Forum › Forums › Freeview HD › HDR 1800T, 2000T › HDR-2000t COM7 MUX problem
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Martin Liddle.
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May 14, 2015 at 5:27 pm #61077
Anonymous
InactiveHas anyone with this problem tried taking the box to a different transmitter area to see what happens?
May 14, 2015 at 5:45 pm #61078Anonymous
InactiveJamesB – 11 minutes ago »
Has anyone with this problem tried taking the box to a different transmitter area to see what happens?
I would hope that, as Hannington is the only transmitter where I’ve seen this problem mentioned, the answer should be that it works. Unless there has been a strange supply of rogue Humaxes just to the area. Does anyone in the area with a 2000T not have the problem with COM7?
May 14, 2015 at 5:58 pm #61079Anonymous
InactiveEEPhil – 5 minutes ago »
JamesB – 11 minutes ago »
Has anyone with this problem tried taking the box to a different transmitter area to see what happens?
I would hope that, as Hannington is the only transmitter where I’ve seen this problem mentioned, the answer should be that it works.
Be interesting to know if it does though.
Quote:Unless there has been a strange supply of rogue Humaxes just to the area. Does anyone in the area with a 2000T not have the problem with COM7?It’s not just the 2000T model. Some of those reporting the problem have YouView boxes.
Things not known:
1. How many Humax users in the area are not experiencing the problem
2. Whether the problem has been experienced in any other area
May 14, 2015 at 6:12 pm #61080Anonymous
InactiveJamesB – 9 minutes ago »
Things not known:
1. How many Humax users in the area are not experiencing the problem
2. Whether the problem has been experienced in any other area
Correction. One report for Crystal Palace.
Another thing not known: whether any non-Humax boxes are experiencing the problem.
May 16, 2015 at 11:33 am #61081Anonymous
InactiveTo answer at least one of your questions, I live in RG4 and have a PC fitted with a BGT3620 DVB-T2 receiver card from BlackGold. I am experiencing exactly the same problems – complete loss of the Hannington com7 multiplex a few weeks back. Like other users, I can receive com8 without problems.
May 16, 2015 at 11:59 am #61082Anonymous
Inactivestwarr – 10 minutes ago »
To answer at least one of your questions, I live in RG4 and have a PC fitted with a BGT3620 DVB-T2 receiver card from BlackGold. I am experiencing exactly the same problems – complete loss of the Hannington com7 multiplex a few weeks back. Like other users, I can receive com8 without problems.
Thanks.
So the problem seems to be not exclusive to Humax, and not exclusive to the Hannington area.
To me that suggests it may just be down to some tuners just failing to pick up the COM7 mux. Be it due to the lower power, or the tuner picking up a Freeview Lite relay. In other words, not a transmitter fault but a fault, or characteristic, of the tuner.
May 16, 2015 at 3:25 pm #61083Anonymous
InactiveI’m pretty sure this isn’t a ‘low power’ problem – I was able to receive all the HD channels on Hannington com7 without problems until very recently. Additionally, com7 is listed as 36700 Watts; whereas the adjacent com8 is only 5500 Watts, but decodes without any problems. Does anyone know whether the com7 multiplex was reconfigured recently?
My PCIe based receiver is generally pretty sensitive – I can see signals from at least 3 different transmitters for a number of SD channels, and a year ago I could even pick up a couple of channels from Europe during good weather.
Assuming that there isn’t some quirk in the com7 multiplex that is creating issues for some decoders (trying to confirm whether the affected devices share the same DVB-T chipset), my best guess would be that there is some new source of radio interference on C32 – a few folk have mentioned that adding an attenuator might help.
May 16, 2015 at 3:50 pm #61084Anonymous
InactiveQuote:I’m pretty sure this isn’t a ‘low power’ problem – I was able to receive all the HD channels on Hannington com7 without problems until very recently. Additionally, com7 is listed as 36700 Watts; whereas the adjacent com8 is only 5500 Watts, but decodes without any problems.According to http://www.a516digital.com/p/com7-and-com8.html com8 is 26.9kW.
Quote:Does anyone know whether the com7 multiplex was reconfigured recently?According to an earlier post in this thread, DigitalUK have been asked if there have been any changes and have said no.
An attenuator might well help.
May 16, 2015 at 3:55 pm #61085grahamlthompson
ParticipantHas anyone checked the nearest transmitter to Hannington using channel 32 and it’s compass direction ? Interesting to know the transmitter bearing for those with problems (is the nearest channel 23 transmitter behind the aerial reflector or in front).
Really needs someone with a spectrum analyser to have a look locally.
May 16, 2015 at 4:05 pm #61086Anonymous
InactiveRidge Hill?
May 16, 2015 at 4:19 pm #61087Anonymous
Inactivestwarr – 15 minutes ago » com7 is listed as 36700 Watts; whereas the adjacent com8 is only 5500 Watts
Listed where?
5500 Watts was the nominal figure in the original proposal, it was updated to a nominal figure of 10000 later in 2013.
Hover over the ’34’ under COM8 for Hannington at http://www.digitaluk.co.uk/coveragechecker/main/trade/rg26+5ud/NA/
This will give you a more reliable current figure of 26190 Watts not the very old figure of 5500.
Hannington’s COM7 nominal figure was 10000 Watts and that is also not what is being used.
May 16, 2015 at 4:45 pm #61088grahamlthompson
ParticipantJamesB – 39 minutes ago »
Ridge Hill?
73mls due NW of Hannington. Seems unlikely.
Does anyone affected have an aerial pointing roughly NW.
May 16, 2015 at 5:06 pm #61089Anonymous
InactiveIt is a long way. It seems to be the nearest using 32 unless I’m overlooking something.
May 16, 2015 at 5:40 pm #61090grahamlthompson
ParticipantJamesB – 33 minutes ago »
It is a long way. It seems to be the nearest using 32 unless I’m overlooking something.
Unfortunately the current DTG database is out of date (typical 😯 )
http://stakeholders.ofcom.org.uk/broadcasting/guidance/tech-guidance/transmitter-frequency/
Edit just noticed COM 7 is a separate database
EDIT Transmitters using channel 32 for COM 7
Black Hill
Bluebell Hill
Caldbeck
Durris
Emley Moor
Hannington
Moel y Parc
Ridge Hill
Sandy Heath
Sutton Coldfield
Beacon Hill
How good is your Geography ?

Sandy Heath perhaps. (69 mls NE). It will take while to check the others.

Bluebell Hill 76m due E.
So unless one of these tried a increase in power (rather than a change at Hannington) seems a dead duck.
May 16, 2015 at 6:24 pm #61091grahamlthompson
ParticipantJust for completeness.
Angus 31 H
Bilsdale 31 H
Caradon Hill 31 H
Darvel 31 H
Oxford 31 H
Pontop Pike 31 V
Rowridge 31 H
Sheffield 31 V
Tacolneston 31 H
Waltham 31 H
Wenvoe 31 H
Winter Hill 31 H
Black Hill 32 H
Bluebell Hill 32 H
Caldbeck 32 H
Durris 32 H
Emley Moor 32 H
Hannington 32 H
Moel y Parc 32 H
Ridge Hill 32 H
Sandy Heath 32 H
Sutton Coldfield 32 V
Beacon Hill 33 H
Belmont 33 H
Craigkelly 33 H
Crystal Palace 33 H
Divis 33 H
Mendip 33 H
Pontop Pike 33 H
Sutton Coldfield 33 H
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