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Jim104 – 5 mins ago »
So Mars
What do you see what the problem is then, I getting totally confused here ….
10 mls from a transmitter but which one ? A main power transmitter is way different from a low power relay from the same transmitter.
Martin is trying to check which transmitter you are likely to be using.
Does your own aerial have the elements vertical or horizontal or are you on a communal aerial system that supplies others in say a block of flats ? That’s a whole new ball game.
Hi Martin
Postcode is NR16
James
Hi Graham
Transmitter that the aerial is pointing at is Tacolneston approx 10 miles away, elements are horizontal.
Jim104 – 11 mins ago »
Hi Graham
Transmitter that the aerial is pointing at is Tacolneston approx 10 miles away, elements are horizontal.
That is a main power transmitter. Is the aerial outdoors ? If so it’s a definite possibility that you have two strong a signal especially in terrain as flat as Norfolk you should have clear line of sight to the transmitter,
eg The PSB3 – HD mux erp is 100kW .
Jim104 – 16 hours ago »
Hi Graham
There are no amplifiers to the aerial. One channel in particular gives dropout problems its Channel 26. If I tune to it and then go to the settings /channel and broadcast / signal test` its show the signal test screen for tuner 1 but channel 39 ???
The average readings are strength 54 % quality 67 %.
How do I check the actual channel 26 strength.
If I do a manual channel search for chn26 I get a freq of 514000 – DVB-T – 8 MHz with strength of 7% and 0 quality.
Dont understand whats happening here,
James
You need to understand that there are two sets of “channel” numbers.
The 26 to which you refer, is specific to Yesterday and is better called its LCN. The LCN is the number you use on your remote to change, for example, from BBC1 to Channel 4 on a routine basis.
The 39 which you came across is the UHF channel number for the group (or Mux) which contains Yesterday (specifically Mux COM6). Each Mux contains quite a number of LCNs.
The correct UHF channel numbers for Tacolneston are:
Mux PSB1 – 40
Mux PSB2 – 43
Mux PSB3 HD – 46
Mux COM4 – 42
Mux COM5 – 45
Mux COM6 – 39
Mux COM7 HD – 55
These are the numbers you would need if you had to do a manual tune.
COM 7 is the temporary mux and transmitted on a lower power than the main ones. Additionally they are being converted to national single frequency network so every transmitter will use the same UHF carrier. If you live within reach of two transmitters using the same carrier it can be very difficult to get a stable signal.
Com 6 is 100Kw so is likely to be too high a signal
Com 7 is only 27.4kW.
If you get a stable signal on lcn 107 BBC News-HD which is on this mux. you have your answer.
With 107 tuned. What does the Aura signal test option say about the reception ?
grahamlthompson – 2 hours ago »
That is a main power transmitter. Is the aerial outdoors ? If so it’s a definite possibility that you have two strong a signal especially in terrain as flat as Norfolk you should have clear line of sight to the transmitter,
eg The PSB3 – HD mux erp is 100kW .
Graham is it possible on the Aura to see which Multiplex channels are currently tuned in? if we can get that information then we can eliminate mistuning.
Martin Liddle – 5 mins ago »
grahamlthompson – 2 hours ago »
That is a main power transmitter. Is the aerial outdoors ? If so it’s a definite possibility that you have two strong a signal especially in terrain as flat as Norfolk you should have clear line of sight to the transmitter,
eg The PSB3 – HD mux erp is 100kW .
Graham is it possible on the Aura to see which Multiplex channels are currently tuned in? if we can get that information then we can eliminate mistuning.
Yes it is Signal test gives the current mux info over the strength and quality which is why I asked for the details.
Currently only tuner 1 is displayed even if you force all the tuners to be used.
Mine is tuned to PSB-3 It says CH30, 54600 kHz, 8 MHz (spacing), AUTO and mine is recording so it says Live, recording below the Quality bar graph
Jim104 – 17 hours ago »
The average readings are strength 54 % quality 67 %.
This seems very odd with a 100KW transmitter 10 miles away in Norfolk! I would be checking for loose connections and/or interference (assuming that you have the correct type of aerial pointing in the correct direction). Do you have a splitter (is the aerial feeding several TVs)?
Mars – 41 mins ago »
Jim104 – 17 hours ago »
The average readings are strength 54 % quality 67 %.
