All posts by Dre
Below are all of Dre's postings, with the most recent are at the bottom of the page.Hi all, I am still unable to get the Com 7 mux. All other channels I get at 100 Strength and 100 Quality, but the Com 7 mux comes in at 70 Strength and 10-15 quality, so keeps dropping out and is unwatchable. I did notice a few days ago it seemed to be working well and I had BBC News HD at 70 Quality, but its back down at 10-15 again. It seems to me a problem with the Hannington Transmission as I had no problem getting all the channels before the latest 'Change' on April 18th. I now have to watch the standard definition BBC and RT News but as Aljazeera is only HD I can no longer watch it. With me positioned at RG7 3EP I am only 10 miles from Hannington, and am over 200ft above it, so I should not really have any issue whatsoever.
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So after reading the responses on here I went up into my loft to check out what Amplifier I had.
This amplifier is used as a distribution amp as it sends the signal to 3 TV's
It is a Labgear LDL204 4G 4 Way, Freq. range UHF: 470 - 790MHz, Gain per port: 8dB, Noise figure: 3.5dB, with 4G filtering on DTV input.
I think my biggest problem may be my antenna as it looks like a standard Yagi with 18 directors So probably has too much gain for the strength of the signal I should be getting.
Maybe I should go for something like a Labgear LPCT Compact Log Periodic?
Anyone on here proficient in the dark arts of aerial selection?
Also after the recent works on the hannington transmitter I seem to be getting a much better signal on the com 7 mux with 85% signal and 60ish quality, but the quality seems to vary quite wildly.
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Well for me to change the antenna is not a problem, and the labgear compact is only 10. So unless I can get another F-type connector distribution amp for less than 10, or 'some attenuated'(I have no idea what this is) for 3 TVs for less than 10, the antenna would seem the obvious choice.
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Hi, so I have changed the antenna for the Labgear LPCT Compact Log and that didn't reduce the signal enough, so I got an adjustable attenuator and fitted it straight into the back of the Youview Box.
Now as MikeP suggested I have set the attenuator so I have 80% on my strongest Mux which is PSB3
Now I get strength and quality different across the muxes ie.
PSB1 - 65St - 100Q
PSB2 - 75St - 100Q
PSB3 - 80St - 100Q
Com4 - 60St - 100Q
Com5 - 55St - 100Q
Com6 - 40St - 100Q
Com7 - 16St - 3Q
Com8 - 0St - 0Q
My distribution amp has a built in filter that removes any signals from Lte 800 4G
Now when I reduce the amount of attenuation All but Com 7 and 8 will go to 90St and 100Q
Com7 is 55St and 45Quality and Com 8 sits at 35St and 70Quality
This would seem to be the sweet spot.
I still don't understand why Com7 and 8 are so much worse than all the others tho.
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I'm thinking maybe I'll angle my antenna a little more to the south. That may reduce the signal and the interference? I think its probably worth a try anyway.
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Maybe I could angle my antenna a little more to the south. It may have a double positive effect, reducing the signal from Hannington so I need less or no attenuation, plus it may reduce the signal from Crystal palace enough to eliminate the interference. Gotta be worth a try right? I'll have a go tomorrow. Before I go buying another antenna.
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Friday 20 April 2018 1:49PM
Reading
Since the change on 18-4-18 I have been unable to get the Com 7 mux. This morning I unplugged the aerial and did a scan to clear all the channels and then plugged it back in and did another full scan. I now have all the channels back, but the Com 7 Mux channels are a very low quality and so keep dropping out. All the other channels are 100% signal and 100% Quality but the Com 7 channels are 85% Signal and only 10-15% Quality. I have a 5yr old wideband aerial, all new cabling 2yrs ago, Booster about 5meters from the aerial feeding 2 TV's. Aerial is up a 15ft scaffold pole which puts it above the roof line. I am only 10Miles from Hannington which is at a bearing of 231Deg from me (RG7 3EP).