Lee Jones wrote:

>>I  need to test a series of CAN transceivers on maximum cables lengths=20
>>for agiven bitrate (250kbs, 500 meters CAT5) to determine the optimum=20
>>sample point and wonder how I best do this.  My first though  is to use=
=20
>>just a RC low pass filter with R equal to the the cable resistans and C=
=20
>>equal to the capacitance. This will not take the propagation delay into=
=20
>>account and I have no idea on how to simulate that. Will this be to any=
=20
>>use at all for me or do I have to think in a completely different way?
>>   =20
>>
>
>Why simulate it?  Here in the US, a 1000' (304 meters) of cat 5e
>cable is only about $55.  Buy a couple boxes, test with real 500M
>length of cable, then use it to wire a few new network locations.
>
>						Lee Jones
>
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> =20
>
Yes, this  is how I do this today. It is perfectly fine but a bit bulky=20
and it would have been nice to have a test setup on a board for this as=20
it is something that comes up ever so often. But sure nothing beats the=20
real thing. ;-)

/Ake



--=20
 ---
Ake Hedman (YAP - Yet Another Programmer)
eurosource, Brattbergav=E4gen 17, 820 50 LOS, Sweden
Phone: (46) 657 413430 Cellular: (46) 73 84 84 102
Company home: http://www.eurosource.se     =20
Kryddor/Te/Kaffe: http://www.brattberg.com
Personal homepage: http://www.eurosource.se/akhe
Automated home: http://www.vscp.org


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