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USB 2.0 Triggering
To set up the oscilloscope to capture USB 2.0 signals, see
2.0 Signals"
To trigger on a USB 2.0 signal, connect the oscilloscope to the D+ and D-
lines and set up a trigger condition.
1 Press [Trigger].
2 In the Trigger Menu, press the Trigger softkey; then, turn the Entry knob
3 Press the Trigger softkey and use the
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
•
USB Trigger Mode: Start of Packet
on page 471.
to select the serial slot (Serial 1 or Serial 2) on which the USB 2.0
signals are being decoded.
packet, error, or event to trigger on:
•
SOP - Start of Packet — triggers on the sync bit at the beginning of the
packet (low and full speed only).
•
EOP - End of Packet — triggers at the end of the SE0 portion of the EOP
(low and full speed only).
•
Suspend — triggers when the bus is idle for > 3 ms (low and full
speed only).
•
Resume — triggers when exiting an idle state > 10 ms (low and full
speed only).
•
Reset — triggers when SE0 is > 10 ms (low and full speed only).
•
Token Packet — triggers when a token packet with the specified
content is detected.
•
Data Packet — triggers when a data packet with the specified content
is detected.
•
Handshake Packet — triggers when a handshake packet with the
specified content is detected.
USB 2.0 Triggering and Serial Decode
Entry knob to select the USB
29
"Setup for USB
473
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