Studio Technologies 5152 V.3 - Manual (Page 14)

Issue 2, June 2013 Model 5152 User Guide
Page 14 Studio Technologies, Inc.
Model 5152
Video Generator/Audio Embedder Module
When the three switches are in their off
(up) position no embedding takes place
and any embedded audio groups that are
present on the connected SDI input will
pass through the module. While this mode
will typically not be used it can prove use-
ful in certain situations. For example, it can
be used during troubleshooting to disable
the Model 5152’s embedding function and
allow an SDI input to pass through the
module completely unchanged. Test sig-
nals can be confirmed as passing through
the module correctly and terminating on a
downstream piece of equipment. Turning
off embedding can also be useful when,
in a special application, all the groups
associated with an SDI input need to
remain embedded in the SDI input signal.
Four of the embedding choices are pro-
vided for applications that need to use just
two of the Model 5152’s four digital audio
inputs. Digital audio inputs 1 and 2 (which
are associated with four channels of audio)
can be embedded into SDI group 1, 2, 3,
or 4. When one of these four choices is
selected digital audio inputs 3 and 4 are
not used and are effectively disabled.
The last three embedding choices are
provided when all four of the Model 5152’s
digital audio inputs (eight audio channels)
are to be used. The choices allow digital
audio inputs 1 and 2 to be embedded into
group 1, 2, or 3 while digital audio inputs 3
and 4 will be embedded into group 2, 3,
or 4, respectively.
SDI Output Image Format/
Rate Mode
Switch 5 on the FPGA board is used to
configure how the format and rate of the
internal SDI generator is selected. (The in-
ternal SDI generator creates the solid-gray
video image and plays back the custom
“720” and “1080” images.) When the switch
is in its off (up) position the format and rate
will automatically “follow” that of the con-
nected SDI input. This allows the Model
5152 to automatically “learn” the specific
format and rate used by a broadcast facility
or live event.
The format and rate of the internal SDI
generator can also be “locked” so that it
will not change. When switch 5 is in its
down (on) position the format and rate
that’s currently being used cannot be
changed, no matter what signal is con-
nected to the SDI input.
While the format and rate is “locked” when
switch 5 is down, it’s not difficult to change
the Model 5152 to a different “locked”
format and rate. Begin by changing the
mode back to automatic by placing switch
5 on the FPGA board to off (up). Then con-
nect (or leave connected) an SDI signal
that has the desired format and rate. After
waiting a minimum of five seconds return
switch 5 to its on (down) position. The new
format and rate values will be saved in
nonvolatile memory and will serve as the
new format/rate parameters.
Figure 8. SDI Output Image Format/Rate Mode
Settings