Greetings,,,
Quickest way you might be able to easily test it, or at least one way, would be to start a sequence, maybe a special, easy to see sequence. Send the signal out to one receiver. Then use that receiver to connect to a second transmitter in repeater mode, on a second universe. Pick up that signal where you are transmitting from initially. Then connect up to a LE, etc.
So, you would actually be testing two transmitters and receivers at the same time. Double the test for the same distance.
You could then set back in your living room, office, etc., and watch at your leisure, looking for issues. That would give you real world info without building anything extra, for those who want a quick check that things are working, even during their show, which may be out of sight.
Keith