发明名称 |
Method for harmonic number determination in a microwave frequency counter |
摘要 |
Method and apparatus for determining a generalized harmonic number in a harominic heterodyne converter wherein the frequency of an input signal is determined from a local oscillator frequency, an intermediate frequency obtained by mixing the local oscillator frequency with the input signal, and a harmonic number. The likelihood of error in determining harmonic number is reduced by providing a large separation between local oscillator frequencies that are used in determining harmonic number. The method involves the steps of determining an estimated harmonic number utilizing closely-spaced local oscillator frequencies and then utilizing the estimated harmonic number to compute widely-spaced local oscillator frequencies which are utilized for determining a corrected generalized harmonic number. One variation of the technique is utilized for high harmonic numbers, and another variation of the technique is utilized for low harmonic numbers.
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申请公布号 |
US5008610(A) |
申请公布日期 |
1991.04.16 |
申请号 |
US19890388208 |
申请日期 |
1989.07.31 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
NELSON, NANCY W.;COSART, III, LEE D.;PEREGRINO, LUIZ;INGMAN, ERIC M. |
分类号 |
G01R23/14 |
主分类号 |
G01R23/14 |
代理机构 |
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代理人 |
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地址 |
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