Hello lehighbri
First, ***big*** thank you for testing, and sorry that it didn't work out right first time.
Your instincts were correct - something was definitely wrong.
That problem should be remedied now with the new version of the patch (v1.1) attached to the first post.
If the scan behaves that way again (which it shouldn't!), you should be able to hit "cancel" to stop after 15 minutes. At least one of the first 200 channels scanned should be valid.
The 3..1000 scan range is a total guess on my part so it could absolutely be useful to enter a scan range - I'll add it to my "to-do" list.
mm
Now the opposite happens with v1.1... it scans at warp speed and I get the same ModNotSet: No signal. See attached for the logs.