HI all, new to this site, but I am going to jump right in and ask for advise with a problem that a fellow tech has called me on. He has installed numerous standard receivers and they show no signal, but yet checking for signal strength at the receiver end, has been high 90's...yet when receiver is hooked to this line no signal is found...I find it hard to believe that on both occasions taking 6 to 7 receivers off his truck, that they all may be bad...can a substandard electrical service be the cause of this or is there maybe another explanation that we are not seeing... Thank you for checking this out and hope to hear if anyone else may have encountered this situation... Fast