从工程应用的角度出发，在理论上分析了影响两种基本类型微波天线差波束的零值深度、零点位置等指标的因素。

The factors which have influence over the null depth and zero point position of two basic microwave antenna difference beams are analyzed theoretically from the point of engineering application.

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无碰撞区跳频通信系统的跳频器所使用的跳频码是无碰撞区跳频码，该码在零位移附近一段区域内汉明相关值为零。

The No-Hit-Zone (NHZ) hopping code is employed by the frequency hopper of NHZ FH communication systems, which have no hits at all within a predefined correlation zone in the vicinity of zero shift.

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重力值是通过使横臂恢复零位而测定的。

The gravity is measured by nulling the beam.

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