It is true that a passive splitter will reduce signal power by at least 50%. (Conservation of energy.) However that won't necessarily reduce signal readings by much.
A couple of reasons for this: first, because the variance between your strongest and weakest signal could easily be many orders of magnitude, signal strength is usually measured on a logarithmic scale (decibels), and that >50% loss is only about 3.5 or 4 decibels.
Second, the signal meter in boxes like the Pal usually measures not only raw strength but also signal quality (error rate). Chances are, the quality didn't change when you boosted the strength by a few decibels, so the small change in signal strength is diluted even more by the lack of change in quality.
So, since the Pal's signal readings jitter a bit naturally, it's likely that a 3-4 decibel change wouldn't be noticeable on most stations. You might see an improvement in "on-the-cliff" stations.
Last edited by JHBrandt; Today at 07:41 AM.
Reason: Fix typo