Is there any kind of signal-strength indicator with the built-in tuner on the Mitsubishi Platinum series RPTVs? I have excellent OTA signal reception with a cheap antenna and mediocre reception with the silver sensor. Everytime the streetcar passes in front of my apartment my signal drops out with either and I'd like to see what is actually happening to my signal in each of these scenarios. Ultimately I'd just like to be able to watch the signals without interuption. I live 1 mile from the broadcasting tower in San Francisco so I'd also like to know if I'm actually overwhelming the tuner and if an in-line attenuator might do the trick. Any help or advice would, as always, be appreciated.