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Frequency measurement technique based on frequency conversion


NING Ze-hong(宁泽洪)1,2, XU Da-wang(徐达旺)1,2, DONG Zhan-yong(董占勇)1,2

 


(1. Science and Technology on Electronic Test & Measurement Laboratory, Qingdao 266555, China;  2. The 41st Institute of China Electronics Technology Group Corporation, Qingdao 266555, China)

 

Abstract: To measure the signals with high frequency(>500 MHz), a sampling frequency down conversion method is introduced. This paper analyzes the intermodulation signals and figures out the relationship between the intermodulation signal and intermediate frequency signal. Based on the frequency conversion technology, an exclusion algorithm is proposed and the actual implementation of the algorithm is given. The application results show that the exclusion algorithm can identify the intermodulation signal exactly and eliminate the bad influence on the frequency measurement.

 

Key words:frequency mixing; intermodulation signal; intermediate frequency; local oscillator; harmonic order

 

CLD number: TN911.7 Document code: A

 

Article ID: 1674-8042(2013)02-0146-04 doi: 10.3969/j.issn.1674-8042.2013.02.011

 


References

 

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