Usb Trigger - Rigol MSO4000 Series User Manual

Chapter 5 Trigger

USB Trigger

MSO4000/DS4000 can trigger on a Start of Packet (SOP), End of Packet (EOP), Reset
Complete (RC), Enter Suspend (Suspend) or Exit Suspend (ExitSuspend) of the
differential USB data lines (D+ and D-).
This trigger supports USB low speed and full speed. The figure below shows the USB
data transmission protocol.
Press MENU (in the trigger control area (TRIGGER) at the front panel)  Type, turn
the multi-function knob
Type continuously to switch to "USB" trigger.
At this point, the trigger setting information (include the trigger type, trigger source
and trigger level/threshold level, as shown in the figure below) is displayed at the
upper-right side of the screen and changes with the trigger setting.
Set the USB trigger:
1. Specify the D+ signal source and adjust the trigger level/threshold
MSO4000/DS4000 User's Guide
800.544.2843
Figure 5-8 USB Data Transmission Protocol
level
Press D+ to select CH1 to CH4 or D0 to D15 (please refer to "Trigger
1)
Source"). The signal source currently selected is displayed at the
upper-right side of the screen.
Note: Channels that are turned off can also be selected as the D+ and D-
signal source.
Turn TRIGGER
2)
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15
10 20
5 25
0 30
to select "USB" and press the knob. You can also press
LEVEL to adjust the trigger level (when the trigger
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