Hello, I am a scanner enthusiast and also am a fire explorer, while learning more about the people I listen to, their pagers can optionally only be set off if there is a certain tone pattern such as two sequential tones, my question is why can’t scanners do this, specifically the BCD436HP, I thought it was impossible to do this since you couldn’t hear a solid noise with a digital signal, is there a way to make the scanner a pager? Thanks for any help and understanding more