Testing video signal quality from a source, Running the pseudo-random noise test – Quantum Data 881 User Manual
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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
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
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 “
HDMI 1.3 analyzer signal input
HDMI IN 1
HDMI IN 2
*