Preparation for consistency analysis and test of active differential probe in USB2.0

USB2.0 The signal quality test shall be matched with a compliant probe 、 Cable and test fixture ,USB（Universal Serial Bus, Universal serial bus ） It is a new interface technology , It is used to regulate the connection and communication between the computer system and external equipment . Every marketable device , It must be verified that it conforms to USB-IF（USB Implementers Forum） Association certification standards . Let's take a look at the active differential probe in USB2.0 What is involved in the preparation of conformance analysis test

1. Prepare a support USB2.0 Digital oscilloscope for consistency analysis ： according to USB-IF The association demands , The oscilloscope needs to have 2GHz The above bandwidth and 5GS/s The above sampling rate , This use DS70504 Digital oscilloscope for demonstration ;

2. Prepare a computer with USB2.0 Interface computer ： Need to be equipped with USB Association high speed electrical test kit software （XHCI-HSETT）;

3. Get ready USB2.0 Test fixture , This use RIGOL USB2.0 Conformance test fixture （TF-USBD-STP） demonstrate ;

4. Prepare the high-speed to be tested USB equipment , The interface used this time is USB2.0 Of U Disk for demonstration ;

5. Get ready PVA8700 High speed active differential probe ;

6.USB-A Male head turn USB-B Two male cables .

Attach the clamp

1. Ensure that the fixture Test The switch is off , Short the clamp short-circuit terminal ;

2. Put one USB-A Male head turn USB-B The male cable is connected to the computer USB2.0 Interface with the input of the test fixture ;

3. Put the other one USB-A Male head turn USB-B The male cable connects the power supply equipment and the power end of the test fixture （ The power supply shall be 5V）;

4. The high speed to be tested USB Insert the device into the device end of the test fixture ;

5. use PVA8700 The differential probe is connected to the differential probe connecting end of the test fixture .

▲USB2.0 Conformance analysis test fixture

The above is the active differential probe in USB2.0 Preparation for conformance analysis test , If you still have other problems in use , Welcome to puke Technology www.prbtek.com