[mythtv-users] Good signal strength? was: Re: Alternative to Silicondust HDHR3-6CC-2X3?
david.litchman at gmail.com
Thu Sep 6 19:12:55 UTC 2012
On 9/6/2012 2:49 PM, Joseph Fry wrote:
> Be careful here, I bought a power splitter and it actually
> caused the loss of some channels.
> One of which my wife likes to watch.
> I had to pay to have the CCo come out and raise the power
> enough to overcome the passive splitter losses.
> Needless to say, this did not make me a bigger fan of the CCo.
> There seems to me some wonderful and creative engineering
> going on here.
> Some of the main channels are very fussy about the plumbing
> downstream from the cable while
> the junk channels would probably be OK using old speaker wire.
>> My TV provider is Comcast, if that makes a difference.
>> mythtv-users mailing list
>> mythtv-users at mythtv.org <mailto:mythtv-users at mythtv.org>
> I bought an amplified splitter off eBay. I have a 2-way passive
> splitter at the ingress, with one cable going to the modem and the
> other the amplified splitter. From there all my runs go direct to
> their respective devices, including my HDHR prime. It works quite
> well for my home setup. When I get home I can post the
> manufacturer and model of the splitter, if anybody cares.
> In a perfect world the only cables going to my TVs would be
> Ethernet, but the tech isn't quite there yet, and with my penchant
> for watching live TV combined with the copy-protection flag crap
> that so many channels use, it may never happen.
> Putting the amp at "the ingress" is the safest place to put one...
> using it further down the line, after having already reduced the
> signal with splitters and long cable runs, will often result in
> reduced signal QUALITY, which is far more important than signal
> strength. Obviously if your signal coming in is very strong to begin
> with, you may get away with it, but typically the cable companies only
> put out a signal strong enough to go through 7-10 dB worth of loss,
> which will occur with a 4 way split and a long cable run. Amplifying
> the signal after a 7dB drop will likely result in a high strength but
> poor quality signal... at least in my experience.
Looking at my existing InfiniTV PCIe, the signal strength for all four
tuners varies from about -4 dBmV to -5 dBmV while idle, and around -2 to
-3 dBmV while playing a channel with right around 35 dB signal to noise
level. Is that good? Bad? Indifferent? Am I likely to run into any
problems if I split it two, possibly three ways?
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