Agilent Technologies DSO-X 4022A, Руководство пользователя

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USB 2.0 Triggering and Serial Decode
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Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide 479
If the packet type is unknown because the PID is off screen, the Lister
text will have an orange background.
Searching for USB 2.0 Data in the Lister
The oscilloscope's search capability lets you search for (and mark) certain
types of USB 2.0 data in the Lister. You can use the
[Navigate]
key and
controls to navigate through the marked rows.
1 With USB 2.0 selected as the serial decode mode, press [Search] .
2 In the Search Menu, press the Search softkey; then, turn the Entry knob
to select the serial slot (Serial 1 or Serial 2) on which the USB 2.0
signals are being decoded.
3 In the Search Menu, press Search for ; then, select from these options:
• Token Packet — finds token packets with the specified content.
• Data Packet — finds data packets with the specified content.
•
Handshake Packet
— finds handshake packets with the specified
content.
• Special Packet — finds special packets with the specified content.
• All Errors — finds any of the following errors.
• PID Error — finds packet type fields that do not match the check field.
• CRC5 Error — finds 5 bit CRC errors.
•
CRC16 Error
— finds 16 bit CRC errors.
•
Glitch Error
— finds two transitions that occur in half a bit time.
•
Bit Stuff Error
— finds > 6 consecutive ones (low and full speed only).
•
SE1 Error
— finds when SE1 > 1 bit time (low and full speed only).
For more information on searching data, see "Searching Lister Data" on
page 146.
For more information on using the
[Navigate]
key and controls, see
"Navigating the Time Base" on page 75.