Studio Technologies 5132 2012 - Manual (Page 8)

Issue 4, September 2012 Model 5132 User Guide
Page 8 Studio Technologies, Inc.
Model 5132
Party-Line Interface Module
Indicators
The Model 5132 contains four 5-segment
LED level meters. Two meters display the
level of the signals being received from the
party-line channels and two display the level
being sent to the party-line channels. At the
time of installation and setup the meters are
invaluable in helping to confirm correct op-
eration. During normal operation the meters
offer rapid confirmation of the audio signals
flowing into and out of the module. Four
additional LED indicators are also provided
offering status indications of the internal
party-line power supply, pin 2 status, auto
null, and remote control data functions.
Pro Audio Quality
The Model 5132’s audio circuitry was de-
signed in the spirit of professional audio
equipment rather than that found in typical
party-line intercom gear. High-performance
components are used throughout, providing
low-distortion, low-noise, and high head-
room. The internal party-line power source
offers a unique level of performance—its
ability to deliver power while maintaining
audio quality is simply unmatched.
Installation
Integration of the Model 5132 into the
selected application is quite simple, only
requiring connecting analog audio inputs
and outputs along with DC power. Some
applications will also require connection
to the RS-485 data bus. The audio signals
have a nominal level of either +4 or 0 dBu,
depending on the Model 5132 version being
installed. The DC power source is nominal
12 volts with an acceptable range of 10 to
18 volts. The RS-485 data bus is a single
pair of wires that would interconnect the
Model 5132, along with other Model 5100-
Series modules, to a remote access card.
After the connections have been completed,
the module can then be secured into the
designated mounting location.
Audio Inputs
The Model 5132 allows two channels of
analog line-level audio to be connected.
Each signal is associated with one of the
two party-line interface channels. The input
circuitry is electronically balanced and ca-
pacitor coupled. The nominal input level of
Model 5132S (SMPTE) version modules is
+4 dBu with a maximum allowable input level
of +24 dBu. The nominal input level of Model
5132E (EBU) version modules is 0 dBu with
a maximum allowable level of +18 dBu.
Connections to the audio inputs are made
using a 5-position header connector located
on the Model 5132’s rear-most circuit board.
For details on appropriate mating connectors
refer to Appendix B located at the end of this
document.
For connecting to balanced sources the
signal + (high), signal – (low), and common/
shield connections should be used. With
unbalanced sources connect source signal
high to the Model 5132’s signal + (high) and
source signal low to both the signal – (low)
and common/shield connections. Refer to
Figure 2 for details.
Pin Number Function
1 Common/Shield
2 + CH1
3 – CH1
4 + CH2
5 – CH2
Figure 2. Audio Inputs