Self-testing and evaluation system
US5764694A · kind A · utility
27Cited by
7References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jan 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/50
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A testing and evaluation system for efficiently qualifying individual components of a modem. A modem data pump acts as a dBm meter by measuring distortion, noise floor, and echo. The modem is coupled to a computer and a remote modem. After calibration, the remote modem may be disconnected. A resistor having a preselected resistance is coupled to the modem to allow the computer to measure the modem noise floor and distortion independent of particular telephone connections. An echo canceler coupled to the receive line allows the sum distortion and noise to be measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.