I wish all students would get the 9C since the trainer function is so "powerful". I think if you go into the trainer menu it will all become crystal clear.

For each channel you'll be able to select FUNC, INH, MIX (forgive me if I got the exact symbols wrong), meaning that particular channel is functional, inhibited, or mixed respectively on the student's box. The difference between FUNC and MIX is that in the latter all of the mixes, dual rates, expo are carried over to the slave (neat huh?), FUNC just enables the channel w/o mixes (ie like most buddy boxes).

One thing to remember is to enable the trainer function for it is off by default, and resets itself to off under certain circumstances.

Bax and Krysta usually are pretty good in answering, however you may have gotten them on a bad day since it was after our 4th of July holidays. Also, when you posted your second message, that kinda killed the chance for an answer. You'll see in a lot of posts that they usually scan for questions that have no replies.

Good luck!