rpm signal simulator

I am trying to find a way to be able to simulate an rpm signal to activate switches and computer.I thing it is an rf signal.{white wire out of mag signal converter box}Thanks for any help.

 

I found what I was after.MSD 8998.This deal is pretty neat.Check it out.

 

this may work also,0-5 volt outputs also:
http://www.diyautotune.com/catalog/...imulator-wheel-simulator-unassembl-p-174.html

 

Does that thing come with directions?Or can you draw me some up?

 

http://jbperf.com/JimStim/index.html or buy it assembled:http://www.diyautotune.com/catalog/...tor-with-wheel-simulator-assembled-p-178.html