely high sound pres-
sure levels. Hearing experts advise
against continuous extended play,
especially at high levels. Polka music
has been found to be especially dan-
gerous, so please be careful.
Practical Operating Tips
Now that we’ve reviewed all the sections
that comprise the Model 770, it’s time
to actually use the unit. In the following
paragraphs some suggestions about how
to best use the Model 770 are provided.
Setting the Mixer Section’s Bus
Operating Levels
The mixer section’s main and AUX master
level controls allow the overall gain struc-
ture of the audio mixing buses to be set.
Correctly setting these controls ensures
that maximum audio quality will be
achieved. In most cases simply setting the
controls to the unity gain position is appro-
priate; the unity gain position is clearly
marked on the front panel. If you are a
fanatic for accuracy, you may want set the
level controls “precisely” using the follow-
ing procedure:
1. Set the 1kHz to main and AUX button
to the on (in) position. This will cause
a precision-level 1kHz tone to be
connected to the main and AUX buses.
2. Select main as the monitor source.
3. Adjust the main master level control so
that the meter displays 0 VU. The main
bus is now set for unity gain.
4. Select AUX as the monitor source.