Spectrum analyzers
US4568878A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Mar 19, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Spurious responses generated by operation of a spectrum analyzer are eliminated from the analyzer's display by selecting a feature of the displayed signal for testing, adjusting the analyzer controls to display the feature of interest at the center of the screen and with a predetermined span, adjusting the second L.O. frequency by a predetermined amount, and comparing the amplitude of the signal in the analyzer's storage location corresponding to a point on the screen at a predetermined position different from the center of the screen with the amplitude of the signal previously in the storage location corresponding to the center of the screen. If the comparison does not yield substantial equality, the selected feature is eliminated from the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.