Adjacent channel selectivity signal generator system
US5133083A · kind A · utility
8Cited by
6References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1990 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Jan 12, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an adjacent channel measurement system, a desired channel signal and an adjacent channel signal are generated using a single signal generator. The output from this generator is modulated with a signal from an offset oscillator to produce a carrier and a sideband signal, one in each channel. The ratio of the carrier amplitude to the sideband amplitude is set by the system's modulation index, which is controlled by an audio attenuator on the output of the offset oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.