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TV signal + Fast Speed = Bad picture

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  • TV signal + Fast Speed = Bad picture

    I'm using my radio's antenna as my TV tuner's antenna. It works great while the car isn't moving. But as soon as I reach speeds faster than 30mph the picture starts to go; the faster I go the worst the picture gets. I've been trying to find a fix for this, but have come up empty handed. Any suggestions.
    ODYSSEY

    Originally posted by Tidder
    Hey, as long as it's not any particular race I'm offending, I can stand to be a pedophile.
    All information expressed in this post is my opinion, and should not be regarded as a statement of fact.
    Digital-Car UK|

    (\__/)
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    (")_(")

  • #2
    2 things to think about... i dont know if im way off here, or if this is going to make sense.

    first of all, is it related to electrical noise. remember when we all had cheapo radios in cars, and the electrical nosie (whine) would increase with the speed of the car.....

    or perhaps, the radio antenna isnt designed to pick up signals within the broadcast frequency range of television. i know that i have never seen a car/van/limo that has a tv in it, that doesnt have one of those boomerang antennas. you might have to look into getting an antenna specifically designed for television frequency reception...

    or perhaps where you live, the tv signals only travel at 30 mph. after all, tv's dont usually move

    ~mike
    Single Member of the "1000 Post and No MP3 Car" Club
    PROJECT ON INDEFINATE HOLD... BOUGHT A HOUSE
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    • #3
      check into getting a radio noise supressor. you can get those adapters that slip inline with your antenna cable to remove alternator noise and whatnot, that should help you a lot. Alternatively try using a whip antenna instead.
      IN DEVELOPMENT -- '96 Mustang, lilliput with PII/450 laptop, custom DC-DC power supply, 60GB; Garmin GPS; 802.11g; compact keyboard, small graphical LCDs, OBDII.

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      • #4
        Hi,
        The reason is simple :You cannot watch TV while driving . Its technically (exeption is free field ) impossible !. Due to reflections by buildings trees etc etc - the signal doesn't stay proper nor level-equal- .
        Also the Radio Antenna isn't designed for TV frequency range - but thats the minor problem in this case .
        The only way to watch TV incar while moving is watching Digital TV

        Sorry


        Regards

        Felix

        ( Student of Media - Technologies )
        =>> Carpc Version2 -- Epia M 10K based<<=
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        • #5
          umm, unless you plan on driving at a significant percentage of the speed of light, then you can get a TV signal in car while you're driving.

          Check out this search at google or this company (sells special antennas $17-$34) or this company that sells another one.

          Additionally the type of antenna is not very important at all. Haven't you ever used a piece of clothes hanger as a makeshift antenna? You can use anything from 6 guage to 20 guage wire for an antenna, as the whip type of antennas use very very fine wire and some antennas use very thick wire. you can get antennas of any shape and/or size as well. Although it is true that there are certain sizes and shapes that will work better, you can get signal on just about any piece of wire that you can try. Most antennas that come with TVs are of a telescoping nature as well, again different style than a whip or solid wire antenna, and it works just fine as well. In a pinch I've even used an extension cable as a makeshift antenna

          Try my suggestion about a radio antenna noise filter first (maybe go to a place that you can return an opened product if it doesn't help you). Additionally try to use a normal TV antenna and see if you have any problems while driving. I've watched handheld TVs while walking, in a car in downtown Toronto and while on a bullet train and they work fine.
          IN DEVELOPMENT -- '96 Mustang, lilliput with PII/450 laptop, custom DC-DC power supply, 60GB; Garmin GPS; 802.11g; compact keyboard, small graphical LCDs, OBDII.

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          • #6
            too bad rat shack doesn't sell more mobile antennas for like tvs, the guys by my house let me drop my drivers license with them and I walk in and out of the store usually trying things out in the jeep

            1997 Jeep Wrangler Rugged Waves


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            • #7
              I hate to be negative here, but I have to agree with Felix99, TV reception will always be poor if your moving, its the nature of the signal.

              If you think that using a antenna designed for TV reception will help at speed then give it a go. However, my in-dash display uses two seperate whip antennas that are both electronically boosted and are Diversity, and the picture is crap at speed.
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              • #8
                Originally posted by phil.45
                I hate to be negative here, but I have to agree with Felix99, TV reception will always be poor if your moving, its the nature of the signal.
                In my experience I have to agree here. Even small portable TV's with their own built-in antennas have problems at speed, and work just fine when not moving.

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                • #9
                  Yeah, as long as the vehicle is moving your reception may be poor but, there is always DVD, video tape, and VCD

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                  • #10
                    and Divx. and you can download lots of TV shows from kazaa.
                    Project AutoBoxen: Coming along, almost ready to hook up in the car.
                    Celeron 500, 192mb ram, 8gb hdd, other stuff.
                    '91 Mazda 626: Its free, so ill use it.

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                    • #11
                      I'll try an indoor antenna and setting on the back self. I don't see why tv can't work at high speeds, FM radio does. FM is inbetween channels 2-6 and 7-13 or 55-88mhz and 174-220mhz. How many people are running tv tuners in their setups?

                      BTW: I have lots of movies and shows on HD, but only a 10GB HD.
                      ODYSSEY

                      Originally posted by Tidder
                      Hey, as long as it's not any particular race I'm offending, I can stand to be a pedophile.
                      All information expressed in this post is my opinion, and should not be regarded as a statement of fact.
                      Digital-Car UK|

                      (\__/)
                      (='.'=)
                      (")_(")

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                      • #12
                        From my personal experience with SONY add on XT-40V TV tuner, anything that you can stick into the antenna hold will pick up stations. But when you're moving the signal fades in and out due to buildings and other crap. Once you get out in the open then you can pick up clear stations no matter how fast you're going. I get perfect reciptions in the valley on I-5 on the way to LA. Once I get to the grapevine, the signal fades in and out due to the mountains. The stations the tuner picks up are from Bakersfield which is about 35 miles from the grapevine.
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                        • #13
                          I have a european spec BMW OEM TV tuner in my 01 M5. It has BMW OEM amps that connect into the rear defroster grid and uses that as an antenna. Reception is very good when standing still but gets a lot worse when driving. Not a big deal as I always switch it off if I'm going over 20 mph.
                          99 C5 vert - not stock - now with no PC :-(

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