Agilent Technologies DisplayPort Manual de usuario descargar pdf (Pagina 9)

In addition to providing you with

measurement results, the U7232A

DisplayPort electrical 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 DisplayPort compliance test

specification for a given test assertion.

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 (Eye Diagram

Mask Movement: Find Margin – see

Figure 10 for example.)

Figure 12. The DisplayPort electrical test software results report documents your test,

indicates the pass/fail status, the test specification range, the measured values, and the

margin.

Margin is calculated:

Single-sided specification:

Margin = (Value

Specification

– Value

actual

)/Value

Specification

Double-sided specification:

Margin = lowest of: (Value

Specification_High

– Value

actual

)/Range

Specification

and (Value

Specification_Low

– Value

actual

)/Range

Specification

Margin analysis

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