[rabbit73]

I have a 15 w preamp

I understand most of your answers, but not about the preamp. Is there a preamp at the antenna or a distribution amp inside? What brand and model?

Any trees in the signal path?

Does your Tivo Roamio Diagnostics Screen look like this?



If yes, what it tells you about signal strength, SNR, and uncorrected errors will help you.

tivo signal strength of 50 on WB stations

Which Wilkes Barre stations? I don't think 50 is good enough; it wasn't for mullignaman on his thread:

question regarding overamplification
http://forum.tvfool.com/showthread.php?t=15025

This was his setup before improvements:



that gave these readings:

Originally Posted by mulliganman

I went into the DVR diagnostics menu on the Roamio to get some info for all channels. Here is what it shown (as setup in the diagram I posted):

Channel 3-1 signal strength 55%, 22 dB SNR, RS Corrected 0, RS Uncorrected 66

Channel 3-2 signal strength 55%, 22dB SNR, RS Corrected 0, RS Uncorrected 60

Channel 3-3 signal strength 57%, 23 dB SNR, RS Corrected 0, RS Uncorrected 81

Channel 10-1 signal strength 67%, 27dB SNR, RS Corrected 0, RS Uncorrected 30

Channel 21-1 signal strength 52%, 21 dB SNR, RS Corrected 0, RS Uncorrected 132

Channel 21-2 signal strength 52%, 21 dB SNR, RS Corrected 0, RS Uncorrected 30

Channel 21-3 signal strength 52%, 21 dB SNR, RS Corrected 0, RS Uncorrected 60

Channel 27-1 signal strength 60%, 24 dB SNR, RS Corrected 0, RS Uncorrected 6

Channel 33-1 signal strength 60%, 24 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 33-2 signal strength 60%, 24 dB SNR, RS Corrected 0, RS Uncorrected 120

Channel 33-3 signal strength 60%, 24 dB SNR, RS Corrected 0, RS Uncorrected 45

Channel 49-1 signal strength 45%, 18 dB SNR, RS Corrected 0, RS Uncorrected 6

Channel 49-2 signal strength 45%, 18 dB SNR, RS Corrected 0, RS Uncorrected 0

after he made improvements, it looked better:

Originally Posted by mulliganman

I believe the coax from the 91XG to the attic amp to be less than 25 feet, so I made the following change as you suggested: 91XG > downlead > LNA 100 > AC7 ch 49 input. The C2V went into the other input of the AC7. I did a rescan, then as soon as I had a chance a little while later I went back into the DVR diagnostics menu on the Roamio. Here are the results:

Channel 3-1 67% signal strength, 27 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 3-2 65% signal strength, 27 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 3-3 67% signal strength, 27 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 10-1 72% signal strength, 29 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 21-1 72% signal strength, 29 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 21-2 72% signal strength, 29 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 21-3 72% signal strength, 29 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 27-1 72% signal strength, 29 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 33-1 67% signal strength, 27 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 33-2 67% signal strength, 27 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 33-3 67% signal strength, 27 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 49-1 62% signal strength, 25 dB SNR, RS Corrected 0, RS Uncorrected 0

Channel 49-2 62% signal strength, 25 dB SNR, RS Corrected 0, RS Uncorrected

I was surprised to see improvements in signal strength and the RS Uncorrected numbers across the board.