I had hoped to be able to publish the results by now but I am still waiting for a number of people who have indicated that they should be able to make a useful contribution but haven't quite got round to it. Hopefully they will find the time over the Christmas break.
While we are waiting I thought you might be interested in a few manuals and circuits that have been donated. Many thanks to everyone who has helped with this.
The various models of the E7600 all work in the same way but there have been a number of circuit variants implementing the same functionality. I think the manual of the military version (CT80) has the best description of how the tester actually works.
Also, the circuit diagram has been drafted in some very different styles so I put all the circuits I have found into one document.
You can find all this on my web site at
http://home.btconnect.com/gmb
Merry Christmas!!