Studio Technologies 5152 User Manual V.2
Model 5152
Video Generator/Audio Embedder
User Guide
Issue 4, September 2013
This User Guide is applicable for
Model 5152 modules with the following order codes:
M5152, M5152-01, M5152-02, M5152-03X, and M5152-04X
with serial numbers 00151 and later
and firmware versions
MCU 2.1 and 2.2 (m5152.s19) and FPGA 2.1 and 2.2 (m5152.bit)
Module
Copyright © 2013 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50185-0913, Issue 4
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Video Generator/Audio Embedder
Model 5152
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Table of Contents
Introduction ................................................................... 5
Installation .................................................................... 9
Configuration ................................................................ 14
Operation ...................................................................... 21
Technical Notes ............................................................ 26
Specifications ............................................................... 33
Appendix A—Model 5152 Versions .............................. 34
Appendix B—DC Input/Data and GPI/GPO
Interconnection Details ................................................. 35
Appendix C—Model 5152 Front Panel and
Printed Circuit Board (PCB) Dimensions ...................... 37
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Issue 4, September 2013 Model 5152 User Guide
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Introduction
The Model 5152 Video Generator/Audio
Embedder Module is a unique device suited
for a variety of custom broadcast, postproduction, industrial, and corporate multimedia installations. As a member of the
5100-Series of modules, the Model 5152’s
compact size belies its powerful video and
audio feature set. At its most basic, the
Model 5152 provides the ability to embed up
to eight audio channels (four AES3 digital
audio “pairs”) into an SMPTE®-compliant
HD- or 3G-SDI video “stream.” Unlike most
stand-alone embedder products, Model
5152 embedding operation does not require
an external source of SDI to be connected.
Advanced circuitry within the Model 5152
supports the generation of a broadcaststandard high-definition SDI signal. And
rather than reproducing a fixed test pattern,
the Model 5152 has the capability to store
and output two custom video images. The
images, one for “720” and one for “1080,”
are based on bitmap (.bmp) files that can
be created using a personal computer’s
graphics program.
Module
that an SDI output signal is always sent to
equipment further along the signal chain.
The Model 5152’s video signal generation
capability can be extremely useful, serv
ing as both a “keep-alive” signal as well as
allowing a detailed graphics image to be
displayed for identification purposes. When
a valid HD- or 3G-SDI signal is connected
to the module’s input it will pass through,
unchanged, to the module’s SDI output.
Only when an input is not present will the
custom image be generated. The format
and rate of the custom image will match
that of the previously-connected SDI input
signal. This “learning” capability allows a
Model 5152 to automatically adapt to the
SDI format and rate utilized by a specific
facility or application.
An alternate operating mode can be selected, allowing the Model 5152 to serve
as a dedicated video signal generator. In
this mode an SDI signal connected to the
module will serve as an external timing
reference.
General Highlights
For convenience, the .bmp files are loaded
into the module’s nonvolatile memory via a
standard USB flash drive. The appropriate
“720” or “1080” image is automatically connected to the SDI output whenever an SDI
Applications for the Model 5152 include
sports broadcasting booth packages,
“POV” (point-of-view) remote-controlled
camera systems, stadium audio/video
interface (I/O) locations, and government/
input signal is not present. This ensures
Figure 1. Model 5152 Video Generator/Audio Embedder Module front and rear views
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corporate facilities. The module’s performance is completely “pro” with video and
audio quality, reliability, and installation flexibility matching that of much larger-scale
equipment.
For operation the Model 5152 only requires
connection of a few signals. These consist
of SDI inputs and outputs, up to four unbalanced digital audio sources, an external
source of nominal 12 volts DC and, optionally, two wires associated with a local
RS-485 data bus. Some applications may
also utilize the general-purpose input (GPI)
and general-purpose output (GPO) functions (available only on modules with serial
numbers 00251 and later). Coaxial SDI
input and output support is standard. Opti
cal input and output support is optional. The
acceptable DC input voltage range is 10 to
18, allowing a variety of power sources to
be utilized.
The Model 5152 uses standard connectors
for fast, convenient interfacing. Coaxial SDI
input and output signals use BNC connectors. An optional video SFP fiber optic
module can be installed at the factory. The
module supports interconnection of singlemode optical fibers using LC plugs. Digital audio signals interface with the Model
5152 by way of a 9-pin D-subminiature
connector. The DC power input and data
bus connections use a 4-position, 0.1-inch
header. The GPI and GPO connections use
a 3-position, 0.1-inch header. Low-cost IDC
(insulation-displacement connector) mating
sockets allow simple interconnection with a
variety of wire gauges. Twelve status LEDs
offer users both performance confidence
and troubleshooting assistance.
