Chapter 5 Trigger RIGOL
MSO4000/DS4000 User’s Guide 5-43
Note: Channels that are turned off can also be selected as the signal
source of the clock line and data line.
Turn TRIGGER
LEVEL to adjust the trigger level (when CH1 to CH4 is
selected) or threshold level (when D0 to D15 is selected) (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 data line signal source and adjust the trigger
level/threshold level
Press SDA and select the data line signal source and adjust the trigger
level/threshold level according to step 1.
3. Set the trigger condition
Press When to select “TimeOut” or “CS”.
TimeOut: the oscilloscope starts to search for the data (SDA) on which to
trigger after the clock signal (SCL) stays in the idle state for the specified
period of time.
Specify the timeout time:
Press TimeOut and turn the multi-function knob or the inner knob of
the navigation knob to adjust the minimum time of the idle state at a
relatively smaller step or turn the outer knob of the navigation knob to
adjust the minimum time of the idle state at a relatively larger step. The
range is from 100 ns to 1 s.
Note: The larger the rotation amplitude of the outer knob of the navigation
knob is, the faster the variation of the value will be. When you need to
adjust the time value within a relatively larger range, this function can help
you quickly finish the setting.
CS: the oscilloscope starts to search for the data (SDA) on which to trigger
when the CS signal is valid.
Set the CS signal:
a. Press CS to select CH1 to CH4 or D0 to D15 (please refer to “Trigger
Source”) as the channel source of the CS line. The signal source
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