摘要 |
PROBLEM TO BE SOLVED: To provide an electric field measuring device that facilitates confirmation of output saturation and distortion state of a transmission apparatus due to level in an input signal from an antenna, and does not disturbs electric field measurement in facilities such as an anechoic chamber due to noise from a measuring instrument itself. SOLUTION: A head 2 arranged in an anechoic chamber is provided with: a signal intensity detector (RF detector, level detection circuit) detecting whether the intensity of an output signal of an antenna exceeds a prescribed level; a signal generator generating a detection result signal on the basis of a detection result of the signal intensity detector; and an MZ type modulator. The MZ type modulator is driven by multiplexing the detection result signal to the output signal of the antenna, the detection result signal is detected by a monitor PD and a monitor detection circuit provided at a controller part 6 outside the anechoic chamber, and the detection result is displayed on a display device. COPYRIGHT: (C)2011,JPO&INPIT
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