Studio Technologies 58 2000 - Manual (Page 16)

Model 58/59 User Guide Issue 4, December 2000
Studio Technologies, Inc. Page 17
for Surround
noise, connect signal high to + on the
D-sub, and shield to – on the D-sub;
leave the shield connection unterminated.
It is important all channels associated
with that at least one of the multi-channel
inputs be wired by way of an audio patch
bay. This will allow the channels to be
easily rerouted. While signals generated
within a facility may follow a specific for-
mat, such as L, C, R, LS, RS, Sub, it is
possible that media provided by an outside
source will follow a different one.
Monitor Outputs
The connector labeled OUTPUTS
provides access to the two, 2-channel
monitor outputs. Please refer to Figure 8
for details on the exact “pin out” of the
D-sub connector.
The monitor outputs are intended for
connection to audio amplifiers associated
with monitor loudspeakers, or to the inputs
of loudspeakers with integrated amplifiers.
Note that there are two monitor output
circuits which are switched, using relays,
to the 2-channel A and B output connec-
tions. Under normal operation only one
set of outputs, A or B, will be active at
the same time. An output which is not
active has a short-circuit placed across
its connections.
Note: While the Model 58’s electroni-
cally balanced output circuits are
capable of driving loads of 600 ohms
or greater, the output level will drop
slightly as the load impedance ap-
proaches 600 ohms. A 0.5dB differ-
ence in output level can be expected
as the load impedance changes from
10k ohms to 600 ohms. This applies to
all of the electronically balanced output
circuits provided on the Model 58.
The monitor outputs are electronically
balanced and are capable of driving bal-
anced or unbalanced loads of 600 ohms
or greater. While balanced operation is
preferred, unbalanced operation does not
pose a problem. To connect to an unbal-
anced load connect the + terminal of the
D-sub as signal high, and both the – and
shield as the signal low/shield. For optimal
unbalanced operation, it is important to
connect both – and shield together directly
on the D-sub, and not where the cable
terminates at the far end.
Meter Outputs
The connector labeled OUTPUTS pro-
vides access to the 2-channel meter out-
put. Please refer to Figure 8 for details on
the exact “pin out” of the D-sub connector.
Signal Signal
Connection High (+) Low (–) Shield
MONITOR OUT A-1 24 12 25
MONITOR OUT A-2 10 23 11
MONITOR OUT B-1 21 9 22
MONITOR OUT B-2 7 20 8
METER OUT 1 18 6 (See Note 3) 19
METER OUT 2 4 17 (See Note 3) 5
BYPASS IN 1 15 3 16
BYPASS IN 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 loosely follows Tascam
DA-88 convention. Modified DA-88-type wiring
harnesses are required, along with 4-40 screw
threads.
3) Meter outputs are unbalanced. Pins 6 and
17 internally connected to Model 58 shield.
Figure 8. Connections for Monitor Outputs,
Meter Outputs, and Bypass Inputs