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254 Chapter 9 Analyzing Digital Sources and Cables
Testing video signal quality from a source
The Analyzer can test the quality of video sources and report errors to the front panel
display or as reports.
If the HDMI/DVI source can generate Quantum Data’s BCM pseudo-random noise, the
Analyzer can compare the pseudo-random noise from the source with a reference that you
specify using the Pseudo-Random Noise test.
In cases where the HDMI/DVI source device cannot generate pseudo-random noise, the
Analyzer can test and analyze the transmission quality of the external HDMI/DVI source
using a Pixel Error (delta error) test.
You can also view the pixel color components (R,G,B) for a pattern transmitted by the
source. The values shown in the analyzer can be compared against what the source is
sending.
Instructions for testing using the Pseudo-Random Noise, Pixel Error, and ViewPix tests
are given below. For instructions on implementing pseudo-random noise in the source
device, see “
Controlling the analyzer with Signal Analysis Module” on page 281.
The procedures below provide instructions for running the test both through the front panel
and the command line.
Running the Pseudo-Random Noise test
The Pseudo-Random Noise test can be used to analyze pseudo-random noise generated
by an HDMI/DVI source device. Your source device must have the QDI-BCM
pseudo-random noise algorithm implemented. For instructions on implementing
pseudo-random noise in the source device, see “Controlling the analyzer with Signal
Analysis Module” on page 281.
To analyze pseudo-random noise from an external source through the front panel:
1. Connect the HDMI/DVI transmit device to an HDMI IN connector on the generator.
2. Press the Interface key repeatedly until the following menu appears:
3. Choose the connector to which the transmit device is connected by pressing the
adjacent soft key.
4. If desired, monitor the video signal received on the HDMI IN connector (see “Monitoring
HDMI 1.3 analyzer signal input” on page 239).
HDMI IN 1
HDMI IN 2
*