Test apparatus for monitoring digital transmissions
US4408226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1981 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | Jan 9, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Test apparatus for monitoring transmissions contained in a broad band television video signal is disclosed including a sampling device operating at an integer multiple of the digital bit rate which is above the Nyguist level and a temporary storage device for storing the sample produced by the sampling device. A microprocessor is used to compute from the stored samples a value of a parameter of the digital transmission and to control the sampling device whereby the sample can be taken at appropriate points for the parameter to be tested. To that end, conversion means are provided for converting the stored samples so as to recreate the input digital transmission for resampling at the points determined by the microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.