Application Examples
Full Speed Signal Quality Tests for Upstream Testing
Specifying the Equipment-Full Speed Signal Quality Tests for Upstream Testing
The following equipment is needed for upstream signal quality check on a low or
full speed device:
Tektronix digital oscilloscope
TDSUSB2 application
TDSUSBF compliance test fixture
Three P6245 or TAP1500 single-ended voltage probes
Typical Equipment Setup-Full Speed Signal Quality Tests for Upstream Testing
To set up the equipment for Full Speed Signal Quality test for Upstream, follow
these steps:
1.
Use the A receptacle to connect the USB unit under test (device) to the
Inrush Droop section of the test fixture.
2.
Connect the Qualifier device to the Adjacent Trigger and Droop section of
the test fixture as shown in the following figure.
3.
Connect Ch1 of the D+
probe to the D+ pins on the Inrush Droop section of
the test fixture.
4.
Connect Ch2 of the D–
probe to the D– pins on the Inrush Droop section of
the test fixture.
5.
Connect the D+ (D- for Low speed) pin of the Adjacent Trigger and Droop
Section of the test fixture to Ch3 as shown in the following figure.
6.
Use the connectors to connect the A pin dongle from the Adjacent Trigger
and Droop section of the test fixture to one port of the Hub 5. Use the A pin
dongle from the Inrush Droop section of the test fixture to another port of
the Hub 5.
7.
Select the measurement and select the
command button to run the
application.
8.
Select OK after acquiring a waveform. Verify that it is a correct waveform.
Note:
Use the standard USB cables to connect between the hubs. Keep the
Discharge switch in the Inrush Droop section in the ON position.
84
TDSUSB2 Universal Serial Bus Measurement Package
Summary of Contents for TDS5032
Page 1: ...TDSUSB2 Universal Serial Bus Measurement Package 077 0015 04 www tektronix com...
Page 12: ......
Page 24: ...Getting Started 10 TDSUSB2 Universal Serial Bus Measurement Package...
Page 32: ...Installation 18 TDSUSB2 Universal Serial Bus Measurement Package...
Page 61: ...Operating Basics TDSUSB2 Universal Serial Bus Measurement Package 47...
Page 76: ...Taking Measurements 62 TDSUSB2 Universal Serial Bus Measurement Package...
Page 88: ...Tutorial 74 TDSUSB2 Universal Serial Bus Measurement Package...
Page 158: ...Application Examples 144 TDSUSB2 Universal Serial Bus Measurement Package...
Page 228: ...Measurement Algorithms 214 TDSUSB2 Universal Serial Bus Measurement Package...
Page 248: ...Glossary 234 TDSUSB2 Universal Serial Bus Measurement Package...
