CAB1L and PowerMaster for a test track?

The Lionel Legacy Powermaster requires a command base to function, it doesn't receive commands directly from a CAB1.  The CAB1L communicates on 2.4ghz, so it won't talk to the older TMCC PowerMaster either.

To do what  you listed, you need to add the BASE1L to that configuration.

GRJ, thanks, If I connect the CAB1 base to the outer rail connection can I then just turn the knob on the CAB 1L remote to adjust track power?

ChooChoo1972 has a Cab1L base so the Legacy Powermaster will receive TMCC commands via the RF signal.   This is also true for the original Cab1 base.

... from the manual:

"Connect the “U” terminal of a LEGACY Command Base (#992 from set 6-14295) or a LEGACY
BASE-1L (6-37156) to the “U” terminal of the PowerMaster or to the outside rail of the track."

For conventional operation, slide the CMD/CONV switch to conventional.   Use the red knob, boost, brake, dir, etc. buttons.  The manual documents all the quick button presses to activate PS-1 features.