将示波器读数频率值、回测信号频率值、理论输出频率值三者对比验证。回测信

Compare and verify the oscilloscope reading frequency value, back-test signal frequency value, and theoretical output frequency value. The frequency value of the back-test signal is shown in the lower right corner of the LCD screen, as shown in Figure 7(a), the LCD shows 1KHz, and the preset value is 1KHz at this time. It can be seen from the Scale time that the reading is 0.1ms per division, and one cycle occupies 10 divisions, so the frequency is 1KHz. It can be obtained that the three values ​​are consistent. The principle is the same when the frequency is 10KHz.

The oscillostor reading frequency value, the return signal frequency value and the theoretical output frequency value are compared and verified. The return signal frequency value is shown in the lower right corner of the LCD screen, and the Figure 7 (a) LCD shows 1KHz, at which point the preset value is 1KHz. From the Scale time you can see that the reading is 0.1ms and the period is 10 squares, so the frequency is 1KHz. Thus, the values of the three can be consistent. The principle is the same at 10KHz frequencies.

The oscilloscope reading frequency value, the measured signal frequency value and the theoretical output frequency value are compared and verified. The frequency value of the return test signal is shown in the upper and lower right corner of the LCD screen, as shown in Figure 7 (a), the LCD displays 1kHz, and the preset value is 1kHz. From the scale time, we can see that the reading is 0.1ms per grid, and one cycle takes up 10 grids, so the frequency is 1kHz. The results show that the three values are consistent. The principle is the same at 10kHz.<br>