User Manual 5. Trigger Level: 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. 6. 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. 7.
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. 2.8. Protocol Decode For the menu settings under protocol decoding, please refer to the five protocol trigger settings in 2.7 Trigger System . Protocol decoding can be implemented under any trigger type. Examples of protocol decoding are shown below for reference. 2.8.1. UART Decode UART decode settings: Source: CH1; Baud: 19200; Idle: High; Parity: No; Data Bit: 8; When: “Start”. The trigger result is shown below: UART Decode interpretation: 1. The decode data is displayed in hexadecimal; 2.
The decoded data is at the bottom of the waveform interface by default, and displayed in purple; 3. When there are "?" or "adjust the time base", you need to adjust the time base to see the decoding results. UART text interface is shown as below: 34 / 67