User manual

Chapter 2 Calibration Procedures RIGOL
DS4000 Calibration Guide
2-3
Delay Calibration
Make sure the oscilloscope has been warmed up for 30 minutes before performing delay calibration.
Then, follow the steps below to calibrate the instrument.
1. Output a square waveform with 100 kHz frequency, 4 Vpp amplitude and 50 Ω impedance from the
signal generator.
2. Connect the above-mentioned signal to all the input channels (except the external trigger channel)
of the oscilloscope using the BNC One-to-Five Cable.
3. Enter the second-page menu (Figure 4) of the project mode and select DelayCal to start the
calibration.
4. The delay calibration would last for about 2 minutes. Restart the oscilloscope when the
“Calibration finished, please restart the oscilloscope!” message is displayed.
5. Set the time base to the minimum scale (500MHz oscilloscope: 1ns scale; 350 MHz and 200 MHz
oscilloscopes: 2 ns scale; 100MHz oscilloscope: 5 ns scale) and set the vertical scale and input
impedance of each channel to 500 mV/div and 50Ω respectively to view whether offset to the zero
point of the waveform of each channel occurs. If yes, calibrate again. The failed waveform is as
shown in Figure 8.
6. Keep the time base setting unchanged. Turn all the channels on, then turn any of the channels off
and view whether other channels are affected and whether the waveforms jump. If yes, perform
delay calibration again. The normal waveform should be as shown in Figure 9.
Figure 8