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Triggering the Oscilloscope
To use USB triggering
To use USB triggering
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.
1Press 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.
2Press 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).
D
+,–
D–,+
Bus Idle
SOP
SE0 portion of EOP
End of packet trigger
Signal
speed
D+ source
channel
D– source
channel
Trigger on:
condition
Trigger level
or threshold
Currently selected
data source
USB trigger
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