I recently purchased a CSI 2115 analyser. I am using a Banner Light Source for RPM/Phase sensor giving a 5 volt positive going TTL output pulse. This works well on other balancing equipment but does not appear to work with the 2115. Being an older unit it came without an instruction manual and I do not know if a 5volt TTL will work with this unit. Any help please. I would also like very much to purchase an instruction manual. Many thanks. Nicholas

I believe this is what you are looking for
http://www.compsys.com/drknow/pubtnot.nsf/9f0e142090062...04fb21a?OpenDocument

Many thanks Dave, Thats exactly what I was looking for. I would still like to get a Manual. Nicholas