DPO6000, MPO6000 Series Digital Fluorescent Oscilloscope Product Manual V1.3 Sampling rate and memory depth Sampling rate The highest sampling rate of DPO6000 / MPO6000 is 1GSa/s. In the actual use of the oscilloscope, the sampling rate is determined by the current horizontal time base scale and storage depth. The sampling rate can be changed by adjusting the horizontal time base through the horizontal gear knob, or by switching the memory depth, the sampling rate value changes in real time and is displayed in the status bar at the top left of the screen.
Memory depth Storage depth refers to the number of waveform points that the oscilloscope can store in one triggered acquisition, and it reflects the storage capacity of the acquisition memory. DPO6000 / MPO6000 series oscilloscopes have a maximum storage depth of 128Mpts. The relationship between the oscilloscope's storage depth, sampling rate, and sampling time is as follows: Sampling time = memory depth / (sampling rate (Sa/s)) For example: if the sampling rate is 1GSa/s and the storage depth is 32K, the actual sampling time is:
Sampling time = 3,2000 / 1,000,0000,000 s = 32 Ч 10 -6 s = 32us Waveform interpolation Under real-time sampling, the oscilloscope acquires discrete samples of the displayed waveform. In general, waveforms displayed by dots are difficult to observe. In order to increase the signal visibility, digital oscilloscopes generally use the interpolation display mode. The interpolation method is a processing method of "connecting various acquisi- tion points" and using some points to estimate the entire shape of the waveform.
For real-time sampling using interpolation, even if the oscilloscope only collects fewer sam- pling points in a single pass, interpolation can be used to fill in the gaps between points 22