All posts by Furnace
Below are all of Furnace's postings, with the most recent are at the bottom of the page.
I recently bought a HD STB and cannot seem to get the HD MUX by autotuning. The signal strength for the MUXs on 41,42,44,49 and 52 are around 35%, and the "Quality" (whatever that is) shows 95%.
When looking manually at BBCB MUX on 47, it initially showed no signal, but after a few minutes started to show about 50% signal strength, but zero Quality. (It also showed the following:
Tuner DBB-T2 BER:3.0E-3 C/N (dB): 24.2
682Mhz; 32k; 1/128:SISO,0)
However if I ask the box to tune to this channel, it can find no channels.
To my amateur eye this looks like it can "see" C47 in HD.
Do you experts think this is a weak signal/aerial issue? I am currently using a wideband YAGI, SLX8 splitter booster that is installed maybe 15metres from the masthead. All cable is screened satellite stuff using F plugs. Would I benefit from a Group B aerial and a masthead amplifier?
Wimbledon starts tomorrow, and still no HD :(
I am at TN8 6PE, pointed at Tunbridge Wells (106 degree bearing) and very rarely have reception problems on the old SD STBs.
ALl suggestions gratefully accepted
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@jb38
Thanks for your thougts. I had read about the "overboosted signal" causing problems. My booster/splitter is a SLX8 and has a "full" output socket that passes through an unadulterated signal. Sadly this made no difference. As mentioned, the signal level on the MUXs to which I can successfully tune range from 20%-50%. I don't trust the readings to be precise, but would have though that would give a fair undication? In general the area I live in is known as being poor for DTT reception :(
I'm going to try a masthead amp today, and do some aerial wiggling. It currently points at 106 degrees which is slap bang at a huge oak tree 15 metres away.
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Bizarre. As of yesterday I can now receive C47 carrying HD from T Wells transmitter, despite receiving no signal on this channel for the previous few days (see post a few lines up). Is it possible that the T Wells switchover (due to have completed on Jun 12) did not fully occur until Jun 27th?
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F
Crystal Palace (Greater London, England) Full Freeview transmitSunday 8 July 2012 10:59AM
Edenbridge
I always seem able to receive the SD MUXs, but the HD MUX is flakey. As of yesterday (July 7th) it has disappeared (No Signal), whereas the SD MUXs retain about 50% Strength and 95% Quality.
When the HD MUX is working (as it was for the previous week) I get about 75% Strength and 95% Quality.
I am pointing at T Wells receiver from TN8 6PE and using a Technika HD STB. Aerial points directly at a large Oak tree. Could this be the problem, despite the SD MUXs being unaffected?
Wimbledon final this afternoon and currently no HD :(
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I always seem able to receive the SD MUXs, but the HD MUX is flakey. As of July 7th it disappeared (No Signal), whereas the SD MUXs always show about 50% Strength and 95% Quality.
Today (July 9th) the HD MUX is back working and it shows about 75% Strength and 95% Quality.
I am pointing at T Wells receiver from TN8 6PE and using a Technika HD STB. Aerial points directly at a large Oak tree. Could this be the problem, despite the SD MUXs being unaffected?
No Wimbledon final in HD :(
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@jb38
Thanks for that. I am using a SLX 8 way booster/splitter and very rarely have any problems on SD. Interestingly, the SD MUX Signal Strength seems to always be around 52%, despite the HD MUX showing 75% (when it works) and Zero (when it doesn't). Could it be that despite the 75% strength on HD, the Quality (which I understand is to do with the box's capacity to correct errors in the data stream) is more susceptible to corruption than the SD streams?
I am thinking of putting a Group B aerial in rather than the current wideband.
Incidentally, yesterday we had torrential rain and the leaves were certainly wet (tree is 15m away) and the HD signal was fine!
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@jb38
Not quites ure where you are coming from regarding the "FULL" idea. According to the SLX8 manual, the "FULL" outlet provides an unboosted signal, identical to that which comes down the aerial down lead.
"The SLX8 is equipped with a "FULL" output socket which carries a signal of the same strength as your aerial downlead. ..."
Does that make sense to you?
Regards
Mark
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Saturday 23 June 2012 4:16PM
Edenbridge
I am near Tunbridge Wells and cannot receive the HD channels. They should be on UHF channel 47, but my STB shows nothing on that channel. All the other MUXs (41,42,44,49 and 52) are fine, showing about 50% signal strength. Anybody else using the TWells transmitter got this issue?