Model 5110
Mic/Line Input Module
User Guide
Issue 6, October 2012
This User Guide is applicable for serial numbers
M5110-00151 and later with software version 3.0 and higher
Copyright © 2012 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50175-1012, Issue 6
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Model 5110
Mic/Line Input Module
Table of Contents
Introduction ................................................................... 5
Installation .................................................................... 7
Configuration ................................................................ 9
Operation ...................................................................... 9
Technical Notes ............................................................ 10
Specifications ............................................................... 12
Appendix A—Model 5110 Front Panel and
Printed Circuit Board (PCB) Dimensions ...................... 13
Appendix B–Interconnection Details ............................. 14
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Mic/Line Input Module
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Model 5110
Mic/Line Input Module
Introduction
The Model 5110 Mic/Line Input Module
is a compact, self-contained 2-channel
module intended for use in custom broadcast, live-performance, and general audio
applications. Offering a “building block”
of resources, the Model 5110 provides
two channels of high-performance audio
capability in an easy-to-use yet technically
sophisticated package. The module’s basic
functions include selectable input gain,
48 volt phantom power, status LED indicators, and analog and digital audio outputs. Module operation requires only an
externally-provided source of 12 volts DC.
Advanced features include user control
“lock out” and remote monitoring/control
capability.
Applications for the Model 5110 include
sports broadcasting booth packages,
remote news gathering “fly-packs,” stadium
audio/video interface (I/O) locations, and
government/corporate/performance space
infrastructure projects. The number of
Model 5110 modules used in a project can
vary widely—from one to dozens. And in
each case the Model 5110’s performance
will be completely “pro” with audio quality,
reliability, and installation flexibility matching that of large-scale consoles, routers,
and transport resources. Typical applications will find the Model 5110’s analog and
digital outputs being interfaced with inputs
on fiber-optic transport modules, audio/
video routers, and broadcast/production
consoles.
Model 5110 Mic/Line Input Modules do not
include a mounting enclosure or chassis.
They are intended for mounting in custom
19-inch rack panels, equipment boxes,
broadcast furniture, or other specialized
settings. It is expected that integration
firms will create applications that use
Model 5110 modules as part of complete
broadcast, production, corporate, and
government solutions.
Two microphone or line-level audio signals
can be connected to the Model 5110’s
front panel XLR connectors. Using the
front-panel pushbutton switches, the sensitivity of each input can be adjusted to one
of four gain settings: line (0 dB), 15 dB,
30 dB, or 45 dB. To support high-performance microphones +48 volt phantom
power can be selected as required. Status
LEDs are provided to display the current
settings of the sensitivity and phantom
power. A 7-segment LED level meter is
also provided for each channel.
Figure 1. Model 5110S Mic/Line Input Module Front and Back Views
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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 accidental adjustment. This can be very useful in
field applications, helping to ensure that unauthorized Model 5110 performance changes are not made. An LED indicator will light
to alert users that pushbutton switch functionality 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 (differential), 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 conversion. 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 operation. The acceptable input voltage range is
10 to 18 allowing a variety of power sources 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 broadcast 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 supports 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 Engineering Society’s AES52-2006 standard,
this metadata could be used to include
source location identification data within
the audio data stream. While not currently
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Model 5110
Mic/Line Input Module
implemented in the Model 5110’s firmware,
it’s possible in the future it may be. Contact
the factory for details.
Using an optional remote access module,
up to sixteen Model 5110 modules can
be remotely monitored and controlled. Using the remote access module’s Ethernet
interface and SNMP MIB objects, personnel using “GUI” applications or remote
control systems will be able to access all
the Model 5110’s functions, including input
sensitivity, phantom power on/off, and
pushbutton switch lock out. A local 2-wire
RS-485 data bus is used to interface the
remote access module with the one or
more Model 5110 Mic/Line Input Modules.
Installation
Integration of the Model 5110 into the
selected application is quite simple, only
requiring connecting to the analog and
digital audio 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 5110
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 5110, 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.
