Studio Technologies M233-01151 - Manual (Page 11)

Model 233 User Guide Issue 5, November 2014
Studio Technologies, Inc. Page 11
Configuration
Model 233 configurations are made
using a number of DIP switches and four
trim potentiometers. One 8-position switch
assembly is used to set the gain of the
microphone preamplifier, the on/off status
of phantom power, and control of the head-
phone output mode. A 12-position switch
assembly configures which of the four cue
audio sources, as well as the sidetone au-
dio, are routed to the headphone outputs.
In addition, the last two sections of the 12-
position switch assembly are used to select
whether talkback audio will be routed to the
intercom interface. Two 8-position switch
assemblies communicate the desired oper-
ating modes to the microprocessor.
Two rotary “trim pots” are used to adjust
the sensitivity of the line inputs. Two addi-
tional rotary trim pots are provided to adjust
the sidetone (null) level for the intercom
interface’s talkback functions.
All switches and trim pots are accessible via
the bottom of the Model 233’s enclosure;
the unit does not have to be disassembled.
Changes made to any of the configuration
parameters become active immediately. To
prevent access to the configuration controls
a security plate, included with each unit, is
attached to the bottom of the enclosure.
Connectors
The Model 233 uses standard connectors
throughout. The microphone input, line
inputs, and intercom interface functions
use 3-pin female XLR connectors. The
main and line-level talkback output func-
tions use 3-pin male XLR connectors.
The headphone output utilizes a ¼-inch
3-conductor jack. The external source of
24 volt DC power is connected by way
of a 2.1 x 5.5 mm “locking” coaxial power
jack.
Additional Connector Locations
In the world of broadcast, production, and
public address audio it’s fair to say that
applications vary widely. To this end, up
to three additional XLR connectors can
be easily mounted into the Model 233’s
back panel. Multiple 3-position “headers”
located on the Model 233’s circuit board
provide technician-access to literally every
input and output connection. Moreover,
some additional features, including the
remote control inputs and tally output, are
accessible using 3-position headers. Using
a factory-available interface cable kit, these
headers allow a Model 233 to be optimized
to meet the exact needs of specific applica-
tions. For example, some applications may
prefer to use a multi-pin XLR connector to
interface with a headset. This could be eas-
ily accomplished by adding the appropriate
6- or 7-pin XLR connector and making a
few simple connections. Other applications
may benefit from having “mult” or “loop-
through” connections, something easily
incorporated into a Model 233.
Multi-Pin Headset Connectors
As previously mentioned, some applica-
tions are best supported using headsets
that interface using a multi-pin connector.
In most of these cases the desired connec-
tors are 6- or 7-pin male XLRs wired to an
industry-standard pinout scheme. Studio
Technologies offers headset connector as-
semblies that allow fast and painless instal-
lation into a spare connector location in
the Model 233’s back panel. Details about
these optional assemblies are available on
the Studio Technologies website.