Method and detection of phase and frequency modulation
US4085367A · kind A · utility
6Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1976 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Dec 10, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B14/002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is disclosed a measurement and recording system having means for simultaneously displaying and recording the spectrum of a signal and the instantaneous phase of selected spectral components of the signal with respect to a local reference signal. Means are disclosed for displaying and recording the signal element lengths as a function of time. The system and method enables an analysis of digitally modulated signals of unknown modulation. The system also provides a means to detect faults in the system equipment that may be generating signals having undesirable variations in phase, frequency, or amplitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.