| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the effect of pattern noise in a frequency measuring device of a short-gate time counting system. <P>SOLUTION: The frequency measurement device includes a plurality of frequency measurement devices (C1-Cn) of the short-gate time count system which generate outputs, corresponding to frequencies of measuring object signals and differ in a sampling frequency; a selector (50) which selects an output of some of the frequency measuring devices in a plurality and relays it to the latter stage; and a controller (100), which determines pattern noise levels in the frequency measurement devices, based on operating point parameters of the individual frequency measurement devices and makes the selector select the frequency measurement device having lower pattern noise level. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
