Hardware
2-12
basicCON 4121 – User Manual
Electric surges can harm expensive test equipment and lead to
unreliable test results. Electric isolation protects against electric surges
and can help to suppress dangerous electrical transients. It also
eliminates ground loops, responsible for data errors due to ground
potential differences.
For the
Video Dragon
, all back side connectors as well as the Media
Interface are electrically separated from the signals of connector (9).
This includes the CAN communication interface as well as the digital
inputs and outputs.
When using the galvanically separated interfaces on connector (9),
please ensure to interconnect the separated Ground (isolated)
, with the UUT ground.
The high flexibility of our
Video Dragon
basicCON 4121
requires a
configurable routing of the Video signals. Reason for that are the
different types of the Media Interface Modules, having different color
depths or control signals. Additionally, there is no agreement
regarding the assignment of the Video signals at the transceiver
circuitries at the
Media Interface Module
.
The video bus used internally of the
Video Dragon
is a parallel 24bit
RGB bus with the appropriate pixel clock and the control signals
(VSync, HSync, DE). For the adaptation of the pin assignment and the
color space an FPGA is used, to be configured accordingly.
For configuration, the knowledge of the following parameters of the
system to be tested is required:
Color depth and color space – e.g. 24Bit RGB
Synchronization signals and their polarity
Assignment of these signals at the transmitting or receiving
circuitry of the test system
The following section shows an example assignment of the Video
signals on the internal video bus.
For example, we act on the assumption of an APIX2 system with an
18bit RGB video source, which outputs the video via an INAP375, and
a
Video Dragon
with INAP375R Interface Module.
2.3.13
Galvanic
Isolation
2.3.14
Video signal
Routing