Studio Technologies 5110 V.3.0 - Manual (Page 6)

Issue 6, October 2012 Model 5110 User Guide
Page 6 Studio Technologies, Inc.
Model 5110
Mic/Line Input Module
Six pushbutton switches on the Model
5110’s front panel allow rapid selection of
the input gain and phantom power on/off
status. A simple button-press sequence
allows the six pushbutton switches to be
temporarily “locked out” to prevent acciden-
tal adjustment. This can be very useful in
field applications, helping to ensure that un-
authorized Model 5110 performance chang-
es are not made. An LED indicator will light
to alert users that pushbutton switch func-
tionality has been disabled.
The Model 5110’s audio performance
is simply excellent. A low-noise, wide
dynamic-range preamplifier section ensures
that the input audio quality is preserved.
The outputs of the mic-preamp circuitry are
routed to two analog audio output sections.
These provide line-level, balanced (differen-
tial), capacitor-coupled outputs.
The audio from the mic-preamps is also
routed to high-performance analog-to-digital
conversion (ADC) sections that support a
sample rate of 48 kHz with a bit depth of 24.
A precision voltage reference assists the
ADC circuits in performing accurate conver-
sion. The signals, now in the digital domain,
are formatted into AES3 digital audio. This
2-channel digital bit stream is output as a 75
ohm unbalanced signal for direct connection
into broadcast applications.
All audio inputs and outputs were carefully
designed for use in permanent as well as
field applications. Extensive filtering on
the inputs minimizes the chance that radio
frequency (RF) energy will interfere with
audio input sources. Other components
were included to address ESD (“static”)
and DC overload situations. The DC power
input is protected from accidental polarity
reversal.
The Model 5110 requires an external
source of nominal 12 volts DC for opera-
tion. The acceptable input voltage range is
10 to 18 allowing a variety of power sourc-
es to be utilized. Internal power supply
circuitry within the Model 5110 creates the
voltages required for the analog and digital
circuitry.
Standard connectors are used throughout
the Model 5110. Input audio connections
are made using gold-plated 3-pin female
XLR connectors. A DIN 1.0/2.3 coaxial
connector is used to interface with the
digital audio output. The 2-channel analog
audio outputs use a 5-position, 0.1-inch
“header” connector. The DC power input
and data bus signals use a 4-position,
0.1-inch header. Low-cost IDC (insulation
displacement) mating connectors allow
simple interconnection with the analog
audio output and DC/data signals.
For compliance with international broad-
cast audio level standards two versions
of the Model 5110 are available. The Model
5110S supports the SMPTE® audio
standards which have an analog audio
reference level of +4 dBu and a digital
audio reference level of –20 dBFS
(SMPTE RP155). The Model 5110E sup-
ports applications that require European
Broadcast Union (EBU) compliance where
the analog audio reference level is 0 dBu
and the digital audio reference level is
–18 dBFS (EBU R68).
Provision has been made in the Model
5110’s hardware to support insertion of
metadata information into its AES3 digital
audio output. Following the Audio Engi-
neering Society’s AES52-2006 standard,
this metadata could be used to include
source location identification data within
the audio data stream. While not currently