Transmitter output monitor
US3958244A · kind A · utility
15Cited by
2References
2Claims
0Family size
Inventors
Key dates
| Filing date | Sep 25, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Sep 25, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S1/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitor for detecting faults in the output signals of a transmitter in which a selected modulation component of the signal is used to activate fault-detecting means. In the case of a DVOR beacon system, the sub-carrier frequency is filtered from the detected and amplified signal obtained by a monitor antenna and applied to a full-wave rectifier, and the fault detecting means responds to the absence of one or more of the unidirectional pulses thus produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.