Built-in self test for a satellite demodulator
US6259314A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Feb 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention is a demodulator (50, 100) and a method of data reception and testing of a demodulator. A demodulator in accordance with the invention includes an input signal source (52, 102) having an output which during data reception is a data signal and which during testing of the demodulator is a reference signal; a tuner (54, 101) having a tuner input coupled to the output of the input signal source and a tuner output, the tuner including a frequency converter (20, 36) which frequency shifts the data signal to a lower carrier frequency during data reception to cause the tuner to output at the tuner output the lower carrier frequency modulated with the data signal and which upwardly frequency shifts the reference signal to a test carrier frequency during the testing; and a test data source (56, 105) which applies a test data signal to the tuner during the testing to cause the tuner to output at the tuner output the test carrier frequency modulated with the test data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.