It is possible. For me, I have a zone set for them and if I want to, I can just set it to Scan mode. Just put a new zone on the programming software and make sure it stays in the scan list. Then, you can set a key that you press in order to activate the scan. Unfortunately, the sound that is activated during the 1050hz tone is relative to the volume, so you'd probably hear the SAME codes being broadcast anyways. It may be a pain, but getting a Midland HH-50B and putting it in your pocket on alert mode while you carry your BTech is probably the best option.