Data Sheet

RIGOL 5 To Trigger the Oscilloscope
MSO4000/DS4000 User’s Guide
5-36
USB Trigger
Trigger on the SOP, EOP, RC, Suspend and Exit Suspend of the data packet on the
differential USB data cable (D+ and D-). This trigger supports USB Low Speed and
Full Speed. The figure below shows the USB data transmission protocol.
Trigger Type:
Press Type to select “USB”. At this point, the trigger setting information as shown in
the figure below is displayed at the upper right corner of the screen.
Source Selection:
Press D+ and D- to specify data sources for D+ and D- data cables respectively. CH1
to CH4 or D0-D15 can be selected as the
Trigger Source. The current trigger
source is displayed at the upper right corner of the screen.
Signal Speed:
Press Speed to select “Low Speed” (1.5 Mb/s) or “Full Speed” (12 Mb/s).
Trigger Condition:
Press When to select the desired trigger condition.
 SOP: trigger at the sync bit at the start of the data packet (SOP).
 EOP: trigger at the end of the SEO portion of the EOP of the data packet.
 RC: trigger when SEO is greater than 10 ms.
 Suspend: trigger when the idle time of the bus is greater than 3 ms.
 ExitSuspend: trigger when the bus exits from idle state for more than 10 ms.
Trigger Mode:
Press Sweep to select the Trigger Mode (page 5-3) under this trigger type as auto,