Studio Technologies 68 V.1 - Manual (Page 15)

Model 68/69 User Guide Issue 2, June 1999
Studio Technologies, Inc. Page 15
for Surround
CONTROL CONSOLE on the back panel
of the Model 68 is used to connect to the
Model 69.
Should a cable of different length be
required, it should be wired in a one-to-
one fashion for all 9 pins. Pin 1 carries
signal common, and must be connected
at both ends. A shield connection for the
cable should be connected to pin 1 at one
end. For best performance the cable
generally should not exceed 50 feet (15.3
meter) in length. The reality is that a cable
much longer in length should work, as long
as an excellent-quality cable is utilized.
We define “excellent” as extensive shield-
ing along with very low capacitance. The
low cable capacitance limits the amount of
data-signal waveform distortion. As far as
an actual maximum length, just test and
see how far away you can go—if it works,
it works!
AC Mains Power
The Model 68 is internally configured
to operate from either nominal 100, 120,
or 220/240V, 50/60Hz. Units shipped to
North America are factory selected for
120V operation. Units bound for Japan are
selected for 100V, while our friends “down
under” and in Europe receive units set for
220/240V. Before connecting the Model 68
to AC mains power, check that it is config-
ured to match the local mains voltage.
Look on the back panel (adjacent to the
power entry connector) for the factory-
configured voltage. Note than an incorrect
configuration could seriously damage the
unit. Should it be necessary to change the
unit’s operating voltage it must be per-
formed only at the factory or by an autho-
rized service technician.
The Model 68 uses an IEC-standard
connector to mate with the AC mains
cord. The wire colors in the AC mains
cord should conform to the internationally
recognized CEE color code and must
be wired accordingly:
Connection Wire Color
Neutral (N) Light Blue
Line (L) Brown
Protective Earth (E) Green/Yellow
Safety Warning: The Model 68 does
not contain an AC mains disconnect
switch. As such, the AC mains cord
plug serves as the disconnection
device. Safety considerations require
that the plug and associated outlet be
easily accessible to allow rapid discon-
nection of AC mains power should it
prove necessary.
As soon as AC mains power is applied,
the Model 68’s power present LED will
light. The Model 69 will go through a
power-up sequence, lighting each LED
in secession. The data active LED on the
Model 68 will briefly light upon completion
of the Model 69’s power-up sequence.
Configuration
After the physical installation has been
completed, several configuration issues
must be addressed. On the Model 68 the
surround and stereo input signal levels
must be calibrated using the trim potenti-
ometers. The operating parameters of the
system should be set using the Model 69
Control Console’s configuration mode.