利用学生示波器和学生信号源等器件就可以演示有关电磁波的发射和接收的全部实验,即电磁波的发射条件和调幅,电谐振、检波和滤波等实验。今介绍如下: 一、电磁波的发射条件的演示 1.演示发射条件之一:发射电磁波的振荡电路必须开放。实验装置如图1所示,左边部分为发射装置,右边 The use of student oscilloscope and student signal source and other devices can demonstrate all the experiments on the launch and reception of electromagnetic waves, that is, the emission conditions of electromagnetic waves and amplitude modulation, electrical resonance, detection and filtering experiments. This is introduced as follows: First, the demonstration of the launch conditions of electromagnetic wave 1. Demonstrate one of launch conditions: the oscillation circuit that launches the electromagnetic wave must be open. The experimental setup is shown in Figure 1, the left part is the launcher and the right one