Measuring adjacent channel power
US4810960A · kind A · utility
20Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Jun 11, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A signal source from a transmitter is down-converted by being mixed with a locally generated signal so that a desired adjacent channel band is converted to base band and the adjacent channel power measured after filtering by a low pass filter. To eliminate the notch in the filter characteristics that occurs when the power is measured by a.c coupled means, the locally generated signal is modulated or swept around the center of the adjacent channel band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.