RIGOL Chapter 5 Trigger
5-38 MSO4000/DS4000 User’s Guide
I2C Trigger
MSO4000/DS4000 can trigger on the start condition, restart, stop, missing
acknowledgement or on the read/write frame with specific device address and data
value.
The I2C bus is a two-wire serial bus consisting of the SCL and SDA. The SCL
determines the transimission rate and the SDA determines the transmission data, as
shown in the figure below.
Figure 5-3 I2C Bus
Press MENU (in the trigger control area (TRIGGER) at the front panel) Type, turn
the multi-function knob to select “I2C” and press the knob. You can also press
Type continuously to switch to “I2C” 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 I2C trigger:
1. Specify the clock line signal source and adjust the trigger
level/threshold level
1) Press SCL to select CH1 to CH4 or D0 to D15 (please refer to “Trigger
Source”) as the channel source of the clock line. The signal source
currently selected is displayed at the upper-right side of the screen.
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