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本文用频谱分析方法及卡逊定律,得到在调频电视传输中最大可传输视频峰峰频偏新的计算方法。用此方法计算出过频偏的容限值比一般方法宽。文中给出计算及实验结果,表明带宽20MHz时,Δf_(ppv)为15MHz;带宽27MHz时,Δf_(ppv)为18MHz。
In this paper, spectrum analysis and Carson’s law are used to get the new calculation method of the maximum transmittable peak-to-peak frequency deviation in FMTV transmission. Use this method to calculate the tolerance of over-frequency deviation than the general method. The calculation and experimental results show that Δf_ (ppv) is 15MHz when bandwidth is 20MHz, and Δf_ (ppv) is 18MHz when bandwidth is 27MHz.