The Model 5152 is compatible with the
Studio Technologies’ Model 5190 Remote
Access Module. This will allow remote
configuration, monitoring and control, via an
Ethernet connection, of key module operating and status parameters. A local RS-485
data bus allows up to 16 of the 5100-Series
modules to be connected to a Model 5190.
Several Model 5152 operating parameters
can be configured to meet the needs of
specific applications. A USB flash drive
along with several DIP switches, are used
to convey the configuration to the module.
A simple text file that reflects the desired
configuration is created and stored on the
USB flash drive. When inserted into the
appropriate socket on the Model 5152 the
file is read and stored. Updating the Model
5152’s firmware (embedded software) is
also possible using a USB flash drive loaded with factory-supplied files.
Model 5152 Video Generator/Audio Embedder Modules do not include a mounting
enclosure or chassis. They are intended
for mounting in custom 19-inch rack panels, equipment boxes, broadcast furniture,
“NEMA” I/O boxes, or other specialized
enclosures. It is expected that integration
firms will create applications that use Model
5152 modules as part of complete broadcast, production, corporate, and government
solutions. Sophisticated users will be able
to easily create “one-off” solutions to solve
unique challenges.
SDI Inputs and SDI Outputs
High-definition SMPTE-compatible SDI signals with data rates of 1.485 Gb/s nominal
(HD-SDI) and 2.97 Gb/s nominal (3G-SDI)
can be connected. Virtually all of the commonly-utilized “720” and “1080” formats are
supported. Standard-definition SDI signals
with a data rate of 270 Mb/s nominal (SDSDI) are not supported. It was felt that users
looking for advanced solutions such as
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those provided by the Model 5152 will not
typically be working with SD-SDI signals.
But be assured that many HD-SDI and
3G-SDI formats and rates are supported,
allowing the Model 5152 to be appropriate
for worldwide use.
Coaxial (BNC) Support
Using standard BNC connectors, the
Model 5152 supports one coaxial SDI
input and one coaxial SDI output.
Optical Fiber Support
Factory-implemented options allow the
Model 5152 to support SDI signals that
are transported using single-mode optical
fibers. Using video SFP modules a range
of optical input, output, and transceiver
capabilities can be supported. For a list
of available Model 5152 versions refer to
Appendix A.
The standard 1310 nanometer optical
transmit wavelength is available, as are
the more-esoteric CWDM wavelengths. A
module that includes an optical SDI output
will always have its optical output active,
transporting the same SDI data as that
present on the coaxial (BNC) output. When
a Model 5152 has been provided with an
optical SDI input a configuration choice
selects whether it, or the coaxial (BNC)
input, is active.
Video Generation Capability
During typical operation an HD- or 3G-SDI
signal is connected to the Model 5152’s
selected SDI input. It’s then “passed
through” to the module’s SDI output(s)
and on to the next part of the signal chain.
But what happens when the external SDI
signal is not present? That’s when the
Model 5152’s internal SDI generator be
-
comes active. When a signal is not present
on the selected SDI input the module will
generate a high-definition (HD- or 3G-SDI)
image that will serve as a “slate,” ID, or
“SDI-active” signal. This SDI signal also
allows the audio embedding function to
remain active.
From the factory two bitmap (.bmp) image
files are stored in nonvolatile memory. One
file is used for generating the image for
1280 x 720 pixel formats and the other for
1920 x 1080 pixel formats. But alternate
bitmap image files can be created and
stored in the Model 5152. These alternate
images can supply site- or applicationspecific information useful to “downstream”
users. Using a personal-computer graphics program, such as Microsoft® Paint® or
Adobe® Photoshop®, generating custom
images and storing them in the appropriate
bitmap format is a simple matter.
A USB port, located on the Model 5152’s
front panel, allows direct connection of
a standard USB flash drive. If the Model
5152’s firmware (embedded software)
recognizes compatible FAT32 bitmap
(.bmp) files on the USB flash drive they
will be automatically loaded into nonvolatile memory. The USB flash drive can then
be removed with the custom images safely
stored within the Model 5152.
