Reflections at a short-circuit

davenn

WOW, what a classic video ... pun intended. Produced in the year I was born haha

Tho I have learn and know those principles, for my work in RF transmission lines, I have never seen them demonstrated in such a clear way

thanks nsaspook :)

Dave

sophiecentaur

Should be required viewing for everyone, before they think of asking questions about waves 'n' things on PF.
So much for Computer Graphics.
Brilliant.

Windadct

Actually - I never totally got my brain around this until I used a Time Domain Reflectometer (TDR) - the wiki is http://en.wikipedia.org/wiki/Time-domain_reflectometer

Basically is it a RADAR for a transmission line - when set to the right line type, it will tell you distance to AND type of fault ( Short, Open, impedance mis-match - etc).

I started using a thumper ( http://www.hvinc.com/downloads/cds_brochure.pdf ) which evolved into a TDR-Thumper ( http://green.rapidsw.com/images/pdfs...andThumper.pdf ) The thumper name comes from the sound, used on Medium V ( 1000-69KV) buried cable, when you shoot a 1000J down the cable - and it hits the fault - it makes a thump - of course when you dig up the cable and still can not find the fault you do it again - then it is a BANGer!