I picked up an Acutrac 22 Pro signal meter after trying one with an SD receiver in our trailer. It works fine with an SD receiver here in our home but when I hook it up to a 505 or the 630 I get no signal indication. Will this be normal? Anybody know why? I guess I could see the 2 cables into the 630 causing some type of problem but the 505 is a single cable. Appears like HD receivers are different as far as providing power to the meter???