RIGOL Chapter 5 Trigger
5-48 DS4000E User’s Guide
adjust the signal rate within a relatively larger range, this function can help
you quickly finish the setting.
7. Specify the trigger mode
Press Sweep to select “Auto”, “Normal” or “Single” (please refer to “Trigger
Mode”). The corresponding status light of the trigger mode currently selected in
the trigger control area (TRIGGER) at the front panel turns on.
8. Turn the noise rejection on or off
Press Setting to enter the trigger setting submenu. In this submenu, press
Noise Reject to turn the noise rejection on or off (please refer to “Noise
Rejection”).
USB Trigger
DS4000E 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.
Figure 5-9 USB Data Transmission Protocol
Press MENU (in the trigger control area (TRIGGER) at the front panel) Type, turn
the multi-function knob to select “USB” and press the knob. You can also press
Type continuously to switch to “USB” trigger.
At this point, the trigger setting information (include the trigger type, trigger source
and trigger level, as shown in the figure below) is displayed at the upper-right side of
the screen and changes with the trigger setting.
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