Analog Audio Outputs
Associated with each of the Model 5110’s
two audio output channels is a balanced
(differential), line-level analog output. The
circuitry is electronically balanced and capacitor coupled. The nominal output level
of a Model 5110S (SMPTE) version module is +4 dBu with a maximum output level
of +24 dBu. The nominal level of a Model
5110E (EBU) version module is 0 dBu with
a maximum level of +18 dBu.
Connections to the audio outputs are
made using a 5-position header connector
located on the Model 5110’s rear-most
circuit board. For details on appropriate
mating connectors refer to Appendix B
located at the end of this document.
For connection to balanced inputs on
related equipment the signal + (high) and
signal – (low) connections should be used.
Pin 1, common/shield, may or may not
need to be connected as dictated by the
specific installation.
When interfacing the outputs to unbalanced inputs on associated equipment
connect only to the Model 5110’s signal
+ (high) and common/shield. Do not make
any connections to the Model 5110’s
– (low) terminals.
Units with serial numbers in the range
of 00151 to 00200 (red-colored circuit
boards) should be connected following the
details in Figure 2.
Units with serial numbers of 00201 and
later (black-colored circuit boards) should
be connected following Figure 3.
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Model 5110
Mic/Line Input Module
Pin Number Function
1 Common/Shield
2
3
4 – CH2
5
Figure 2. Analog Audio Outputs for Model 5110
Units with Serial Numbers 00151-00200 (redcolored circuit boards)
Pin Number Function
– CH1
+ CH1
+ CH2
1 Common/Shield
2
3
4 + CH2
5
Figure 3. Analog Audio Outputs for Model 5110
Units with Serial Numbers 00201 and Later
(black-colored circuit boards)
+ CH1
– CH1
– CH2
Digital Audio Output
The Model 5110’s two audio output channels are available in digital form by way
of a DIN 1.0/2.3-compliant receptacle.
This receptacle is located adjacent to
the analog audio output connector. This
is an AES3-compliant unbalanced 75 ohm
signal that will transport audio, when using
good-quality coaxial cable, several thousands of feet.
The digital audio output signal has a
sample rate of 48 k/sec and a bit depth of
24. The nominal level of the digital audio output is –20 dBFS for Model 5110S
(SMPTE) modules and –18 dBFS for
Model 5110E (EBU) modules.
DC Input and Data
A 4-position header, located adjacent to
the analog audio output header, is used
to connect DC power and RS-485 data to
the Model 5110. For details on appropriate mating connectors refer to Appendix B
located at the end of this document.
A source of nominal 12 volts DC, with an
acceptable range of 10 to 18, is required
for Model 5110 operation. The maximum
current is 300 milliamperes at 12 volts DC.
For remote control operation an RS-485
data bus connection from a compatible
Studio Technologies’ remote access module is required. Most applications will only
have the DC power connections implemented so these two pins will typically
remain unconnected. Refer to Figure 4
for details.
Pin Number Function
1 – DC (Common)
2
3
4 – Data (RS-485)
Figure 4. DC Input/Data
+ DC (10-18 volts)
+ Data (RS-485)
Mounting
The Model 5110 is intended for mounting into an installation-specific enclosure
or rack panel. Refer to Appendix A for the
unit’s dimensions and mounting screw
locations. Please contact the factory to
discuss mounting options.
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Model 5110
Mic/Line Input Module
Configuration
RS-485 Address ID
One configuration setting must be performed for applications that implement
remote control of Model 5110 functions.
Up to sixteen Model 5100-Series modules
can “share” an RS-485 data bus, but each
must have a unique address ID. Selecting
the device’s address ID involves setting
four DIP switches. Refer to Figure 5 for
details.
Connecting Input Signals
Two 3-pin female XLR connectors are provided to interface signals with the Model
5110’s mic/line inputs. Signals with a wide
range of nominal levels can be successfully connected. For balanced signals pin 2
should be connected to signal + (high) and
pin 3 should be signal – (low). Pin 1 should
be connected to the cable shield.
