Apparatus and method for measuring the transmission characteristics of a network
US3978282A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1971 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Feb 4, 1991 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A substantially non-interfering, low-intensity sweeping test signal is transmitted along a network to be tested. Means are provided for receiving and tracking the test signal at the opposite end of the network. A reference signal is transmitted along with said test signal for alerting and synchronizing the operation of the tracking means. The reference signal is at a frequency outside of the range of operating or normal signals transmitted over the network. Desirably the reference signal comprises a sweeping and a fixed frequency signal. These are then used to generate the sweeping test signal. Also, the reference signal is used by the tracking means for processing the received test signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.