One subtle but important feature has
been included for broadcast applications
which use the Model 5152’s SDI output(s)
“on-air.” When an SDI signal is removed
from the module’s selected SDI input, the
Model 5152 will output a few seconds
of solid-gray color before the stored image appears. This will help to ensure that
technicians or operators will be visually
“warned” that the module’s input signal has
been lost and that the custom image will
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soon be taking its place. It’s hoped that the
gray video image will be innocuous for onair viewers yet different enough to encourage operators to switch the module’s output
away from being “on air.”
A unique feature of the Model 5152 is its
ability to automatically adapt to the format
and rate of a connected SDI signal. This
allows the custom image to be output at
the same format and rate as that used by
the associated network, local facility, or
event. If, for example, a connected input
is “1080i/59.94” then the Model 5152 will
automatically detect and store that information. From then on whenever an SDI
input signal is not present the internal
generator will output the custom image at
“1080i/59.94.” Changing the format and rate
of the generator only requires connection of
an SDI signal with the desired characteristics. (A minimum required connection time
helps to ensure that an accidental format/
rate change won’t occur.) However, there
may be situations where maintaining the
format and rate of the internally-generated
signal is important. To support this condition
one configuration choice allows the automatic format/rate selection function to be
disabled.
Video Generation with External
Reference
Some applications may benefit from the
Model 5152 serving as a full-time stand
alone video generator. A configuration
choice helps to support such applications
by using the selected SDI input only as a
timing reference. Unlike typical operation,
when selecting this operating mode a signal
connected to the selected SDI input would
not pass through to the SDI. Its rate, format,
and specific timing characteristics would
be used as a reference for the internally-
generated video output. Note that bi-level
or tri-level analog timing reference signals
are not supported. Only a HD-SDI or 3GSDI signal can serve as a reference signal
for the Model 5152.
Audio Embedding
The Model 5152 allows four stereo digital
audio signals to be embedded into the SDI
output signal. The eight channels of audio
will always be embedded, whether or not
an SDI source is connected to the module.
Nine configuration choices allow flexibility
as to where the digital audio inputs will be
embedded into the SDI output signal. A
range of applications can be supported by
taking advantage of the module’s ability to
embed into groups 1, 2, 3, or 4.
The four digital audio inputs are 75 ohms,
unbalanced, and follow the AES3 standard. They are intended for use with broadcast-standard “24-bit, 48 kHz” digital audio
signals. Advanced sample-rate-converter
circuitry ensures excellent performance
with signals that are asynchronous with
each other and the Model 5152’s internal
timing.
The Model 5152’s digital audio inputs are
directly compatible with the digital audio
output provided by the Studio Technologies’ Model 5110 Mic/Line Input Module.
Up to four Model 5110 modules can be
directly connected, supporting eight mic/
line inputs.
A major Model 5152 feature is its ability
to embed audio into the SDI output signal
whether or not an SDI input signal is present. If a valid SDI signal is connected then
the Model 5152 will embed audio data into
that data stream. If an SDI signal is not
connected embedding will continue but
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now will be associated with the custom
image. In this way embedded-audio transport will always be supported.
When audio is being embedded into an
externally-connected SDI signal it will replace any incoming embedded audio that’s
already present. However, any embedded
audio present on groups that are not being
embedded by the Model 5152 will correctly
“pass through” to the SDI output. This is
important when SDI input signals that
already include embedded audio, such as
from portable ENG-type cameras, are connected. Such devices typically embed two
or four microphone audio channels into
group 1, which need to pass through the
Model 5152 without interference.
It’s important to note that when changing
from an external SDI signal to the internal
generator (or vice-versa) the SDI output,
including embedded audio, will momentarily lose timing and some video and audio
“glitches” may be present. For the intended
Model 5152 applications this should
not prove to be an issue but is worth
mentioning.
GPI and GPO
Model 5152 modules with serial numbers
00251 and later offer a general-purpose
input (GPI) and a general-purpose output (GPO) function. The GPI allows the
connection of a switch or contact closure
to control the on/off status of the Model
5152’s audio embedder function. Future
versions of the Model 5152’s firmware may
implement other GPI-controlled actions.
