10 | Keysight | N5399C, N5399D HDMI Electrical Performance Validation and Compliance Software - Data Sheet
Margin Analysis
Extensibility
In addition to providing you with measurement results, the HDMI
test software provides a report format that shows you not only
where your product passes or fails, but also reports how close
you are to the limits specified for a particular test assertion.
You select the margin test report parameter, which means you
can specify the level at which warnings are issued to alert you
to the electrical tests where your product is operating close
to the official test limit defined by the HDMI compliance test
specification for a given test assertion.
You may add additional custom tests or steps to your application
using the user-defined application (UDA) development tool
(www.keysight.com/find/uda). Use UDA to develop functional
“Add-Ins” that you can plug into your application.
Add-ins may be designed as:
– Complete custom tests (with configuration variables and
connection prompts)
– Any custom steps such as pre or post processing scripts,
external instrument control and your own device control
Margin is calculated:
Single-sided specification:
Margin = (ValueSpecification – Valueactual)/ValueSpecification
Double-sided specification:
Margin = lowest of:
(ValueSpecification_High – Valueactual)/RangeSpecification
and
(ValueSpecification_Low – Valueactual)/RangeSpecification
Eye margin: Another method of evaluating the eye is provided
by sweeping the eye horizontally with the specified mask and
determining the last locations on the left and right portions of
the interior eye where there are no violations in the mask. The
distance from the center mask location is a measure of design
margin and is reported as eye margin if that eye mask mode is
chosen in the configuration screen.
Figure 13. Importing a UDA Add-In into your test application.
Figure 12. The HDMI software results report documents your test,
indicates the pass/fail status, the test specification range, the measured
values, and the margin.
Figure 14. UDA Add-In tests and utilities in your test application.
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