Diagnostic Tools; Frame Detector; Cable Diagnostics - Lightware MMX4x2-HT200 User Manual

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5. Software Control - Lightware Device Controller
5.5. Diagnostic Tools
5.5.1. Frame Detector
The ports can show detailed information about the signal like blanking
intervals and active video resolution. This feature is a good
troubleshooter if compatibility problems occur during system
installation. To access this function, open the port properties window
and click on Frame detector button.
Frame detector window
Lightware's Frame Detector function works like a signal analyzer and
makes possible to determine the exact video format that is present
on the port, thus helps to identify many problems. E.g. actual timing
parameters may differ from the expected and this may cause some
displays to drop the picture.
Frame Detector measures detailed timings on the video signals just
like a built-in oscilloscope, but it is much more easy to use. Actual
display area shows the active video size (light gray). Dark gray area
of the full frame is the blanking interval which can contain the info
frames and embedded audio data for HDMI signals. Shown values are
measured actually on the signal and not retrieved only from the HDMI
info frames.
MMX4x2 series – User's Manual
5.5.2. Cable Diagnostics
The cable diagnostics is a useful tool to determine any cable related
issues in case of TPS connection. The estimated cable length and
the quality of the link are measured periodically and the diagnostic
window shows the values in real-time. If the green bars hit the first line
in the middle they turn into red. It means the number of the errors –
during the extension – is higher than recommended. The link might be
alive but recovering of the received data is not guaranteed.
INFO: Each bar represents a differential line in the CATx cable. The
inappropriate termination of the cable usually causes high error
rates. Check the cable terminations or change the cable.
Reference Values
Value Explanation
10 -10 Excellent image quality
-10 -9
10 Minor error, not recognizable by eyes
-8
10 Sometimes recognizable flash on a special test pattern
-7
10 Small noise can be seen
-6
10 Easy to recognize image error
-5
10 Bad image quality
-4
Above displayed "Video BER < 10 " value means that on average
-10
there is 1 bad pixel after 10 pixels, which means the number of the
10
bit errors is about 1 pixel in every 15 minutes.
INFO: You can find more details about maximum twisted pair cable
distances in the Maximum Extension Distances
Table and Chart Views
Cable diagnostics can be displayed in advanced modes as well. Two
ways are available: table view and chart view. Data can be exported to a
file on clicking on the Export data button.
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Table view of cable diagnostics
Chart view of cable diagnostics