Studio Technologies Gen II - Manual (Page 6)

Issue 3, July 1991 Generation II User Guide
Page 8 Studio Technologies, Inc.
Caution: An incorrect voltage setting and/or
incorrect fuse could seriously damage the
unit.
The Generation II uses an IEC standard
connector to mate with the line cord. The
line cord supplied has a North American
standard plug at one end and an IEC con-
nector at the other. In non-North American
applications, the plug must be cut off and an
appropriate plug attached. The wire colors
in the line cord conform to the internation-
ally recognized CEE color code and should
be wired accordingly:
Connection Wire Color
Neutral (N) Light Blue
Live (L) Brown
Protective Earth (E) Green/Yellow
The Generation II does not contain a power
switch. The unit will start to operate as soon
as power has been connected.
Input Trim Adjust
Once the unit has been installed and is
operating, the input trim potentiometer may
be adjusted. This control is accessible from
the back panel, directly next to the input
connector. The trim pot allows the input
level to be adjusted over a small range,
approximately ±0.75dB. Use this control
only if you need to precisely match the
signal levels in your audio chain. In most
installations, the pot can be set at 50 per-
cent rotation, and then forgotten about. The
Generation II’s electronically balanced
output stages have slight output level
changes as a function of load impedance. It
is normal to find a 0.35dB drop in output
level when driving a 600 ohm load, versus
driving a 20k ohm load. The input trim pot
can be set to “make up” this loss. Do not
use a sine wave input signal when attempt-
ing to perform this, or any other Generation
II adjustment. A single frequency input
signal produces output signals that have
level characteristics very different from
those produced by normal audio input
signals. When testing, it is best to use
normal program audio or pink noise.
Operation
Using the Controls
There are two switches and one potentiom-
eter on the front panel of the Generation II.
In addition, there is a trim potentiometer
accessible via an opening in the front panel.
There is no power switch; the Generation II
is designed for continuous operation. Not
having a power switch means that the unit
cannot be accidently turned off.
Mode Switch
The mode switch controls the overall sound
of the Generation II. The mode switch is
active only when the internal system status
switch is set to the front panel position. In
the music position, the full audio bandwidth
of the input signal is simulated. This mode
is appropriate for audio material with little or
no voice only content. In the music & voice
position, the input signal is sent through a
band-reject filter prior to getting sent to the
simulator circuits. This creates stereo simu-
lation over the low and high frequency
range, while limiting simulation in the voice
band. This mode is appropriate for audio
material that contains voice only content,
such as a film track or television show.