Hmm...I have two XTVA's and a UHF XTS3000 did not work in it. The XTVA's I have use the older W3 HHCH and the display did not convey the radio info (Nothing appeared and it did not light up). I believe when I keyed the radio it beeped as well. I did not keep the 3000, so I did not investigate further, especially just to see if it could receive as you want to do.
Note:
- I have two XTS5000's and they work fine in the XTVA's
- The XTS3000 worked fine on its own.
- I do not have a TX/RX problem using the antenna adapter and I use one of them at home...with an external antenna up in the air to make the most of the lower power to hit the repeaters.
As JimD56 pointed out, a mobile radio may be a better option. I use an XTL5000 in my vehicle. Still, if all you want to do is listen perhaps just use a scanner, or just connect the antenna directly to your 3000 as you considered.