Studio Technologies 5154 - Manual (Page 7)

Model 5154 User Guide Issue 3, September 2013
Studio Technologies, Inc. Page 7
Model 5154
Video Generator/Audio De-Embedder Module
that users looking for advanced solutions
such as those provided by the Model 5154
will not typically be working with SD-SDI
signals. But be assured that many HD-SDI
and 3G-SDI formats and rates are sup-
ported, allowing the Model 5154 to be
appropriate for worldwide use.
Coaxial (BNC) Support
Using standard BNC connectors, the
Model 5154 supports one coaxial SDI
input and one coaxial SDI output.
Optical Fiber Support
Factory-implemented options allow the
Model 5154 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 5154 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 5154 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 5154’s
selected SDI input. Audio channels are de-
embedded from the SDI signal without re-
moving or changing the audio group data.
The SDI source is also “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 5154’s
internal SDI generator becomes active.
When a signal is not present on the se-
lected SDI input the module will generate
a high-definition (HD- or 3G-SDI) image
that will serve as a “slate,” ID, or “SDI-ac-
tive” signal. No audio data will be present
in the generated SDI signal as there is no
embedding function provided. The four
digital audio outputs will remain active but
no actual audio signal will be present. (The
audio data will be all “0”s because there is
no audio data being de-embedded.)
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 5154. These alternate
images can supply site- or application-
specific information useful to “downstream”
users. Using a personal-computer graph-
ics 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 5154’s
front panel, allows direct connection of
a standard USB flash drive. If the Model
5154’s firmware (embedded software)
recognizes compatible FAT32 bitmap
(.bmp) files on the USB flash drive they
will be automatically loaded into nonvola-
tile memory. The USB flash drive can then
be removed with the custom images safely
stored within the Model 5154.
One subtle but important configurable
feature has been included for broadcast
applications which use the Model 5154’s