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I just did my re-tune and seem to have very poor signal on the BBC terrestrial channels (1,2,3,4 etc).
All other channels look OK with good strong signals.
It is tuned to the correct transmitter (Sandy Heath) and all channels before the re-tune were very good.
Does anyone have any ideas?
Have you checked whether you are just tuned to Sandy Heath and are not looking at a weaker BBC transmission?
To check, press the menu button on the remote and then select Settings >> System >> Signal_Detection followed by the right button on the silver circle. This will produce a list of the UHF frequencies you are tuned into. If you are just tuned to Sandy Heath it will list only 21, 24, 27, 48, 51 and 52.
If the frequencies your HDR lists are not all from Sandy Heath then that is almost certainly the issue and you will need to do a manual retune.
If you are not tuned to all and only all the Sandy Heath numbers then to correct you will need to do a manual retune as described by Martin Liddle’s post http://myhumax.org/forum/topic/transmitters#post-2336.
If you are tuned OK then tune to one of the BBC channels and check your signal strength.
MENU >> Settings >> System >> Signal_Detection.
What does it read? The strength bar should not be near 0% and a strength of 100% can indicate that the signal is overloading the HDR’s tuner.
Any channels above 799 e.g. 800 or above usually indicates that the Humax is receiving from more than one transmitter (unless you are part way through a DSO phase)
ezra pound – 9 hours ago »
Any channels above 799 e.g. 800 or above usually indicates that the Humax is receiving from more than one transmitter (unless you are part way through a DS O phase)
Like an over the counter pregnancy test the 800 test is not 100% accurate.
Isn’t looking at the list of tuned in UHF numbers more conclusive and easier?
For Sandy Heath press the menu button on the remote and then select Settings >> System >> Signal_Detection followed by the right button on the silver circle. This will produce a list of the UHF frequencies you are tuned into. If you are just tuned to Sandy Heath it will list only 21, 24, 27, 48, 51 and 52.
I am having the same problem as the original poster.
Live in central Scotland and have retuned repeatedly.
Signal strength up at 100% on all channels.
Quality at 100% on all channels except BBC – where it is hopeless.
This has just happened out of the blue after years without any worries.
I’m stumped…
moffac – 2 hours ago »
I am having the same problem as the original poster.
Live in central Scotland and have retuned repeatedly.
Signal strength up at 100% on all channels.
Your problem is almost certainly that your signal strength is too high and is saturating the tuners. If you have an amplifier in the system then try removing it. If there is no amplifier then you need to fit an attenuator which will only cost a few pounds. Any signal strength above 40% will work fine and our box has in the past worked without problem at signal strengths just below 30%.
Many thanks. Attenuator ordered. Fingers crossed…
Well, the attenuator didn’t work.
Retuning with automatic search isn’t even picking up the BBC channels now!
If I plug aerial into TV, everything is fine.
I’ve tried meddling with manual search to no avail…
Retune now picking up beeb channels but they are now in 800s, with “channel scrambled or not available”.
Signal detection “unknown” whereas the rest say Central Scotland.
Had the box about three years now and never had any problems other than a rather annoying tendency for the thing to freeze on Wednesdays!
Signal strength on channels I can and can’t watch is between 70 & 75%
Quality on Channel 4, 5 & E4 etc (Ch43) is at 100%
Quality on beeb channels fluctuating between 0% & 50% although there is no picture just “no or bad signal” now.
70% signal strength is ideal. Silly question but have you had a careful look at the aerial cabling? It has been known for water to get into the cabling and cause this sort of selective loss of multiplexes.
Well, I live in Glasgow and there is certainly no shortage of rain.
Not sure I fancy clambering onto the roof to find out since I’m on the top floor of a tenement block!
Could water damage really be that selective? All is fine when aerial goes directly into TV.
moffac – 2 hours ago »
Not sure I fancy clambering onto the roof to find out since I’m on the top floor of a tenement block!
If the aerial lead goes into a wallbox try starting at that end behind the set.
Could water damage really be that selective? All is fine when aerial goes directly into TV.
I agree it is not intuitive but something is hampering the Humax and there have been reports in the past about poorly made joints and water ingress both selectively affecting some multiplexes. I can only suggest a process of elimination. Perhaps you could take the Humax to a neighbours house and see if it works properly there. If it does you know the problem is local to your installation.
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