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4 posts

Wannabe Geek


# 207981 22-Jan-2017 07:00
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A while ago I had the aerial changed as the TV was only showing MediaWorks channels and TV1 channels were distorted. Found out it was a old aerial. It fixed the matter for a while but it is back. Problem has worsened now as a I can only get MediaWorks channels again but now all channels get distorted on windy or calm days. A electrician looked at the new aerial and said it had been loose so tightened it but feels that because it's a 4g one it needs to be downgraded to stop this problem?! But had also commented that it could be the splitter! Which is right? I played with the cords at one point and got the channels back so why am I feeling the wring from the aerial to the TVs needs to be replaced as that could be the prob? If this was the prob because it was an old aerial before why would it be the aerial this time?! Would appreciate everyone's positive opinion ☺️

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Fat bottom Trump
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  # 1707288 22-Jan-2017 08:47
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Not sure I get the bit about the 4G aerial. I don't think that has anything to do with TV reception. What do you mean by the channels getting distorted? What does the distortion look like? You say windy and calm days. What do you mean by that? Is reception affected by wind or not? If so, a loose cable connection is the problem. Your description of things isn't very clear, but it sounds to me like you might be getting reception only from the cable and the antenna isn't doing anything at all. 

 

 





I reject your reality and substitute my own. - Adam Savage
 




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Wannabe Geek


  # 1707291 22-Jan-2017 09:03
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Rikkitic:

Not sure I get the bit about the 4G aerial. I don't think that has anything to do with TV reception. What do you mean by the channels getting distorted? What does the distortion look like? You say windy and calm days. What do you mean by that? Is reception affected by wind or not? If so, a loose cable connection is the problem. Your description of things isn't very clear, but it sounds to me like you might be getting reception only from the cable and the antenna isn't doing anything at all. 


 



Sorry if I haven't explained it right!!
The sparky said it was an aerial that covers all channels etc 4g, its high tech lol now I'm thinking yo myself 'right' lol
What I mean by channels getting distorted is fuzzy, looking cracked on the screen. It happens when it's windy or not - don't know how else to explain that!
So do you feel that it could be the cable/wire from the antenna to the Tv that is the prob?!

 
 
 
 


Fat bottom Trump
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  # 1707302 22-Jan-2017 09:34
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Sorry, I still don't get it. As far as I know, 4G has nothing to do with television reception. 4G aerials are designed to work at cellular frequencies for phones and also RBI Internet. TV uses the UHF spectrum (or satellite) and the antenna is completely different. I am not an expert on this but one cannot be used for the other. The only antenna that would work for TV reception is a UHF TV antenna which does cover all channels, but I don't understand the references to 4G. As far as I know, that is something entirely different.

 

If you say your reception problems happen whether it is windy or not, you are simply saying they happen all the time. The reference to wind is unnecessary and confusing.

 

Digital television tends to be all or nothing. Usually if a signal is weak, you may get pixelation of the image, or sometimes blocks of colour as the image breaks up. I'm not sure if that is what you are describing. 

 

If you are in a good reception area, you may get some reception even without a proper antenna. I would suggest disconnecting the antenna from the back of the TV and connecting any piece of wire a couple meters in length and try holding it in the air and moving it around on the channel that works best. If you get any signal that would indicate that you are in a good reception area and your antenna is not functioning correctly.If you can't get anything then at least you know the antenna is doing something.

 

  





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  # 1707312 22-Jan-2017 10:10
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Can you post a picture of your TV aerial.

 

If the aerial is installed correctly, then it looks like you have a cabling problem between the TV and the aerial. It may just be a bad join, or the cable has deteriorated because of damage or water.

 

Try running a new cable from aerial to TV, if you can.

 

Best option would be to get a proper aerial installer guy around. They will have the correct gear and knowledge to get it sorted.


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  # 1707318 22-Jan-2017 10:36
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 Reference to 4G may simply mean that antenna has a bandpass filter to reject reception of signals above 720 MHz.

 

Given the fault in this case could be at any join or the cable run itself the the quickest way to get it resolved is to call an antenna installer who has the necessary equipment to measure the signal strength at various points in the circuit. You can test the fly lead (from wall plate to TV) for short circuits with a multi-meter or simply see if the Belling Lee plugs fall off when you pull on them, if so replace.





Ross

 

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Wannabe Geek


  # 1707567 22-Jan-2017 18:16
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Hi guys,

I just might ring in a proper tv specialist!! Thanks for your help!! I can't watch anything but bits of choice tonight!! Luckily I'm tired and will be having an early one!



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Wannabe Geek


  # 1707568 22-Jan-2017 18:17
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Can anyone recommend someone in Palmerston North? Thanks

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  # 1710819 27-Jan-2017 19:58
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Rikkitic:

 

Sorry, I still don't get it. As far as I know, 4G has nothing to do with television reception. 4G aerials are designed to work at cellular frequencies for phones and also RBI Internet. TV uses the UHF spectrum (or satellite) and the antenna is completely different. I am not an expert on this but one cannot be used for the other. The only antenna that would work for TV reception is a UHF TV antenna which does cover all channels, but I don't understand the references to 4G. As far as I know, that is something entirely different.

 

 

A little OT, (but just to expand your knowledge @Rikkitic). The 4G Band 28 (ie 700MHz) frequencies are indeed working in what was the upper end of the TV UHF band which covered from around 500MHz to around 800MHz, (known as Channels 26 - 62) In the analog days, broadcasts were made across this entire range, as were the initial digital broadcasts after analog shutdown. Then the 're-stack' of the digital channels happened where all the digital broadcasts were re-positioned into the sub 700MHz range, (Channels 26 - 49), so as to free that space up for use in mobile networks.

 

You can get '4G compatible' TV antennas that have a low-pass filter to only allow the sub 700MHz frequencies, thereby eliminating any possible TV interference coming from 4G transmissions. 


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  # 1710823 27-Jan-2017 20:27
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Thanks for the info. Spyware also pointed that out. I didn't think of the overlap or the need for a filter. Hopefully pollypuki has it sorted by now. 

 

 





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  # 1710836 27-Jan-2017 20:59
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I saw some inline 4G filters at bunnings. And they are good with returns if it doesnt help you out. Just make sure it is before any amplifier





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