The GPO function provides an indication
of the status of the selected SDI input. It’s
intended that the GPO will be connected
to an LED indicator. A configuration choice
selects whether the GPO is active (+3.3
volts) when the selected SDI input is valid
or active when the selected SDI input is
invalid. (This can also be described as active “high” or active “low”). This allows, for
example, a green LED to light whenever
a valid signal is connected to the selected
SDI input, thus providing an “input good”
indication. Alternately, a red LED could
light when the selected SDI input is not
active, providing an “input fail” indication.
Installation
Integration of the Model 5152 into a selected application should prove quite simple,
only connecting SDI input and output signals, digital audio sources, as well as
DC power is required. Some applications
will also require connection to the module’s
data bus, GPI, and GPO functions. The
coaxial (BNC) input and output connections are compatible with most HD-SDI
and 3G-SDI signals. If the specific Model
5152 being installed also includes optical support one or two single-mode fiber
interconnections will be made. The fiber
connections utilize miniature LC plugs.
Up to four AES3-compliant unbalanced
digital audio signals can be connected
by way of a 9-pin D-subminiature (DE-9)
connector. Each of these four digital audio
signals supports two channels of audio.
The DC power source is nominal 12 volts
with an acceptable range of 10 to 18 volts.
It’s possible that the module will be part of
a local RS-485 data bus that’s associated
with a Studio Technologies’ Model 5190
Remote Access Module. If so, two ad
ditional wires are required to connect the
module to the data bus. GPI and GPO connections are made using a 3-pin header.
-
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After all the connections have been completed the module can then be secured
into the designated mounting location.
Coaxial (BNC) SDI Output
The Model 5152 provides an SDI output
that utilizes a broadcast-standard BNC
socket. This output is referred to as the coaxial (BNC) SDI output. Refer to Figure 2
for a detailed view of the connector’s loca
tion on the rear of the module. The coaxial
(BNC) output, depending on operating
conditions, will be either a SMPTEcompliant HD-SDI (1.485 Gb/s nominal) or
a 3G-SDI (2.97 Gb/s nominal) signal. The
exact format/rate combinations supported
by the Model 5152 are listed in the Specifications section of this guide.
Coaxial (BNC) SDI Input
An SDI source can be connected to
the Model 5152 by way of a broadcaststandard BNC connector. This is referred
to as the coaxial (BNC) SDI input. Refer
to Figure 2 for a detailed view of the con
nector’s location on the rear of the module.
The coaxial (BNC) input is compatible
with SMPTE-compliant HD (1.485 Gb/s
nominal) and 3G (2.97 Gb/s nominal) SDI
signals. It is not compatible with standard
definition SD-SDI (270 Mb/s nominal) sig
nals. The exact format/rate combinations
supported by the Model 5152 are listed in
the Specifications section of this guide.
A configuration setting must be made for
the coaxial (BNC) SDI input to be active.
Refer to the Configuration section of this
guide for details.
Optical SDI Output
This section applies only when the specific Model 5152 module being installed
was configured at the factory to provide an
optical output. A video SFP (small formfactor pluggable) optical module is used to
provide the optical SDI output. A range of
SFP modules can be installed in the “cage”
at the back of the Model 5152. These
Figure 2. Detailed rear view of the Model 5152 Video Generator/Audio Embedder Module showing the
MCU and FPGA boards
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include transceiver modules that have both
an optical output (transmitter) and an optical input (receiver), as well as output-only
(transmitter) modules. The technical characteristics of the optical output will depend
on the specific module installed. The most
common transceiver or output-only SFP
module used in the Model 5152 will have
an FP (Fabry-Perot) laser emitting “light” at
a wavelength of 1310 nanometers. Other
modules can utilize a higher-performance
DFB (distributed feedback) laser that is
manufactured to produce light at one of the
18 CWDM wavelengths. (For broadcast applications, the common first-utilized CWDM
wavelengths are often 1490 and 1550
nanometers.)
An LC plug terminated on a single-mode
optical fiber is used to mate with the SFP’s
optical output. When referenced to the
front of an SFP transceiver or output-only
SFP module the optical output is located
on the SFP module’s left side. To indicate
the optical output port a graphic arrow icon
pointing “out” may be present on the top of
the module. Refer to Figure 2 for a detailed
view. When terminating the LC plug with the
socket on the SFP module be certain that
the plastic plug’s locking tab is fully en
gaged into the slot of the SFP module. This
will help prevent the LC plug from becoming disconnected due to physical stress or
vibration on the fiber. Also ensure that the
end (“face”) of the plug’s ferrule has been
cleaned using appropriate methods.
