Application Examples
Chirp Measurement
Specifying the Equipment-Chirp
The following equipment is needed to test Chirp measurement:
Tektronix digital oscilloscope
TDSUSB2 application
TDSUSBF compliance test fixture
Two P6245 or TAP1500 single-ended probes
Typical Equipment Setup-Chirp
The section used for this device test is Device SQ in the test fixture. To set up the
equipment for the Chirp test, follow these steps:
1.
Set the S6 switch to the Init position.
2.
Use a standard length of the USB cable with an A plug on one end and a B
plug on the other end.
3.
Connect one end of the cable to the B receptacle socket connector on the
Init port of Device SQ section and the other end to the host port A socket.
4.
Connect the A receptacle from the Device SQ test port to the unit under test
(device).
5.
Connect the single-ended probes of the oscilloscope to the D+
and D– pins.
6.
Select the measurement and select the
button to run the application.
7.
Run the HS Electrical Test Tool on the connected host. Enumerate the unit
under test (device) and observe the chirp signal on the oscilloscope. Rather
than enumerating the device, an alternative method to generate the chirp
signal is to disconnect and reconnect the unit under test (device) to the port.
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TDSUSB2 Universal Serial Bus Measurement Package
Summary of Contents for TDSUSB2
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 90: ...Tutorial 76 TDSUSB2 Universal Serial Bus Measurement Package...
Page 160: ...Application Examples 146 TDSUSB2 Universal Serial Bus Measurement Package...
Page 230: ...Measurement Algorithms 216 TDSUSB2 Universal Serial Bus Measurement Package...
Page 250: ...Glossary 236 TDSUSB2 Universal Serial Bus Measurement Package...
