无线广播电台发射的功率,一般在数千瓦~数百千瓦以上,当电台的发射天线发出的电磁波进入电缆(或电话机)时,会在金属外皮和电缆芯线中感生电动势,从而在双线回路中产生电流。如果无线电信号频率与电话通路工作频带重合时,则在通路中形成干扰。广播音对电话音干扰(串音)影响,在通信线路距离电台发射塔附近1 km左右较重,特别是由于电台发 The power transmitted by a radio station is generally several kilowatts to hundreds of kilowatts. When electromagnetic waves from the transmitting antenna of the radio station enter the cable (or the telephone), the electromotive force is induced in the metal sheath and the cable core, Currents in the circuit. If the frequency of the radio signal coincides with the operating frequency band of the telephone path, interference is created in the path. Radio noise on the telephone interference (crosstalk), in the communication line from the radio towers near 1 km heavier, especially due to radio hair