Usb Trigger - Agilent Technologies InfiniiVision 5000 Series User Manual

4
Triggering

USB Trigger

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USB trigger will trigger on a Start of Packet (SOP), End of Packet (EOP) signal, Reset
Complete (RC), Enter Suspend (Suspend), or Exit Suspend (Exit Sus) on the differential
USB data lines (D+ and D-). USB Low Speed and Full Speed are supported by this trigger.
D+,–
Bus Idle
D–,+
SOP
1 Press [Save/Recall]&Default Setup.
2 Press the [Label] key to switch labels on.
3 Turn on any analog or digital channels that you will be using for the USB signals.
4 Press the [More] key in the Trigger section of the front panel, rotate the Entry knob
until USB is displayed in the Trigger softkey, then press the Settings softkey to display
USB Trigger Menu.
Trigger on: Signal
condition speed
5 Press the Speed softkey to select the speed of the transaction being probed.
You may select Low Speed (1.5 Mb/s) or Full Speed (12 Mb/s).
6 Press the D+ and D– softkeys to select the channel connected to the USB signal D+
and D– lines. The D+ and D– labels for the source channels are automatically set.
Currently selected
data source

USB trigger

D+ source D– source
channel channel
InfiniiVision Oscilloscopes User's Guide
End of packet trigger
SE0 portion of EOP
Trigger level
or threshold
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