RIGOL Chapter 5 Trigger
5-54 MSO4000/DS4000 User’s Guide
source is CH1 to CH4) or threshold level (when the trigger source is D0 to
D15) (please refer to “Trigger Level/Threshold Level”). The current
trigger level/threshold level is displayed at the upper-right side of the
screen.
2. Specify the D- signal source and adjust the trigger level/threshold
level
Press D- and select the D- signal source and adjust the trigger level/threshold
level according to step 1.
3. Specify the signal rate
Press Speed to select “Low Speed” or “Full Speed”.
4. Specify the trigger condition
Press When and turn the multi-function knob to select the desired trigger
condition. You can also press When continuously to switch the current trigger
condition.
SOP: trigger at the sync bit at the start of the data packet.
EOP: trigger at the end of the SEO portion of the EOP.
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.
5. 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.
6. 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”).
Note: When the D+ or/and D- signal sources are set to D0 to D15, the noise
rejection is invalid.
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