Method and apparatus for measuring timing characteristics of message-oriented transports
US6546516B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1999 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Nov 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/0066
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Timing characteristics of message-oriented transports are measured using common personal computers which easily support a wide variety of analytical tools. The apparatus measures timing characteristics of bursty message traffic over relatively low-speed digital transports such as the Musical Instrument Digital Interface (MIDI). The apparatus includes means for generating a reference pulse stream, such as a sequencer. A transcoder device receives the reference pulse stream and routes the pulse stream to a device under test and, in analog form, to a first channel input of a digital recording device, such as a sound card installed in a personal computer. The transcoder also receives an output pulse stream from the device under test and routes the output pulse stream, in analog form, to a second channel input of the digital recording device. A differential technique allows timing errors in the reference pulse stream to be eliminated from measurements. The apparatus can also be used for measuring propagation characteristics of a particular transmission medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.