“heterodyne frequency meter”的概念、定义、翻译、参考文献-科学参考

单词	heterodyne frequency meter
释义	heterodyne frequency meter [`hed·ǝ·rǝ´dīn `frē·kwǝn·sē ´mēd·ǝr] ^ELECTRONICS A frequency meter in which a known frequency, which may be adjustable or fixed, is heterodyned with an unknown frequency to produce a zero beat or an audio-frequency signal whose value is measured by other means. Also known as heterodyne wavemeter.
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