Unbalanced signals can also be connected. In most cases signal + (high) should
be connected to pin 2 and common/shield
should be connected to both pins 1 and 3
of the 3-pin male XLR mating connector.
If this connection arrangement results in
hum or noise it’s possible that connecting
signal + (high) to pin 2 and signal common/shield only to pin 3 may be effective.
Input Sensitivity Selection
Figure 5. RS-485 Address ID Settings
Operation
Upon power being applied to the module
the signal level and status LEDs will go
through a test sequence, confirming their
performance. Once that has been completed the unit will begin normal operation,
returning to the settings that were present
at the time of the previous power off.
Two pushbutton switches are associated
with each mic/line input and are used to
adjust the sensitivity of the input circuitry.
In the line position the Model 5110 will
provide 0 dB of gain which results in unity
input-to-output performance. A connected
signal that has a level of 0 dBu will result
in a 0 dBu signal on the analog output. The
signal level of the digital output will depend
on the version of Model 5110 module. With
a Model 5110S module and an input level
of 0 dBu, the digital output level will be
–24 dBFS. With a Model 5110E module
the digital output level will be –18 dBFS.
Use the up and down pushbutton switches
to adjust the input sensitivity from the
choices of line (0 dB), 15, 30, and 45 dB.
The Model 5110 is not intended to precisely control the gain applied to an input signal. The goal is to amplify the input signal
such that it can be effectively transported
to the next piece of audio equipment in the
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Model 5110
Mic/Line Input Module
chain. Gain should be applied only so that
the signal can reach a level that ensures
a good signal-to-noise ratio is maintained
while minimizing the risk of signal overload. The Model 5110’s output signals
will be connected, either directly or via
associated audio transport equipment,
to inputs on an audio console which will
have precise control of the signal levels.
Level Meters
Associated with each mic/line input is a
7-segment LED level meter. These meters
are provided for use during input sensitivity
setting as well as being useful for general
signal monitoring. The labeling of the
meters refers to the level in reference to
the module’s analog reference level. For
the Model 5110S (SMPTE) version the
analog reference level is +4 dBu. For the
Model 5110E (EBU) version the analog
reference level is 0 dBu. So for example, a
signal that is sufficient to just cause the “6”
LED to light will represent an analog output
level that is 6 dB above analog nominal.
This will equate to +10 dBu for the Model
5110S and +6 dBu for the Model 5110E.
This will also represent digital output levels
of –14 dBFS for the Model 5110S and
–12 dBFS for the Model 5110E.
Phantom Power
To support high-performance microphones,
the Model 5110 can provide a source of
+48 volt DC phantom power. A pushbutton switch is associated with each
channel and allows phantom power on/off
control. For maximum flexibility phantom
power is available in all four input sensitivity settings (line, 15, 30, and 45 dB). While
phantom power would not typically be
used in the line setting it’s still available
for special applications.
Pushbutton Switch
“Lock Out”
To prevent unauthorized changes to the
Model 5110’s input sensitivity and phantom
power settings a pushbutton switch “lockout” function is provided. Simply press and
hold both +48V (phantom) pushbutton
switches for about two seconds to enable
(or disable) the pushbutton switch lock-out
function. Whenever the pushbutton switch
lock-out function is active the Data/Lock
LED, located on the bottom right side of
the front panel, will light.
Remote Control
The Model 5110 is capable of being
monitored and controlled remotely. Whenever control data (via the RS-485 link) is
active the Data/Lock LED will “flicker” in
response. And, depending on the priority
level of the data, the input sensitivity and
phantom power on/off status may change,
even if the pushbutton switch lock-out
function is active.
