Apparatus for measurement by digital spectrum analyzer
US4607216A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1984 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Sep 25, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency range of measurement is divided into a plurality of regions. For each region a test signal suitable for measurement of the region is generated independently, and the test signal is supplied to a device under test. The output of the device under test is converted by an AD converter into a digital signal, which is then subjected to fast Fourier transform. For each region the sensitivity of the AD converter is set for optimal conversion of the signal level at its input side by the converter, and then the fast Fourier transform is carried out. On the basis of the sensitivity set for one of the regions, the magnitude of the fast Fourier transform output in each of the other regions is corrected according to the sensitivities set for the other regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.