DPO6000, MPO6000 Series Digital Fluorescent Oscilloscope Product Manual V1.3 If the icon is lit, the Gen1 channel is turned on. 18. CH4 status display [4-channel series] If the icon is lit, the CH4 channel is turned on. 19. CH3 status display [4-channel series] If the icon is lit, the CH3 channel is turned on. 20. CH2 status display If the icon is lit, the CH2 channel is turned on. 21. CH1 status display If the icon is lit, the CH1 channel is turned on. 22. Channel zero-scale position display 23.
Channel trigger level position display Sampling system To understand the oscilloscope's waveform acquisition system, you need to understand the sampling principle and understand the relationship between sampling rate and memory depth. Sampling principle According to the Nyquist sampling principle, in order to restore the analog signal with- out distortion, the sampling frequency should be greater than twice the highest fre- quency in the analog signal spectrum (Fs> 2Fmax). The higher the sampling rate, the later the recovered waveform will be closer to the original signal, but the system re- quirements will be higher, and the conversion circuit must have a faster conversion speed.
Waveform aliasing If the sampling cannot be satisfied (Fs> 2Fmax), the waveform frequency when recon- structing the sampled data is smaller than the frequency of the actual signal. The most common aliasing is dithering on the fast edge. 20