Studio Technologies 5120 2011 - Manual (Page 7)

Model 5120 User Guide Issue 3, November 2011
Studio Technologies, Inc. Page 7
Model 5120
Line/IFB Output Module
mating connectors allow simple intercon-
nection 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
analog line-level audio to be connected.
The circuitry is electronically balanced and
capacitor coupled. The nominal input level
of Model 5120S (SMPTE) version modules
is +4 dBu with a maximum input level of
+24 dBu. The nominal input level of Model
5120E (EBU) version modules is 0 dBu
with a maximum level of +18 dBu.
Connections to the analog audio inputs are
made using a 5-position header connec-
tor located on the Model 5120’s rear-most
circuit board. For connecting to balanced
sources the signal + (high), signal – (low),
and common/shield connections should
be used. With unbalanced sources con-
nect signal high to the Model 5120’s signal
+ (high) and signal low to both the signal
– (low) and common/shield connections.
The required mating receptacle is from
the AMP MTA100 series of IDC (insulation
displacement) connectors. Parts are avail-
able that are compatible with 22-28 AWG
wire. The color of the receptacle indicates
the intended wire gauge. The part number
for compatibility with 24 AWG is AMP
3-643814-5. This receptacle is white in
color.
For effective and reliable termination a
semi-automatic termination tool is recom-
mended. At Studio Technologies we get
excellent results using the AMP 58074-1
handle assembly with associated die
58246-1. (For reference you’ll find these
items stocked by Digi-Key: www.digikey.
com.) This tool assembly will support
22-28 AWG and stranded wire should
be used.
The analog audio inputs should be con-
nected following the details in Figure 2.
Analog Audio Inputs
1. Common/Shield
2. + CH1
3. – CH1
4. + CH2
5. – CH2
Figure 2. Analog audio inputs