Typical smart meter designs include periodic transmission of current, phase, and frequency data from the user to the electricity distribution company.

典型的智能度量设计包括来用户端的电流、相位和频率数据向电力调配公司的周期传送。

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When using frequency sweep meter to measure the input impedance of antenna, the balanced - unbalanced transformer must be connected between coaxial transmission line and antenna.

用扫频仪测量天线的输入阻抗时，在同轴传输线与天线间应按平衡—不平衡变换器。

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