Technical Notes
Software Version Display
After the Model 5110’s power-up sequence
has completed, the unit’s LEDs are used to
automatically display the software version
number. This is useful when working with
factory personnel on application support
and troubleshooting situations. The seven
level meter LEDs associated with channel 1 audio are used to display the major
release number with a range of 1 through
7. The seven level meter LEDs associated
with channel 2 audio are used to display
the release sub-number which ranges
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Model 5110
Mic/Line Input Module
from 0 to 7. (No channel 2 LEDs lit indicates sub-number 0.) The software version
number will display for approximately one
second after the power-up sequence has
completed but before normal operation will
begin. Refer to Figure 6 for a detailed view
of the LEDs and the corresponding software version numbering scheme.
Note that while it’s easy to determine
which software version is loaded into
the Model 5110 a trip back to the factory is required to update it. The 8-bit
microcontroller that provides the unit’s
logic “horsepower” also includes internal
Release Sub-Number
Major Release Number (No LED lit indicates .0)
O O O O O O O O O O O O
1 2 3 4 5 6 7 .1 .2 .3 .4 .5 .6 .7
FLASH memory. This nonvolatile memory
is used to store the operating software
(“firmware”). Re-programming this memory
requires using a specialized programming
unit. While not outrageous in price, it still
costs in the range of US$500. The programmer uses a ribbon cable and socket
to interface with a 6-pin “header” on one
of the Model 5110’s printed circuit board.
And, as you would guess, once connected
reprogramming takes only a matter of seconds. But unfortunately the programmer
is not something that would be found in a
typical “field shop” or repair facility.
Figure 6. Detail of front panel showing the level meter LEDs
that display the software version. In this example, the software
version is 1.2.
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Model 5110
Mic/Line Input Module
Specifications
Mic/Line Inputs: 2
Input Sensitivity: selectable for line (0 dB), 15, 30
or 45 dB gain
Maximum Input Level: +24 dBu
Type: electronically balanced
Impedance: approximately 3 k ohms
CMRR: 61 dB at 60 Hz
Channel-to-Channel Crosstalk: <–106 dB at
10 kHz
Phantom Power: 48 volts DC, nominal, meets
IEC 61938 P48 standard
Digital Audio Output:
Type: AES3, unbalanced, 75 ohms (“AES3id”)
Sample Rate/Bit Depth: 48 kHz/24
Frequency Response: ±0.2 dB, 20 Hz to 20 kHz
Dynamic Range (A Weighted): 112 dB, input
sensitivity set for Line (0 dB gain), 15 dB gain, or
30 dB gain; 103 dB at 45 dB gain
Distortion: 0.0008% (–101 dB) with output at
–1 dBFS, 22 Hz to 22 kHz, 30 dB gain
Nominal Output Level: –20 dBFS (Model 5110S);
–18 dBFS (Model 5110E)
Analog Audio Outputs: 2
Type:
electronically balanced, capacitor-coupled,
intended to drive balanced loads of 2 k ohms or
greater
Nominal Level:
(Model 5110E)
Maximum Level:
Source Impedance: 200 ohms, nominal, differential
Frequency Response: ±0.5 dB, 20 Hz to 16 kHz;
–1.5 dB at 20 kHz)
Dynamic Range (A Weighted): 107 dB, input
sensitivity set for Line (0 dB gain), 15 dB gain, or
30 dB gain; 102 dB at 45 dB gain
Distortion:
+23 dBu, 22 Hz to 22 kHz, 30 dB gain)
0.002% (–93 dB) with output at
1 (2-channel)
+4 dBu (Model 5110S), 0 dBu
+24 dBu into 10 k ohms
Meters: 2, 7-segment LED, modified VU ballistics
Remote Control Capability: mic gain, phantom
power, pushbutton switch lock out. Requires remote
access module for implementation.
Connectors:
Mic/Line Inputs: 2, 3-pin female XLR, no latch
AES3 Digital Audio Output: 1, DIN 1.0/2.3-
compliant coaxial
Analog Audio Outputs: 1, 5-position male header.
Refer to Appendix B for mating connector details.
DC Input/Data: 1, 4-position male header. Refer
to Appendix B for mating connector details.
