Spectrum analyzer
US4451782A · kind A · utility
31Cited by
2References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1981 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Oct 6, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a spectrum analyzer, an intermediate-frequency oscillator and the outputs from a sweep oscillator are frequency mixed to obtain a measuring signal, which is provided to a device under test. The intermediate-frequency signal and the output from the intermediate-frequency oscillator are supplied to a phase detector to detect a phase difference between them. A signal representing the detected phase difference and the output from a detector are selectively applied by a switch to a display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.