NDLI: SPACEWIRE CABLE CHARACTERISATION Session: 7. SpaceWire Test and Verification Long Paper

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SPACEWIRE CABLE CHARACTERISATION Session: 7. SpaceWire Test and Verification Long Paper

Content Provider	Semantic Scholar
Author	Suess, Martin
Copyright Year	2007
Abstract	The SpaceWire physical layer comprising twisted pair cables and micro-miniature Dtype connectors is specified in detail in the SpaceWire standard ECSS-E-50-12A. In some cases the physical layer defined in the standard is not fulfilling all requirements of a specific application. The cables as defied in the standard are quite rigid and not handy for use in the laboratory and for SpaceWire connections over very long distances (>10 m) cables with lower loss are required. For this purpose cables with stronger gauge as well as different types of connectors have been proposed. In order to be able to assess the consequences of these modifications a test setup for SpaceWire cable and connector characterisation has been developed and a set of performance parameters to be measured have been defined. The testing uses a Vector Network Analyser (VNA) and a set of specially developed interface boards to measure S-parameters. From these S-parameters the performance figures for return loss, insertion loss, nearand far-end crosstalk can be derived. The paper describes the different test setups and how the performance figures are obtained from the measurements. 1 SPACEWIRE CABLE SPECIFICATION The SpaceWire cable and connector is specified in the SpaceWire standard [1] in the chapters 5.2 and 5.3. For the cable a detailed specification of the construction is provided in the standard (Figure 1). It specifies the diameter of the twisted pair conductors and of the wires in the braided shields, the materials used for the filler and the protective sheath etc. as well as the physical properties of the resulting cable like diameter, bent radius, mass and colour. Conductor 28 AWG (7 x 36 AWG)
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://2007.spacewire-conference.org/proceedings/Papers/Test%20and%20Verification%201/suess.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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