This seems very odd with a 100KW transmitter 10 miles away in Norfolk! I would be checking for loose connections and/or interference (assuming that you have the correct type of aerial pointing in the correct direction). Do you have a splitter (is the aerial feeding several TVs)?
Op might have a group A especially if the transmitter was originally group A. Group A aerials stop around UHF 37.
A small wideband like the DM log should be ideal.
OP what colour is the plastic end plug on the end of the aerial ?
Thank you all for the useful information in your replies.
Graham – the aerial is in the loft and is in line of sight of the transmitter.
I tuned to Lcn 107 and the test signal returned 30% strength and 100 % quality. Chn 55 746000 kHz DVB-T2 8 MHz auto.
I cannot see the colour of the end plug as its attached to a splitter box high up under the eaves.
Mars – The aerial was already installed at the house when I moved in 6 years ago. The main aerial feed goes through a splitter box (non powered) and feeds two other aerial points of which one is connected to a tv which receives signals and pictures satisfactorily. I previously had a humax box the one with two tuners, I never experienced picture breakup on that one and was looking (then) at the same channels as I am now, thats why this is baffling me.
James
Jim104 – 40 mins ago »
Thank you all for the useful information in your replies.
Graham – the aerial is in the loft and is in line of sight of the transmitter.
I tuned to Lcn 107 and the test signal returned 30% strength and 100 % quality. Chn 55 746000 kHz DVB-T2 8 MHz auto.
I cannot see the colour of the end plug as its attached to a splitter box high up under the eaves.
Mars – The aerial was already installed at the house when I moved in 6 years ago. The main aerial feed goes through a splitter box (non powered) and feeds two other aerial points of which one is connected to a tv which receives signals and pictures satisfactorily. I previously had a humax box the one with two tuners, I never experienced picture breakup on that one and was looking (then) at the same channels as I am now, thats why this is baffling me.
James
Passive Splitters reduce the signal level.
Check external coax cables carefully for damage to the outer cover. If they are not properly secured over edges wind movement can abrade the outer covering and let in water. This is particulary bad where the coax uses air spaced dialectric rather than solid foam.
Water greatly increases the cable losses. If you can replace external cables with double screened satellite grade Webro WF100 terminated using f connectors and water proof using silicon grease.
You can get f to Belling Lee adaptors where you need them
The end plug is on the aerial which you can presumably get to in the loft. They are pushed in to the open end of the boom. Group A aerials generally have a black plug. If I remember correctly wideband aerials use blue plugs.
See the gain of different aerials. The UHF carrier frequency is at the bottom of the graph
The DM log I recommended is the black dotted line.
Hi friends, am further confused now, please bear with me while I explain.
My TV aerial enters the room from the loft it is routed firstly into the Aura box and then with the in out plugs to the TV.
If I watch a public service channel BBC ITV etc I get good solid signals through the Aura box without any picture breakup.
If I watch one of the Mux channels for instance Freeview Chen 20 (Drama) on the TV but through the Aura box I get pixelation and breakup of picture. This is consistent through the Mux channels.
If I watch the same channel or other mux channels on the TV( LG OLED 55 ) the picture is stable without any breakup or problems.
The Aura and the TV return the same signal and quality figures.
It matters not whether the Aura box is on or off.
I am coming to the conclusion that the Aura box has a defect.
Any thoughts people ???
Cheers James
Jim104 – 10 hours ago »
Hi friends, am further confused now, please bear with me while I explain.
My TV aerial enters the room from the loft it is routed firstly into the Aura box and then with the in out plugs to the TV.
If I watch a public service channel BBC ITV etc I get good solid signals through the Aura box without any picture breakup.
If I watch one of the Mux channels for instance Freeview Chen 20 (Drama) on the TV but through the Aura box I get pixelation and breakup of picture. This is consistent through the Mux channels.
If I watch the same channel or other mux channels on the TV( LG OLED 55 ) the picture is stable without any breakup or problems.
The Aura and the TV return the same signal and quality figures.
It matters not whether the Aura box is on or off.
I am coming to the conclusion that the Aura box has a defect.
Any thoughts people ???
Cheers James
Have you tried a different cable between the Aura and the TV?
Jim104 – 12 hours ago »
This is consistent through the Mux channels.
I am not familiar with the term “Mux channels”; please could you clarify which of the multiplexes you are describing?
The Aura and the TV return the same signal and quality figures.
Please could you tell us the signal strength and quality figures for each of the multiplexes?
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