Chapter 5 Trigger RIGOL
DS4000E User’s Guide 5-31
I2C Trigger
DS4000E 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, as shown in the figure below) is displayed at the upper-right side of
the screen and changes with the trigger setting.
1. Specify the clock line signal source and adjust the trigger level
1) Press SCL to select CH1 to CH4 (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.
Note: Channels that are turned off can also be selected as the signal
source of the SCL and SDA.
2) Turn TRIGGER
LEVEL to adjust the trigger level (please refer to
“
Trigger Level”). The current trigger level is displayed at the upper-right
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