Why is there terminating resistor at One end of CAN cable ?

Three Controller Area Network(CAN) wires CAN HIGH, CAN LOW, and GROUND are connected from Vector VN1630 CANOe Box to my target embedded board.  Exactly where to connect the terminating resistor and what is the need for it ?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Dave BaldwinFixer of ProblemsCommented:
This article http://en.wikipedia.org/wiki/CAN_bus has some good diagrams.  Terminating resistors are normally across the HIGH and LOW leads on all kinds of balanced transmission lines.  The second diagram shows a 'star configuration' which can be a little more complicated to terminate.

Terminating resistors are used to 'terminate' the line in it's 'characteristic' impedance to preserve the quality of the signal.  This minimizes unwanted reflections and signal distortions that you get with open or shorted lines.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.