Technical data

36 DSOX4USBSQ USB 2.0 Signal Quality Analysis Application Electrical Testing Notes

2 Device Signal Quality Testing

Device Low Speed Compliance Test Packets

To set up the Host computer to transmit compliance test packets, perform

these steps:

1 Invoke the HS Electrical Test Tool software on the Hi- Speed Electrical

Test Bed computer.

2 Select Device and click the TEST button to open the Device Test dialog

box.

Hi-Speed Hub

Full Speed Hub

Low-Speed

Device

Under Test

Probe D- and D+ in

Device Under Test Path

Host

(Self-powered) Hub 1

(Self-powered) Hub 2

(Self-powered) Hub 3

(Self-powered) Hub 4

(Self-powered) Hub 5

5m Cable

SQiDD

Adjacent

Low-Speed

Device

5m Cable

Probe D- in

Adjacent Device Path

D- D+ D-