Studio Technologies 41 2007 - Manual (Page 8)

Issue 2, February 2007 Model 41 User Guide
Page 8 Studio Technologies, Inc.
into compact desktop units. Industry-
standard listen-only belt packs from RTS,
including the 4020 and 4030, can also be
directly supported.
Alternate Applications
In addition to broadcast intercom applica-
tions, the Model 41 can be used to create
high-performance stereo headphone cue
systems. Line-level signals coming from
an audio console, a routing switcher, or
an off-air receiver can be connected to
the Model 41’s audio inputs. The IFB cir-
cuits can be connected to listen-only belt
packs, several models of which are avail-
able from Studio Technologies. For exam-
ple, the Model 35 Talent Amplifier will allow
one or two pairs of stereo headphones to
be supported. Each of the Model 41’s four
IFB circuits will support up to six Model 35
Talent Amplifiers.
Installation
In this section you will be installing and
interconnecting the Model 41. The one-
rack-space unit will be mounted in an
equipment rack. Audio input connections
will be made by way of a 25-pin D-sub-
miniature connector. IFB circuits will be
interfaced using four 3-pin XLR-type con-
nectors. AC mains power will be connect-
ed by means of a detachable cord that is
compatible with the Model 41’s 3-pin IEC
320 C14-type inlet connector.
System Components
The shipping carton contains the Model
41 Interface and associated user guide.
Units destined for North America and Ja-
pan also include an AC mains cord. Your
dealer or distributor should provide an AC
mains cord for other destinations.
Locating the Model 41
The Model 41’s IFB circuits provide DC
power and unbalanced audio to operate
external IFB user devices. These devices
are often IFB “belt packs,” broadcast
announcer consoles, or other “talkback
boxes.” The Model 41’s mounting loca-
tion will dictate the length of the cable
runs needed to link the unit with the con-
nected devices. In some cases the loca-
tion choice is already established. For
example, in field broadcast applications
the Model 41 will almost always be located
in a production truck or trailer. But in fixed
applications it may be possible to select
the Model 41’s mounting location so as to
minimize cable length. In general, shorter
cables will lead to more reliable and
consistent system performance. It’s also
helpful if a technician can readily view and
access the monitor section that is located
on the right side of the Model 41’s front
panel. The output status LEDs and levels
meters can serve important roles in ensur-
ing correct IFB circuit operation. Access
to the headphone output jack and level
control can also be useful.
Mounting the Model 41
Once the desired mounting location has
been selected, the Model 41 will require
one space (1.75 vertical inches) in a stan-
dard 19-inch (48.3 cm) equipment rack.
Secure the unit into the equipment rack
using two mounting screws per side.
Audio Input Connections
The Model 41 has eight line-level audio
inputs, arranged as four 2-channel pairs.
Each pair serves one of the four IFB cir-
cuits. Each IFB circuit, along with its two
associated audio inputs, is completely
independent. Literally any audio source