Re: Splitters and amps

On May 15, 12:28 pm, wbertram <wbert...@xxxxxxx> wrote:
G-squared wrote:
On May 15, 5:15 am, Steve Cutchen <max...@xxxxxxxxxxxxx> wrote:
In article <1179193034.755867.256...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, TM

<t...@xxxxxxxxxxxxxx> wrote:
My setup right now is comcast hdtv with cable/ip phone. I have a 4
way bi directional amp (radio shack) that feeds the phone, computer,
bed room tv (non-hdtv) and family room (hdtv plasma). All runs are
home runned to the basement where the main cable feed is (and where
the amp is.)
My question is what is the best way to add another TV. Can I split
one of the four outs from the amp in the basement using a traditional
cable splitter and then run that to two tvs? I tried this with a
splitter I had laying around the house but it didn't work.....
Thanks,
TM
That should work. Be sure you are using a splitter that is made for
cable frequencies, not anenna frequencies

I've had a spectrum analyzer on my cable. There are signals from 54 to
750 MHz. My OTA antenna has signals from 54 to 800 MHz. How are they
different?

GG

Difference 1: Frequency Assignments
Cable typically has 125 (more or less) 6MHz wide channels in
essentially contiguous frequency assignments from 54MHz up to around
800MHz. OTA presently has 68 6HHz wide channels in 3 groups, 54 to
88MHz, 174 to 216MHz, and 470 to 804MHz.

Between the two, only channels 2 thru 13 share the same frequencies.

Difference 2: Digital Modulation Standard
While OTA and Cable use the same modulation standard, as specified by
the NTSC, for analog channels, they use different modulation standards
for digital. Cable use a digital modulation specified as QAM, while OTA
uses the digital modulation specified by the ATSC.

Are you implying that the splitter is actually a band separator? The
splitter is a broadband unit. The fact that there are 'holes' in the
spectrum of OTA vs cable is of no consequence. The modulation method
isn't an issue either. Flat response is required for _all_
modulations, even Bob's cherished COFDM.

So since the bandwidth is the same, I repeat, what is the difference
between an OTA vs cable splitter? Answer: none at all.

GG

.

Relevant Pages

  • Re: Splitters and amps
    ... way bi directional amp that feeds the phone, computer, ... splitter I had laying around the house but it didn't work..... ... My OTA antenna has signals from 54 to 800 MHz. ... Difference 2: Digital Modulation Standard ...
    (alt.tv.tech.hdtv)
  • Re: Whats Really Holding HD Back? 3
    ... The bad modulation keeps the educator, retailers and manufacturers out of the US market. ... The only OTA receivers in quantity are those required by the FCC and no one is educating the buyers about the fact they are even there. ... You keep switching your points back and forth between DTV and HDTV as it suits you. ...
    (alt.tv.tech.hdtv)
  • Re: Whats Really Holding HD Back? 3
    ... They can charge for programming delivered with OTA spectrum. ... And what advantage does USDTV offer for the consumer over cable or satellite? ... There is some advantages for the broadcaster, offset to some extent by the cost of putting in new broadcast equipment. ... But the key is a RELIABLE modulation. ...
    (alt.tv.tech.hdtv)
  • Re: Death of OTA Broadcasting
    ... modulation would have on "incentives" to invest in OTA would be. ... Don't know about grandmothers but millions are buying OTA receivers either stand alone or in HDTV sets. ... And in these countries retailers are advertising, broadcasters are advertising, everyone is on board. ...
    (alt.tv.tech.hdtv)
  • Re: Does turning a volume knob create sidebands?
    ... amplitude modulation. ... The snag is here that a volume control cannot do ... volume control will generate new frequencies from the input. ... square wave modulation (a la Dalek voice style sidebands). ...
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