Agilent Technologies 6000 Series User Manual page 150

4 Triggering the Oscilloscope
150
As you press the D+
on mixed-signal oscilloscopes), the D+
source channel is automatically set and the channel you
select is shown in the upper-right corner of the display next
to "USB".
Adjust the trigger level for the selected analog channel by
turning the Trigger Level knob. Press the D15 Thru D0 key and
select Thresholds to set the threshold level for digital
channels. The value of the trigger level or digital threshold is
displayed in the upper-right corner of the display.
4 Press the Trigger: softkey to select where the USB trigger will
occur:
SOP (Start of Packet) — triggers at the Sync bit at the
•
beginning of the packet.
EOP (End of Packet) — triggers at the end of the SE0
•
portion of the EOP.
RC (Reset Complete) — triggers when SE0 is > 10 ms.
•
Suspend (Enter Suspend) — triggers when the bus is idle
•
> 3 ms.
Exit Sus (Exit Suspend) — triggers when exiting an idle
•
state > 10 ms. This is used to see the suspend/resume
transition.
D+,–
Bus Idle
D–,+
SOP
or
D– softkey (or rotate the Entry knob
and
SE0 portion of EOP
6000 Series Oscilloscope User's Guide
D– label for the
End of packet trigger