Studio Technologies 5120 2014 - Manual (Page 7)

Model 5120 User Guide Issue 5, October 2014
Studio Technologies, Inc. Page 7
Model 5120
Line/IFB Output Module
connections are made using 3-pin male
XLR connectors. The two analog audio
inputs use a 5-position, 0.1-inch “header”
connector. A DIN 1.0/2.3 coaxial connector
is used to interface with the digital audio
input. The DC power input connections use
a 4-position, 0.1-inch header. Low-cost IDC
(insulation displacement) mating connec-
tors allow simple interconnection with the
analog audio inputs and DC power signals.
For compliance with international broad-
cast audio level standards two versions of
the Model 5120 are available. The Model
5120S supports SMPTE® audio levels
where the analog audio reference level is
+4 dBu and the digital audio reference level
is –20 dBFS (SMPTE RP155). The Model
5120E supports applications that require
European Broadcast Union (EBU) compli-
ance with an analog audio reference level
of 0 dBu and a digital audio reference level
of –18 dBFS (EBU R68).
Installation
Integration of the Model 5120 into the
selected application is quite simple, only
requiring connecting sources of audio and
DC power. The audio source can be either
analog or digital. The DC power source is
nominal 12 volts with an acceptable range
of 10 to 18 volts. After the connections
have been completed, the module can then
be secured into the designated mounting
location.
Analog Audio Inputs
The Model 5120 allows two channels of an-
alog line-level audio to be connected. The
input circuitry is electronically balanced and
capacitor coupled. The nominal input level
of Model 5120S (SMPTE) version modules
is +4 dBu with a maximum allowable input
level of +24 dBu. The nominal input level
of Model 5120E (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 locat-
ed on the Model 5120’s rear-most circuit
board. For details on appropriate mating
connectors refer to Appendix A located
at the end of this document.
For connecting to balanced sources the
signal + (high), signal – (low), and com-
mon/shield connections should be used.
With unbalanced sources connect signal
high to the Model 5120’s signal + (high)
and signal low to both the signal – (low)
and common/shield connections. Refer
to Figure 2 for details.
Analog Audio Inputs
1. Common/Shield
2. + CH1
3. – CH1
4. + CH2
5. – CH2
Figure 2. Analog audio inputs
Digital Audio Input
The Model 5120’s two audio input chan-
nels can be supplied in the form of a 75
ohm unbalanced digital signal that is com-
patible with the AES3 standard. The physi-
cal connection is made by way of a DIN
1.0/2.3-compliant receptacle. This recepta-
cle is located adjacent to the analog audio
input connector. This type of signal and
connector is commonly used in broadcast