All ATC radar has software built in to suppress returns from on the
airport surface. We set ours so we see no transponders within 1/2 mile
of the antenna.



Russell Kent wrote:
Newps wrote:


And mine never gets turned off. If the avionics master is on the transponder is on. There's
no reason to turn it off if it is operating properly.


I've heard (but never directly experienced) that controller may request that your transponder
be switched to standby once you're on the ground. But short of that, I'd have to agree with
newps.

Russell Kent