Acquisition EN When the average acquisition mode is selected, the average number can be set. The higher the average number is, the lower the noise is. The range is 2-256. 11.3 Display mode The display mode can be YT, XY, and scroll. YT mode: The most commonly used display mode, Y-axis represents the voltage, X-axis represents the time. When the horizontal time base is greater than 100ms, the oscilloscope automatically enters the scanning mode. When the large time base is large (such as 200ms and above), sometimes the waveform will not be displayed for a long time. This is because under YT mode, waveform must be triggered before display.
This time has a great relationship with the time base, which can be roughly calculated as: the number of grids on the left of the trigger position * the time base gear. If you want to reduce the wait time, you can move the trigger position to the left. We do not consider moving the trigger position off the waveform screen. XY mode: The oscilloscope converts two data channels from a voltage-time display to a voltage-voltage display. XY mode is used to analyze the phase difference, such as those described by lissajous figures.
Figure 11.1 Phase difference schematic diagram According to sin θ =A/B or C/D, where θ is the angle difference between channels, A, B, C and D are defined in the figure above. Thus the angle difference can be obtained, namely: θ = ± arcsin(A/B) or ± arcsin(C/D). If the principal axis of the ellipse is in quadrants I and III, the obtained phase difference angle should be in quadrants I and IV, that is, in (0 to π /2) or (3 π /2 to 2 π ). If the Tablet1000 User manua l Copyright © Qingdao Hantek Electronics Co., LTD 54