Method and apparatus for testing systems that communicate over digital buses by transmitting and receiving signals in the form of standardized multi-bit binary encoded words
US4393498A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jan 22, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus is disclosed for testing line replaceable units (LRUs) of an avionics system in which the various units of the system exchange information by means of transmitting and/or receiving digital communication words, each word having a predetermined, standardized format. In a transmit test mode of the apparatus, the information content of a test word is formulated in either engineering or binary form by using a keyboard to create the word manually, or by retrieving a preprogrammed word or sequence of dynamically changing words from a plug-in programmable read only memory (PROM). Once formulated and stored, the communication word is repetitively transmitted, at selected word and bit transfer rates, from one or more output ports provided on the test set and applied, by a jumper connection, to a data communication bus that, in turn, is connected to one or more avionic LRUs. A CRT on the control panel of the test set simultaneously displays the information content of the transmit word, both in engineering and binary form. In a receive mode, a signal receiving port is coupled to a communication bus associated with one or more avionics LRUs for monitoring preselected communication …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.