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我台用1kW电视发射机转播中央电视台第一套节目,过去经常出现这样的现象:从地面站送到发射机的图像信号有上下移动的黑道干扰、伴音信号有交流声,我们经反复试验,查明了原因。由于地面站与转播台之间距离较远(80m),两地的地电位不等,如图1。
I Taiwan 1kW TV transmitter broadcast the first set of programs CCTV, in the past often such a phenomenon: sent from the ground station to the transmitter image signal up and down the movement of the underworld interference, audio signals have humming, we have repeatedly tested, Identified the reason. Due to the distance between the ground station and the relay station (80m), the ground potentials of the two places are different, as shown in Figure 1.