Agilent Technologies U7242A Instrukcja Użytkownika Pobierz pdf (Strona 3)

3

Features

The U7243A USB 3.0 electrical test

software offers several features to

simplify the validation of USB 3.0

designs:

• Automated 1M Unit Interval (or

greater) testing for highest

accuracy

• Results consistent with USBIF

SigTest software utility

• Test setup wizard for ease-of-use

• Wide range of electrical tests

• USB 3.0 SigTest clock recovery

algorith

• Automated scope measurement

setup

• Test results report generation

• Pass/fail margin analysis

• TP1 eye pattern compliance test

mask

• TPO (transmitter) eye pattern test

mask

• CTLE signal correction for TP1 tests

With the USB 3.0 electrical test

software, you can use the same

oscilloscope you use for everyday

debugging to perform automated

testing and margin analysis based on

the USBIF specified tests.

USB 3.0 compliance testing

To pass signal quality testing at

a USBIF-sponsored compliance

workshop, your product must

successfully pass “Gold Suite” testing,

based on the USBIF SigTest application.

The SigTest application tests your

device against the minimum signal-

quality performance requirements

for USB 3.0. If you are developing

receivers and transmitters for add-in

boards and system motherboards,

the USB 3.0 electrical test software

helps you execute all the SigTest tests

and additional oscilloscope already

completed tests.

While SigTest tests provide a good

overview of USB 3.0 electrical signal

quality, they address only a small

subset of the electrical compliance

measurements specified in the USB 3.0.

The SigTest application also provides

minimal reporting capability with pass/

fail indication and measurement values,

and has limited debugging capabilities

to decipher eye mask violations or

excessive jitter.

For USB 3.0 measurements, the

U7243A software automatically

calculates deterministic jitter and total

jitter at 10-12 BER. Random jitter is

also reported for completeness and

a voltage margin “eye” diagram is

included in the final HTML report. DJ

and TJ values are specified in the USB

3.0 specification and are required for

compliance verification.

USB 3.0 supports the data rate of 5.0 GT/s as shown above (~3.5 dB de-emphasis)

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