DVDR3575 Using the RF/Coax Passthru as a Built-in No-Loss SplitterNote: This info applies to all DVDRs except for VCR/DVD combo units... their RF in/out works differently when the VCR is ON, so better to keep them out of the coax chain to your TV. Also, not all DVDRs have an "active" RF passthru.
With the 3575, you don't need a splitter to get separate incoming signals to other components, including your TV. The 3575 has an active
RF passthru thru its ANTENNA IN/OUT loop...as long as the 3575 is plugged in (doesn't have to be on), it's passing thru the incoming cable/ant signal with either NO loss or a slight gain in signal strength.
A splitter has a minimum signal loss of -3.7dB from each output or, if a cheap unbalanced splitter, -3.7dB from one output and -7.4dB from the other. With a strong signal, that loss is not a lot, but every dB counts in some areas and in some systems. String a few splitters together to cover a whole house, esp. those with more than two outputs which have higher -dB loss, then you ARE talking about significant, cumulative signal loss.
Here's where many people don't take advantage of the pass-thru nature of their DVDR's ANT in/out coax loop... one less splitter everywhere you have a DVDR (w/o a VCR).
I've got straight analog cable, no box, with a 3575 and Pio 640 "daisy-chained" (connected together in series) on the incoming coax to the TV. My 3575 is first in the coax chain to take advantage of it active RF passthru.
My Pio 640's RF in/out loop is passive, so no signal boost from it. In fact, a passive loop reduces signal strength a little...less than -1dB, as reported by a testing web site tech.See this post for more info on the test for active/passive passthru.
EVEN IF all your channels are scrambled, making the 3575 tuner useless, you should still connect the 3575 1st in line for the coax feed since its active passthru will add a little boost to the signal for downstream components.