Providing precise timing control between multiple standardized test instrumentation chassis
US7366939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2005 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Nov 25, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Precise timing control across multiple standardized chassis such as PXI is obtained by providing several control signals over PXI_LOCAL within each chassis, and by providing these control signals to other chassis. A Least Common Multiple (LCM) signal enables all clocks to have coincident clock edges occurring at every LCM edge. A start sequence allows all PXI expansion cards in the test system to start at the same time. A MATCH line enables pincard modules to check for expected DUT outputs and either continue execution of their local test programs or loop back and repeat a section of the local test program in accordance with the result of the DUT output check. An End Of Test (EOT) line enables any one pincard module to abruptly end the local test programs running in all other pincard modules if an error is detected by the local test program in the pincard module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.