Can anyone who has this scanner tell me about the backlight? I want to know if it can be set to stay on constantly, and if it can be set to light when the squelch is broken. I have a RS pro-137 which I believe has functions similar to the 346XT, and that backlight will not stay on more than a few seconds. I'm getting ready to purchase a new scanner and this function is very important to me. I'm also looking at the RS Pro-107. Thanks for all replies.