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超高频(UHF)频段的电视广播是在甚高频(VHF)频段已不敷应用的情况下发展起来的。它的特点是:(1)频道数量多;(2)受工业干扰少,图象稳定;(3)接收天线振子的尺寸小,一般由于天线设置不当所造成的图象质量下降现象可得到改善。所以,从普及电视特别是彩色电视和建立完整的广播体制来看,超高频电视广播是很理想的。为了适应超高频电视广播的需要,上海人民无线电厂制成了星火JD88型12英寸全频道晶体管黑白电视机,现已投入市场。这种电视机的外型美观大方,内部结构简单合理,性能稳定可靠。主要技术性能接收频道:甚高频(V)频段1～12;超高频(U)频段13～48(频率范围见表1)
Television broadcasting in the ultra-high frequency (UHF) band was developed when the VHF band was inadequate. Its characteristics are: (1) the number of channels is large; (2) it is less affected by industrial interference and the image is stable; (3) the size of the receiving antenna vibrator is small and the image quality degradation generally caused by improper antenna setting can be improved . Therefore, in terms of popularizing television, especially color television, and establishing a complete broadcasting system, UHF television broadcasting is ideal. In order to meet the needs of ultra-high frequency television broadcasting, Shanghai People’s Radio Factory made sparks JD88 12-inch full-channel transistor black and white TV, is now on the market. This TV looks nice, the internal structure is simple and reasonable, stable and reliable performance. Main technical performance receiving channel: VHF (V) band 1 ~ 12; UHF (U) band 13 ~ 48 (frequency range shown in Table 1)