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Data Mask: it is hexadecimal, 0-Mask, f-No Mask, 1~e mask some data.
5. Trigger Condition: Press Overtime softkey to set the timeout, the range is from 8 ns to 10 s.
Timeout: the clock (SCL) signal need to maintain a certain idle time before the oscilloscope searches for
a trigger. The oscilloscope will trigger on when the data (SDA) satisfying the trigger conditions is found.
6. Slope: Press Slope softkey to select the desired clock edge.
Rising: sample the SDA data on the rising edge of the clock.
Falling: sample the SDA data on the falling edge of the clock.
7. When select SCL channel, press SCL and use Trigger Level knob to modify the trigger level of the SCL
channel. When select SDA channel, use Trigger Level knob to modify the trigger level of the SDA
channel.
8. Press the Mode softkey, turn V0 to select the trigger mode (auto, normal), and press V0 to confirm.
Auto: When the oscilloscope meets the trigger condition, it completes a trigger acquisition once; when
the trigger condition is not met, it can run the acquisition waveform freely.
Normal: When the oscilloscope meets the trigger condition, the input waveform is displayed; when the
trigger condition is not met, the original waveform is displayed.
9. Press the Holdoff softkey and turn V0 to set the time that the oscilloscope waits before a trigger to
the next trigger, so that complex waveforms are displayed stably.
2.7.14. IIC Trigger
IIC (Inter-IC bus) signals setup consists of connecting the oscilloscope to the serial data (SDA) line and
the serial clock (SCL) line and then specifying the input signal threshold voltage levels.
To set up the oscilloscope to capture IIC signals, please refer to the following:
1. Press the [Trig Menu] button on the front panel to enter the Trigger system function menu.
2. Press the Type softkey, then turn the Multifunctional Knob to select IIC and push down the knob to
confirm.
3. Source Selection: Press SCL and SDA softkey, turn the Multifunctional Knob to to specify the data
sources of SCL and SDA respectively. They can be set to CH1-CH2.
4. Press When softkey to set trigger condition. Select trigger condition “Start Bit”, connect the SCL
signal to CH1 and connect the SDA signal to CH2.
Press the corresponding Level softkey; then, turn the Trigger Level knob to set the signal threshold
voltage level.
Data must be stable during the entire high clock cycle or it will be interpreted as a start or stop
condition (data transitioning while the clock is high).
Trigger Condition: Press When softkey to select the desired trigger condition.
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