Studio Technologies 220 2008 - Manual (Page 28)

Issue 4, October 2008 Model 220 User Guide
Page 28 Studio Technologies, Inc.
counterclockwise direction reduces the
level of the right channel providing the user
with more perceived level in the left chan-
nel. If set to the reverse mode, rotating the
balance control in the counterclockwise
direction reduces the level of the left chan-
nel providing the user with more perceived
level in the right channel.
When in the level/balance mode and the
minimum output level is set to –40 dB,
turning the level control to its fully coun-
terclockwise position will place both head-
phone output channels to 40 dB below
maximum. This ensures that talent will
never be fully “isolated” from potentially im-
portant cue signals. In addition, rotating the
balance control to either its fully clockwise
or fully counterclockwise position will cause
the applicable channel to be 40 dB below
its maximum. If set to the full mute mode,
turning the level control to its fully counter-
clockwise position will cause both the left
and right channels to fully mute. In addi-
tion, rotating the balance control to either
its fully clockwise or fully counterclockwise
position will cause the applicable channel
to fully mute.
Each control has a mechanical step
(detent) that is located at the halfway (50%)
position of its rotation range. The balance
control will typically be set to its center,
detent position, making the level of the left
and right channels equal. In an ideal instal-
lation, the level control can also be set to
its detent position and provide a comfort-
able headphone output level. This will allow
the user, in response to their preference
or a changing environment, to adjust the
level and balance controls as desired.
The detent positions will always remain as
a useful reference point. To achieve this
condition the audio level on the connected
IFB circuit, or line inputs, must be ad-
justed as required. Spending a few extra
minutes “trimming” the connected audio
levels, rather than just providing what-
ever happens to come up, should prove
worthwhile. The result will be talent that is
more relaxed, and an overall production
that works more smoothly. As previously
mentioned, a level trim potentiometer is
associated with each line input. If the line
inputs are utilized as cue sources, adjust-
ing the trim pots may be helpful in achiev-
ing the desired adjustment range of the
level controls. Refer to the Technical Notes
section of this user guide for details.
Advanced
Operation
Adjusting the Line Input
Trim Pots
As has been previously mentioned, as-
sociated with the line inputs are trim pots
that allow the input levels to be adjusted.
The two trim pots are accessible by way
of round openings in the bottom of the
Model 220’s enclosure. By adjusting these
trim pots, signals with a nominal signal
level of –12 dBV to +6 dBu can be effec-
tively used as cue sources. Unfortunately,
there are no definitive rules regarding
how best to adjust the trim pots, but some
suggestions may prove to be valuable.
Depending on how the line inputs are
utilized, the trim pots can be used to either
adjust the absolute level each line input
signal, or to adjust the relative level of the
signals when compared to other sources.
The following examples may provide
some clarification.