Connecting lap top to CAI 302

Two comments;

1) The serial/usb switch position is only applicable to later model
302's (after Dec 2008). My older model doesn't have this feature. I
am mentioning this so that when troubleshooting you ask which vintage
of 302 they have (can't tell from the front?). Do the new models all
have black cases while the old models have silver? Does an older 302
converted to USB ($175 with calibration) get a new black case?

http://www.cumulus-soaring.com/cai/302-back.jpg rear
view of old model
http://www.cumulus-soaring.com/cai/302-USB-labels.jpg rear
view of new model

2) The 302 memory issue - It seems to have several flavors. In my
case I got a "could not get fat" error. In other cases there are
security errors. My fix, and others, was to wipe the memory. I
brought together all of the information I could find (from RAS, etc)
into a single document available at; http://aviation.derosaweb.net/#cambridge302.

Good Luck, John DeRosa