Originally Posted by ahwman
He also measured my signal right before the TiVo box with an SNR of 37, so either the TiVo is misreporting or it's amplifying the signal somehow.
I think the Roamio does amplify the signal.
In my living room, using the same coax, my Premiere 4 XL has a SNR of 34-37, whereas the Roamio was 44.
Personally, I don't think the Roamio is misreporting it. When the SNR was 44 on the Roamio, it was impossible to get the cable card paired. I put a 4-way splitter in-line, which dropped the SNR to 38, and then the cable card paired perfectly.