| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the basic problem wherein signals measured in a cable does not conform to the original desire for measuring spatial propagation in actual use, in measurements using both a shielded box and an attenuator. <P>SOLUTION: A plurality of stages of radio-attenuation housing boxes, having different radio-attenuating performance, are prepared, and the radio-attenuation housing boxes are sequentially changed to decide communicability. Since communicable distances are specified according to radio attenuating performance, when communications become disabled, communicatable distances in the same spatial propagation as that in actual use can be measured, the need for expensive measuring apparatuses and shield boxes becomes unnecessary, and the effect of facilitating deciding in the point whether communication is enabled. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
