I have been using my bc246T for over four years with no problem. Now, it appears to be skipping over a whole list of frequencies. I have Sacramento Fire and County Sheriff on one system and Sacramento PD on on another. It goes to the system for Sac PD for less than a second, then back to the other system where it is scanning correctly. Every time it goes to the Sac PD system, it switches back to the Sac Fire/County system almost immediately. I'm wondering if I have inadvertently changed a setting that makes it skip the first system. Any input would be appreciated. Thanks.