Power Requirement: 12 volts DC nominal,
300 milliamperes max; acceptable range 10-18
volts DC, 330 milliamperes max at 10 volts
Dimensions (Overall):
3.75 inches wide (9.5 cm)
1.69 inches high (4.3 cm)
2.30 inches deep (5.8 cm)
Mounting: requires custom implementation;
no mounting method provided. Refer to Appendix A
for details.
Weight: 0.2 pounds (91 g)
Specifications and information contained in this
User Guide subject to change without notice.
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Mic/Line Input Module
Appendix A–Model 5110 Front Panel and Printed Circuit
Board (PCB) Dimensions
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Model 5110
Mic/Line Input Module
Appendix B–Interconnection Details
The required mating receptacles are from the TE Connectivity (formerly AMP) MTA-100
series of IDC (insulation displacement) connectors. This series was selected because of
its low-cost and wide range of offerings. Separate connectors are offered for compatibility
with 22, 24, 26, and 28 AWG (American Wire Gauge) insulated wire. The connector color
indicates its AWG-compatibility. Unfortunately, with flexibility can come some confusion. The
MTA-100 offers a number of different connectors that will work with the Model 5110’s analog audio outputs and DC input/data headers. Before obtaining receptacles it’s important to
determine two things: wire gauge and wiring arrangement.
Analog Audio Outputs
(one connector required)
• For 22 AWG wire this receptacle (red in color) is recommended:
TE Connectivity (AMP) 3-643813-5
Digi-Key part number A31109-ND (www.digikey.com)
Mouser part number 571-3-643813-5 (www.mouser.com)
• For 24 AWG wire this receptacle (white in color) is recommended:
TE Connectivity (AMP) 3-643814-5
Digi-Key part number A31020-N
Mouser part number 571-3-643814-5
DC Input/Data (one connector required)
• For 22 AWG wire this receptacle (red in color) is recommended:
TE Connectivity (AMP) 3-644540-4
Digi-Key part number A31122-ND
Mouser part number 571-3-644540-4
Tools for Connecting Wires to the Mating Receptacles
For applications where just a few Model 5100-Series modules are going to be installed a
manual IDC termination tool is recommended. While requiring a steady hand to achieve
reliable wire connections to the mating receptacles, the price, at less than US$40, is fairly
reasonable:
• “T Handle” termination hand tool:
TE Connectivity (AMP) 59803-1
Digi-Key part number A9982-ND
Mouser part number 571-598031
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Appendix B–Interconnection Details, continued
Tools for Connecting Wires to the Mating Receptacles, continued
For applications where a larger number of Model 5100-Series modules are going to be
installed it’s worth considering a semi-automatic termination tool. The recommended tool
consists of a handle assembly and crimp die for MTA-100 receptacles. The total price for
both, approximately US$300 as of this writing, is steep but the performance that this tool
assembly provides is excellent. We feel that the time savings and reliability of the connections warrants the price when many terminations are going to be made:
• Handle Tool, Pistol Grip:
TE Connectivity (AMP) 58074-1
Digi-Key part number A2031-ND
Mouser part number 571-580741
• Crimp Head Die Assembly for MTA-100 Receptacles:
TE Connectivity (AMP) 58246-1
Digi-Key part number A1998-ND
Mouser part number 571-58246-1
Headers on the Printed Circuit Board
The actual part numbers of the header connectors that are soldered into the Model 5110’s
printed circuit board are provided in this section. But do not order these part numbers with
the intent of interconnecting signals with the Model 5110! We are providing these details
only so that interested technical personnel can have the full background on the Model
5110’s interconnect system. The appropriate mating receptacles are detailed in a previous
section of this Appendix.
• Analog Audio Outputs (one header):
TE Connectivity (AMP) 2-644486-5 (DO NOT ORDER THIS NUMBER!)
• DC Input/Data (one header):
TE Connectivity (AMP) 2-644486-4 (DO NOT ORDER THIS NUMBER!)
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