Forum › Forums › Freeview HD › HDR 1800T, 2000T › HDR-2000t COM7 MUX problem
- This topic has 296 replies, 29 voices, and was last updated 6 years, 1 month ago by
Martin Liddle.
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April 19, 2015 at 6:50 pm #61017
Anonymous
InactiveHi chaps
After many rescans and moving aerial feed away from HDMI cable I am still no nearer to solving this problem.have also disconnected power and rebooted but still the same I am running out of ideas.any suggestions would be welcomed.
April 19, 2015 at 7:04 pm #61018Anonymous
InactiveI have just tried a manual retune for ch 32 but without the aerial lead from the Humax to the TV plugged in, still no signal detected.
Interesting that my TV is HD but the TV’s built in Freeview tuner isn’t HD.
Simon
April 19, 2015 at 7:19 pm #61019Anonymous
InactiveI have asked about this on http://www.digitaluk.co.uk/help_and_advice
April 19, 2015 at 8:41 pm #61020grahamlthompson
ParticipantScott McC – 3 hours ago »
Cookie – 20 hours ago »
Hi new to the forum recently purchased HDR1800t ,my local transmitter is Hannington and I am having the same problem with channel 32’not too sure when it started, I have rescanned with no success at all 0% quality and 0% signal strength. Could this be a transmitter problem?
Hi
See my reply to Sumprat on this topic. It started for me last Tuesday. I tried 4 rescans on same day eventually pulling channel 32 back in. Following evening (Wednesday) it was gone and has been ever since. Were it not for my TV picking up Channel 32 (from same aerial) I’d be thinking it’s Hannington but that can’t be the case (unless the HUMAX is not sensitive enough to pick it up-which seems unlikely).
This may seem a daft response. Can you try some form of signal attenuator on the aerial input to the the Humax box (especially if you have some sort of amplification between the aerial and the Humax box aerial input. This could be a properly designed UHF attenuator or a simple splitter (feed the TV from the other output of the splitter). Too high a signal can be as bad as too little. From your posts it seems very unlikely, but UHF is can have some very weird effects (including aerial and amplifier response at a specific frequency). Other than this all the possible courses seem to have been exhausted, so worth a punt
.It’s not unknown for the transmission power of a specific MUX to be increased to check if it interferes with adjacent transmitters.
April 19, 2015 at 9:34 pm #61021Anonymous
InactiveHi All
Forgot to mention on Saturday I tried a Factory Reset. Again still no Channel 32. Think I’ll try giving Humax a call tomorrow just in case they have any suggestions. I’ll also explore Graham’s suggestion of an attenuator.
April 20, 2015 at 10:52 am #61022Anonymous
InactiveHi I have just fitted a splitter as suggested and then carried out a rescan still have the same problem,I have not got an amplifier in the system and no blue ray recorders or anything else attached,baffled!
April 20, 2015 at 3:55 pm #61023Anonymous
InactiveHi All
I spoke to Humax on 0344 318 8800 and discussed the problem.
It was recommned I manually scan the following channels:
SD: 41, 42, 44, 45, 47
HD: 39, 32
These are all Hannington centric channels. I explained that I had already done so and that all was well until I got to channel 32 which the Humax “sees” as having o% signal and quality.
After a lengthy pause, the Humax rep then recommended I perform another manual scan but this time using the following:
SD: 24, 27, 41, 44, 47
HD: 21
I will try this evening but I don’t hold out much hope. I tried a manual scan last Friday on every channel (using DVB-T2) between ~ 20 and 60 and only found a signal on Channel 39 which as you all know covers around a half of the available HD Freeview broadcasts.
As to why the TV can pick up the COM7 MUX but the Humax currently cannot, the rep referred to the Humax requiring a different “depth of tuning”. I haven’t invetigated whether that phrase means a great deal but perhaps soemone else can shed some light?
April 20, 2015 at 4:06 pm #61024Anonymous
InactiveIt does occur to me that the Humax may amplify the output from RF out slightly. Does the TV, with a direct RF connection still have no problem?
April 20, 2015 at 4:08 pm #61025Anonymous
InactiveDid you explain that here appears to be three of us with the problem? I just did a manual scan on 32 and just prior to the scan it said it had signal at 84% and quality at 100% but still found no channels. Another scan saw no signal.
April 20, 2015 at 5:23 pm #61026grahamlthompson
ParticipantCookie – 6 hours ago »
Hi I have just fitted a splitter as suggested and then carried out a rescan still have the same problem,I have not got an amplifier in the system and no blue ray recorders or anything else attached,baffled!
Baffling indeed. Did you try feeding the TV with the other output of the splitter and confirm COM 7 is still available. That would reduce the signal strength by a little more than 50% (about 4dB).
If so and based on other reports it would seem that there is something in the COM 7 data stream the Humax doesn’t like. Perhaps a change in the broadcast parameters.
April 20, 2015 at 5:33 pm #61027Anonymous
InactiveSumpRat – 1 hour ago »
Did you explain that here appears to be three of us with the problem? I just did a manual scan on 32 and just prior to the scan it said it had signal at 84% and quality at 100% but still found no channels. Another scan saw no signal.
Hi Simon
Yes I informed Humax there were several of us experiencing same. I would have thought that if you had signal at 84% you would be able to receive channels (even if just temporarily). Even more baffling.
April 20, 2015 at 5:40 pm #61028Anonymous
InactiveHi All
Not sure if this is useful, but I can say that this problem started at some point on Tuesday 14 April. I was able to restore channel 32 around 00:30 on Wednesday 15th but it was gone when I checked at ~22:00 and it’s been that way ever since. My set-up has not changed in the period prior to or after this problem first appeared.
As suggested by Graham Thompson, I’m coming to the view that there has been some recent change to the Channel 32 signal in the Hannington area that the Humax does not like.
April 21, 2015 at 8:13 am #61029Anonymous
InactiveAs there are BBC channels involved, is it worth getting in touch with the BBC to see if they can resolve this?
Try http://www.bbc.co.uk/reception/television and follow the Transmitter Checker – eventually you can report a problem. Probably better to go to “About us” page and contact them by ‘phone.
April 21, 2015 at 8:46 am #61030Anonymous
InactiveFinally!! I thought I was going mad! I am having the same problem.
I am living in the RG17 postal area and my box points to the Hannington transmitter. I have a DTR – 2000T box and the same night that “Spike TV” went live I lost all my com 7 channels. I don’t have the option to manually scan with my box so having tried doing it automatically I have had no luck.
April 21, 2015 at 9:51 am #61031Anonymous
InactiveFor what it’s worth, aerialsandtv’s Hannington page has some advice about faultfinding when MUXes disappear. No idea whether any of this applies in the current case.
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