Hello, I recently bought a new Whistler 1065 scanner as a hobby to listen to the emergency corporations in my city. I realize that many use motorola radios with the P25 system and on a single frequency I can listen to many companies, I want to make a filter to only listen to one but I don't know how .... I was looking for videos but nobody explains how to fix my problem and the canner manual is so short ... can someone tell help me out or give a tutorial, I would really really appreciate it.