i want to use a scanner with tracking collars on my 2 hounds as a backup. The frequency is 217 so I know the scanner must have that band. My question would be which scanners give you the audible tone that the collars are putting out. I don't know what that feature is called to look for it. I saw somewhere they were talking a CW or something like that any advice would be appreciated. I know looking at some dog sites people use the Pro94,95,97 seris for this