Method and apparatus for in-line detection of satellite signal lock
US7773937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2005 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Jun 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H40/90
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for detecting satellite signal lock in a satellite receiver system is disclosed. The system may include a first filter that isolates a noise frequency from the satellite signal, and/or a second filter that isolates a service frequency from the satellite signal. A comparator may then determine whether the output of the first and/or second filters is greater than a threshold level associated with an incipient loss of lock on the broadcast signal. The method includes the steps of filtering a received broadcast satellite signal to generate a service signal having a center frequency between a first transponder center frequency of a first transponder band and a second transponder center frequency of a second transponder band that overlaps the first transponder band, and comparing the output of the filter to a threshold value. In either the method or the apparatus, a command may be issued if the signal value is below the threshold value, thereby informing the user of the loss of signal lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.