Markers for readout and delta-parameter measurements on a quasi-3-dimensional display of a spectrum
US4870348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Jun 9, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method of using markers for identifying particular points on a quasi-3-dimensional display, such as a color spectrogram display or a waterfall display of multiple frequency spectra on an electronic spectrum analyzer, so that amplitude, time, and frequency values associated with a particular point can be conveniently read out, and so that differences in amplitude, time, and frequency between two points can be easily calculated and presented to the user. Two markers whose positions are ascertainable are generated on the quasi-3-dimensional display and are made subject to operator control. One of these markers is positioned by the operator on a particular point of interest and the values associated with that location are then displayed for readout with greater precision and convenience than would otherwise be possible. A second marker is placed at a second point of interest and the differences in the values of amplitude, time, and frequency between the two points are calculated and displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.