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HDTV antenna recommendations

Discussion in 'Electronic Repair' started by [email protected], Jun 8, 2006.

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  1. Guest

    There are indoor ones, I'm having a hard time seeing how these could
    work. I have an albiet old, functioning outdoor up in the attic. It
    splits in two, then into four off the amp downstairs. The amp is quite
    old.

    Now I have seen ATSC at work, where the reception is worse. I asked the
    boss and he told me there are two amps. They were installed decades
    ago, and are of course not "HDTV ready", so I am assuming such a thing
    will actually work.

    Now I want to feed into a PCI ATSC tuner in a computer, and I know
    these things need a helluva lot of signal. Even on NTSC it is snowy,
    and can't aquire any ATSC channels. I know they are here, about thirty
    of them.

    Is it even worth a try to throw in a really good amp with a high MOL
    and let everything else be taps instead of split ?

    And, if this doesn't get us ATSC, or acceptably ATSC, should I even try
    an indoor ? On NTSC I expect notoriously crappy reception, but then
    multipath etc affect this differently. Do the indoor ATSC antennas work
    even decently ?

    The added problem is that it is a PCI card. There is simply not enough
    room for a high gain front end. I understand this and figured I might
    have to deal with it, but I thought our regular antenna would at least
    get something. I even fed the whole output of the amp to it, still no
    ATSC. NTSC was still snowy also.

    This card was not very expensive, I have no problem feeding it with
    whatever it needs, but I do not want to go buy the wrong thing and have
    it not work. I want the first thing I buy to work.

    If it matters, I live in Cleveland Ohio, near Harvard and Denison.
    There is a cliff almost directly to the south of me, towards Parma,
    where the towers are. My current antenna recieves all local channels
    acceptably. If it is purely a matter of signal strength, perhaps all I
    need is a kickass amp.

    Thanks for any help on this. I would like to see it work before the
    warranty runs out of course.

    JURB
     
  2. Vey

    Vey Guest

    Here is the big "secret" of all time. There is no difference between an
    old analog antenna and a new "digital" one other than one is old and one
    is new. Make sure that you clean up the contacts, and run new wire (I
    like the quad shielded cable from Radio Shack) to the antenna. That's a
    good idea no matter what you do.

    I have several PC Tuner cards. Some are analog, one is HDTV. All have
    the same problem, they need a good, clean, strong signal because they
    have been desensitized. PC's make a lot of RF noise, so the cards are
    desensitized to avoid picking up that noise. Mast mounted pre-amps can
    help amplify things for both, but sometimes they can make the digital
    signal worse.

    Having a mountain between you and the transmitter could be a problem.
    Where the analog signals would "bend" around it (and maybe you would see
    a shadow, or double image) digital doesn't bend.

    Keep fiddling.
     
  3. David

    David Guest

    Nonsense! Whether signals 'bend' or not is determined by the transmit
    frequency. What is modulated on the frequency is irrelevant to 'bending'.

    David
     
  4. Arfa Daily

    Arfa Daily Guest

    Unfortunately, your contention that there is no difference between analogue
    and digital antennas, does not hold up this side of the pond. Many digital
    multiplexes caried by UK transmitters, are split from one end of the UHF
    band to the other, at the same site. Thus, if you point an existing group A
    antenna at an existing group A analogue site, and then try to receive the
    digital multiplexes from that site, you may well find that there's nothing
    like as many channels there as you expect, as you are missing a whole
    multiplex up in group C. So the big secret of all time over here, is no
    matter what the fancy TV adverts tell you about how wonderful digital is,
    and all you've got to do is plug in your STB or digital-ready TV to get it,
    in many parts of the country, it simply isn't true, and you're going to be
    up for a new 150 quid ($240) wideband digital antenna. Just to cap it off,
    most of these are the ugliest crossed element antighost ( why though ? I
    thought this digital TV was supposed to be immune to multipath ) or multi
    arm log periodics that you've ever seen. Twice the size of a nice little 10
    ele analogue.

    There is no reason that digitally modulated signals should be any less
    susceptible to bending around objects, than analogue ones, as far as I am
    aware. This assumes of course that they are in the same band. In actual
    fact, I think that the bending around mountains usually takes place across
    the top of them when they have a sharp ridge, and is known as 'knife-edge
    refraction' but I may be wrong there. As I recall, this effect is better
    established at VHF than UHF.

    Arfa
     
  5. Vey

    Vey Guest

    Good thing the poster mentioned ATSC rather than DVB, so we wouldn't get
    confused, eh? First sentence, second paragraph.
     
  6. Arfa Daily

    Arfa Daily Guest

    Yes, but you made the blanket statement that there is no difference between
    digital and analogue antennas. I made the statement that there is, and
    qualified that with " this side of the pond " followed by a reference to UK
    transmitters, lest anyone over here reading your statement, should be misled
    by it ...

    Arfa
     
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