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348 posts

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# 21231 20-Apr-2008 12:24
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I have managed to get the signal to the point where the UHF fta channels have no snow whatsoever, prime and maori tv, juice tv and trackside all appear perfect except for quite a noticable ghost. Used a masthead amp to get rid of the snow (Did this make the ghosting worse?) Picture was so bad before couldnt notice a ghost. This being the only problem with the uhf reception i can only assume this is the cause of my picture break up on my PC. I know it is not the pc settings as they work in other locations.

How do i get rid of the ghosting enough to get rid of the breakup? I guess i will have to try playing with the aerial some more, perhaps sky tower with vertical polarisation might help, or maybe just angling it upwards a bit.

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  # 125062 20-Apr-2008 13:33
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Bigger antenna with more directivity should help, but the thing is dvb-t is quite tollerant of multipath, unlike atsc.

Where are you located? Are any of the other repeaters viable sources?




Richard rich.ms



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  # 125067 20-Apr-2008 13:51
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I am already using a 91 element high gain antenna, I am in Glendowie and am currently pointing at waiatarua with horizontal polarization.

 
 
 
 


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  # 125072 20-Apr-2008 14:02
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Think you would get pine hill at all? Thats horizontal as well so less antenna disassembaly to flip it like for skytower or remmers.




Richard rich.ms



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  # 125075 20-Apr-2008 14:13
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Looking at the map shows its definetly no further away than Waiatarua in terms of distance so probably worth a try could be more difficult to line up though, all the other ones around are pointed that towards waiatarua.

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  # 125078 20-Apr-2008 14:21
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Have you tried without the amp?

Here, I can take my UHF antenna, split it 8 ways, go thru 15 meters to the garage, another splitter and get great quality, even tho the analogs are at the point where they are totally unwatchable. When my dist amp is there even without modulated sources being mixed in, it trashes the quality of the digital signals even tho the analogs come up to almost perfect at the end of the garage run.




Richard rich.ms



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  # 125084 20-Apr-2008 15:08
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I have tried with the masthead amp, without it, with an amplified splitter, without it, different cable, This is the best quality analogue i have had the whole time and probably the most consistant digital too (breaks up less often than it did without the amp - once every 30 seconds or so now)

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  # 125090 20-Apr-2008 15:47
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Pine Hill is only 25 dBW or 300W. Waiatarua is 52 dBW or 150 kW - 500 times the power of Pine Hill.




Ross

 

Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+

 


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  # 125092 20-Apr-2008 16:00
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Yea i just tried pointing it in that direction and it was much worse, Best picture i can get it seems is pointing at Waiatarua but this has quite a bad ghost. Are sky tower and remuera going to be worse ? I imagine they are only going to be transmittiing very weakly.

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  # 125139 20-Apr-2008 19:01
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Skytower is only 25 dBW or 300W, Remuera only 9 dBW or 8W.




Ross

 

Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+

 


Speed Test


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