Method and apparatus for eliminating harmonic skip
US4647847A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Jan 9, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided to eliminate harmonic skip problems in a down-conversion system. The method makes use of the relationship between the frequency of the intermediate frequency signal and the harmonic number of the local oscillator signal with respect to the frequency of the frequency of the source signal. By monitoring and measuring corresponding changes in the intermediate frequency signal caused by predetermined changes in the frequency of the local oscillator signal, a determination of the proper local oscillator signal and the proper harmonic can be made using a processor. The proper frequency and harmonic can then be maintained by periodically checking the relationship between variables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.