[jacquesm]

That's a pretty high horse you're on. Again, I've been in the salesperson's position, and it would have gotten no more than a laugh and a powercycle out of me, and probably a conversation with where he found out so much about a system that I was supposed to know like the back of my hand.

You don't demonstrate spectrum analyzers, especially programmable ones if you don't know how to use them in anger.

I went to a music fair a while ago (ok, a long while ago meanwhile) to watch some gear demonstrated, the people manning the booths were musicians, and they were competent. That's the sort of interaction you strive for when you pick the people to run a booth at a tradeshow.

Otherwise the answer to every question about the device is going to end up with 'I don't know'. And that's potentially a lost sale right there.