Studio Technologies 5152 V.1 - Manual (Page 24)

Issue 5, September 2013 Model 5152 User Guide
Page 24 Studio Technologies, Inc.
Model 5152
Video Generator/Audio Embedder Module
indicates that the signal is being routed to
the SDI output and the internal SDI genera-
tor is not active. SDI signals that comply
with most HD (1.485 Gb/s nominal) and
3G (2.97 Gb/s nominal) standards are
compatible. Refer to the Specifications sec-
tion of this guide for a list of the supported
standards.
The Model 5152 always provides an ac-
tive SDI signal on the coaxial (BNC) output.
Some Model 5152 versions also provide an
optical output. This is accomplished at the
factory by installing one of a variety of avail-
able SFP optical modules in the back-panel
SFP “cage.” If an optical output is present it
will always be active and provide an identi-
cal copy to the signal present on the coaxial
(BNC) output.
If a valid SDI signal is not connected to the
selected SDI input the stored image will be
present on the coaxial (BNC) output and, if
present, optical output. Depending on the
stored format and rate values, the output
will be either a 1280 x 720 pixel (“720”) or
1920 x 1080 pixel (“1080”) fixed image.
Stored Images
When a valid signal is not connected to the
selected SDI input, the module generates
one of two fixed images. The two images,
one “720” and one “1080,” are stored in
nonvolatile memory within the Model 5152.
From the factory two images are pre-load-
ed. The two are quite different from one
another with each having a unique photo
background and overlaid text. The overlaid
text provides support details on how alter-
nate custom images can be created.
It’s expected that these pre-loaded images
will be replaced with application-specific
images. They can be easily created and
what they consist of is limited only by one’s
imagination. Refer to the Technical Notes
section of this guide for details.
Transitions between External
and Internal SDI Signals
This paragraph applies when the Model
5152 has been configured for normal SDI
input mode. Whenever a valid SDI signal
is connected to the selected Model 5152
input it will immediately be routed to the
coaxial (BNC) and, if present, optical SDI
outputs. The situation is a little different
when a valid signal that’s been connected
to the selected SDI input is subsequently
removed. When the Model 5152 detects
that an SDI input signal is no longer pres-
ent the SDI output may switch to an im-
age with a solid-gray color. Depending on
the module’s configuration this color may
remain active for up to seven seconds. This
solid-gray image provides a benign warn-
ing to users that the normal SDI source is
no longer present.
During this time period it’s expected that
any on-air use of the Model 5152’s output
can be terminated without alerting viewers
that anything is amiss. This solid-gray im-
age can also be helpful as a marker when
editing recorded video. After the configured
interval has elapsed the internal generator
will output either the “720” or “1080” stored
image.
It’s also possible that the Model 5152 has
been configured to not output the solid-
gray video signal. In this case, when the
module detects that an SDI signal is no
longer present on the SDI input, the SDI
output will directly switch to the stored
image.