Radio works without Antenna?

Does the SVX have a diversity antenna system or just the motorized mast.

I recently damaged my antenna mast and the antenna motor was skippng so I pulled the antenna stem out and broke it off and then fed out the pusher plastic and cut it off and the radio worked fine. I had a local car audio shop tell me they could put in an after market so I said get one but when it came it was the wrong size. It appears there is no aftermarket replacement. They of couse pulled the entire motor assembly before realizing anything but when I picked it up tonight the radio ( Pioneer double din about 45 days new) still worked fine even after the 50 mile drive home, including distant fringe stations. No static isuues and it sounds better. Also had new Pioneer door speakers put in today.

I can't decide if I want to bother ordering a new motor and mast. I will figure out something for the mast hole if I take this route.

Any thoughts?