Arnold
When I have only Postwar or Proto 1 trains on my layout with the DCS Remote control Set hooked up, I won't be using the Remote Handheld so that will be turned off, and I assume I simply turn on my Z4000s and run the trains the old fashioned way. Is that correct?
Yes that is correct but no power will go thru the TIU unless it receives power from Fixed one or the AUX PORT.
I see no on/off switch on the TIU, is that correct?
Yes that is correct see answer I just gave above this question.
Arnold
In my little world, I leave this troubled world behind.