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802BT/802R Video Test Generator User Guide 135
To verify the analyzer’s pseudo-random noise analysis capability:
1. Using a terminal emulator, establish a terminal connection with the generator. Refer to
“Setting up a terminal connection with the generator” on page 14.
2. Enter the following commands to configure the generator to output a digital signal
(HDMI or DVI):
SROP 2 4
This removes analog friendly mode and configures the generator to output either a DVI
or HDMI signal depending on the interface hardware the generator is equipped with
(DVI or HDMI).
3. (optional) Enter the following commands to set the status display mode:
SROP 8
4. Connect an HDMI/DVI cable between the HDMI/DVI Tx and Rx connectors on the
generator.
5. Enter the following commands to select the signal format and image.
FMTL TEST165 // loads the TEST165 format
Note: For HDMI testing load the TEST81 format.
FMTU // applies the TEST165 or TEST81 format to the generator
IMGL PRN_9 // loads the PRN_9 image
IMGU // activates the image in the generator
6. Enter the following commands to set the pseudo-random noise parameters.
PNSF 0 // selects internal timing source for pseudo-random noise
PNST 1 // specifies QDI-BCM algorithm
PNSA 1 // sets pseudo random noise to be calculated each pixel
PNSM 0 // sets pseudo-random noise test to “single-shot”
PNAU // loads the generator with pseudo-random noise settings
Note: The test will stop automatically if configured to run in the single or multi-shot
mode. If you initiate the test in the continuous mode, you will have to enter a carriage
return to halt the test after PNAU is invoked.
7. Enter the following commands to view the results of the test.
GPER? // returns the pixel error rate in errors per billion
GNPT? // returns the number of pixels measured in billions
GCET? // returns the number of bad pixels for R, G, B components
GFED? // returns information about the first error encountered
Analyzing pixel data (delta error patch)
The following is an example of using commands to test an HDMI/DVI transmit device’s
pixel data using a delta error patch test.