Note that as of the time this user guide
was written the Model 5152 supports only
single-mode optical cable. Contact Studio
Technologies should support for multi-mode
fiber be required.
The Model 5152 module should remain
without power whenever its optical output
has not been terminated. This ensures that
the optical energy will not project into free
space and possibly into the eyes of installation personnel. The optical output power
of video SFP modules selected by Studio
Technologies adheres to the class 1 laser
standard. As such, they do not emit sufficient power to be considered hazardous.
But best safety practices require that the
optical output port and all unconnected fiber
ends not be directly viewed.
No configuration setting is required to
activate the optical output. It is always active and will contain the same SDI data as
that found on the coaxial (BNC) output. As
such there is no problem in simultaneously
connecting to both the optical and coaxial
(BNC) outputs.
Optical SDI Input
If supported by the specific Model 5152
module being installed, an HD- or 3G-SDI
signal transported on a single-mode optical fiber can be connected. For an input to
be present a video SFP transceiver or a
receive-only SFP module must have been
installed in the SFP “cage” in the back of the
unit. The optical receiver circuitry in an SFP
module is “broadband” and doesn’t need
to receive a specific wavelength of singlemode optical signal for correct operation. As
long as the optical signal has a wavelength
between 1250 and 1650 nanometers and
meets the applicable SMPTE standards it
will be recognized correctly.
A single-mode optical fiber terminated with
an LC plug can be connected to the receive
port on the SFP module. This port is on the
right side when looking directly at the back
of the SFP module. Typically there will be a
graphic arrow icon pointing “in” on the top of
the module. Refer to Figure 2 for details on
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the location of the SFP module. Ensure that
the LC plug fully “mates” with the receive
port and its tab is locked into the slot of the
SFP module.
A configuration setting must be appropriately made to enable the optical SDI input.
There is no automatic switching between
the optical and coaxial (BNC) SDI inputs.
Only one of the two SDI inputs can be
selected and active at a time. Refer to
the Configuration section of this guide
for details.
Digital Audio Inputs
Up to four unbalanced digital audio sources
can be connected to the Model 5152.
Following SMPTE standards, they will be
embedded into the externally-supplied or
internally-generated SDI signal. The four
serial digital audio sources represent eight
audio channels, two per serial digital audio
signal. The sources must comply with the
AES3 standard for unbalanced digital audio
signals. These have a characteristic impedance of 75 ohms and a nominal signal level
of 1 volt peak-to-peak. This type of signal
was previously referred to as being an
AES3id digital audio signal.
The connected signals do not have to be
synchronized with each other or with the
associated SDI input and output signals.
This is because each of the Model 5152’s
digital audio input circuits has a samplerate-conversion (SRC) function associated
with it. Digital audio signals with a sample
rate of 32 to 48 kHz and a bit depth of
up to 24 are compatible. The nominal reference signal level of the connected digital
audio source can follow either the AES
(–20 dBFS) or EBU (–18 dBFS) standard.
This is because the embedding function
simply takes the incoming digital audio
“bits” and inserts them into the correct
data locations in the SDI signal.
An interconnecting cable assembly must
be prepared with a 9-pin male D-subminiature plug (DE-9M) on the end intended
for connection with the Model 5152. This
cable will interface the digital audio signal
sources with the 9-pin female “D-sub”
(DE-9F) connector located on the back
of the Model 5152. Refer to Figure 3 for
detailed connection information.
It’s expected that four independent pieces
of coaxial cable will be used to bring the
unbalanced digital audio signals into the
DE-9M plug, so using miniature coaxial cable is highly recommended! The connector
pin assignments were carefully selected
to assist in making these “hot” and “shield”
connections.
6 Input 1 (audio channels 1/2)
1 Shield 1
7 Input 2 (audio channels 3/4)
2 Shield 2
8 Input 3 (audio channels 5/6)
3 Shield 3
9 Input 4 (audio channels 7/8)
4 Shield 4
5 Not Used
Notes:
1) Connector type on Model 5152 is a 9-pin
D-subminiature female (DE-9F). Installer must
provide a 9-pin D-subminiature male (DE-9M).
Connector uses 4-40 threaded inserts for
locking with mating plug.
2) All inputs AES3 unbalanced digital audio;
75 ohm/1 Vpp (formerly AES3id).
3) Total of eight audio channels (four “stereo”
pairs).
Figure 3. Digital Audio Input Connections
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