Studio Technologies 58 1998 - Manual (Page 16)

Issue 2, April 1998 Model 58/59 User Guide
Page 16 Studio Technologies, Inc.
for Surround
reliable interconnection. (If you are the
compulsive type, the D-subs on the Model
58 use 4-40 threads.)
Audio Input, Output and Insert
Connections
Audio input and output connections are
made by way of three 25-pin D-subminia-
ture (“D-sub”) connectors. Located on the
Model 58’s back panel, the connectors are
labeled INPUTS, INSERTS, and OUT-
PUTS. Three cable harnesses, each with
a 25-pin D-sub plug (male) on one end,
and the desired connectors on the other
end, are necessary. These cable har-
nesses are not supplied by Studio Tech-
nologies.
The wiring scheme used by the D-subs
comply with that made familiar by
TASCAM with their DA-88 product. A
wiring harness prepared for the Model 58
input channels would be identical to that
of a DA-88 input harness. A wiring har-
ness prepared for the Model 58 output
channels would be identical to that of a
DA-88 output harness. A harness for the
Model 58 inserts and outputs would be
wired in a slightly different fashion. Please
refer to Figures 7, 8, and 9 for exact con-
nection details. Note that the Model 58’s
D-sub connectors use 4-40 threads.
When it came time for Studio Technolo-
gies to test the first Model 58 Central
Controller, standard DA-88 harnesses
were purchased. They turned out to be
of very good quality, and at a reasonable
price. Unless there’s a special need, it
may be cost and time effective for you to
purchase commercially made cable as-
semblies. Let the large market for DA-88-
style cabling help you painlessly install
your system!
Line Inputs
The connector labeled INPUTS is used to
interface with the eight line input circuits.
Please refer to Figure 7 for details on the
exact “pin out” of the D-sub connector.
The electronically balanced input circuitry
is intended for connection to balanced or
unbalanced sources with a nominal signal
level of +4dBu. A trim potentiometer is
associated with each input, allowing ad-
justment of the input sensitivity over a
±2dB range. The configuration sections of
this guide provides details on using the
trim pots.
Balanced sources should be wired so that
signal high is connected to + on the D-sub,
signal low to – on the D-sub, and shield to
the D-sub’s shield connection. With an
unbalanced source connect signal high to
the + connection on the D-sub, and shield
to both the – and the shield connection on
the D-sub. If connecting to an unbalanced
source in this manner results in hum or
Signal Signal
Connection High (+) Low (–) Shield
IN 1-1 24 12 25
IN 1-2 10 23 11
IN 2-1 21 9 22
IN 2-2 7 20 8
IN 3-1 18 6 19
IN 3-2 4 17 5
IN 4-1 15 3 16
IN 4-2 1 14 2
Notes: 1) Connector type on Model 58 is 25-pin
D-subminiature female. Installer must
provide plug (male). Connector uses 4-40
threaded inserts for locking with mating plug.
2) Wiring scheme follows Tascam DA-88
convention. Standard DA-88-type wiring
harnesses are directly compatible, with the
exception of 4-40 screw threads being
required.
Figure 7. Connector Pin Out for Inputs