Barry,
though you did say to disregard this question, I will answer simply because it will make the archived messages more useful to other people at a later time (and because I have been looking at this in a 7B92, so I think I understand how the free-running feature is supposed to work).
In AUTO mode the sweep will trigger when either of two things happens: 1. when the trigger condition is met (and the trigger circuit is in the ARMED state), or 2. when a timer (an RC circuit in the 7B92) finishes (and the trigger circuit is in the ARMED state). This means that you get a short pause between free-run sweeps if the trigger conditions are not met, so they will not necessarily be happening at the specified sweep frequency (in other words, if you set a sweep speed of 1 ms/div, so that the sweep takes something like 10 ms, the actual free-run rate may be something like 20 ms, or even slower depending on the auto-sweep timing).
-- Jeff Dutky
