Product category: Sensors and Data Acquisition
News Release from: DDC United Kingdom
Edited by the Electronicstalk Editorial Team on 8 February 2005
Research offers new
life for legacy databus
DDC has conducted research that suggests the bandwidth of the MIL-STD-1553 databus, which is widely used in military aircraft avionic systems, could be increased significantly
Data Device Corp (DDC) has conducted research which shows that, theoretically, the bandwidth of the MIL-STD-1553 databus, which is widely used in military aircraft avionic systems, could be increased significantly. Currently MIL-STD-1553 operates at 1Mbit/s but DDC's work shows that the theoretical capacity within a legacy system could be increased to 200Mbit/s.
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The conclusion is significant in so far as avionic legacy system bandwidth upgrades could be achieved very cost effectively.
DDC is a leading supplier of the MIL-STD-1553 interface circuits that are used in the networks of most of the western world's military aircraft.
Although the MIL-STD-1553 1Mbit/s datarate is adequate for current avionics use, there are many emerging applications that require a far higher bandwidth.
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The challenge facing the industry is to find methods of supplementing the current databus standard with higher bandwidth communication channels over the existing wiring.
For the research DDC constructed test networks representing real-life avionic systems ranging from a simple network with two couplers and 61m of cable to a complex network with 92m of cable and 32 stubs.
DDC believes that the characteristics of a most MIL-STD implementations lie between these two extremes.
The conclusion of the research was that the additional usable bandwidth is largely dependent on the number of couplers, the characteristics of the coupling transformers and the length of the bus and stubs.
The paper summarising the research is available from DDC on request.
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