All posts by Chris.SE
Below are all of Chris.SE's postings, with the most recent are at the bottom of the page.
Brian Russell:
According to DigitalUK it is only the Local Muxes changing channel on the 23rd October. One is supposedly going to UHF21 another to UHF24, the third will be on UHF40. As has already been said, even some of DigitalUK's own documentation is confusing, but the Coverage Checker is believed to give the correct data.
If you put your postcode into the Coverage Checker About us | Freeview it will show you the predicted reception of available multiplexes at your location, also the channel and reception changes on the various dates. Don't forget any Local Multiplexes you might get will be towards the bottom of the page.
| link to this comment |
David Railton:
As has been said on the Winter Hill pages, several of us miss the Local Multiplex detail on occasion as it is down towards the bottom of the lists on DigitalUK. Did you scroll down the list to see them - if there's predicted reception at your location (that doesn't mean that you might/might not get them in any event!).
As I've just posted on the Winter Hill page, one local mux will be on UHF21, another on UHF24 and the third on UHF40. If you currently don't get any of them then I wouldn't do a full retune on the 23rd. I'd try a manual tune on each of those UHF channels and see if you get anything.
| link to this comment |
John Lewis:
If you actually mean LCN48 - Sony Channel, this and several other of Sony's channels are now only broadcast on Local Multiplexes. These changes were made by Sony a while ago. See Channel listings | Freeview for which channels (LCNs) are on which multiplexes.
There are no Local Multiplexes broadcast from Stockland Hill if that's your main transmitter.
| link to this comment |
Stephen B:
If you had an aerial installed 2yrs ago it should have been a Group T or Wideband rather than the original C/D group for Whitehawk Hill. However if you are in a possible "marginal" location the recent changes and changes elsewhere can affect the potential reception. If you provide your full postcode we can offer constructive comment on your predicted reception.
As mentioned in the post before yours a group K aerial is all that is needed now for Whitehawk Hill it would have slightly better sensitivity than a Wideband, but that wouldn't be necessary if predicted reception at your location is good. There maybe other reasons you are having problems such as incorrectly tuned to weak signals from another transmitter. See the post before yours to check for the correct channels.
| link to this comment |
James:
AFAIK there's been no engineering work and none has been listed for the last couple of weeks. The six main muxes are all supposed to be transmitting at full power of 100kW. I'm not seeing any issues with UHF 35 & 36.
COMs 7&8 on UHF 55&56 transmit on less power than the others, but again all seems normal.
If you provide a full postcode, we can see what predicted reception at you location should be according to the DigitalUK checker.
| link to this comment |
Charles:
Anything that is in the "line-of-sight" to the transmitter could affect the signal. If you have trees in the way, they can indeed affect the signal, especially when wet.
| link to this comment |
John:
You have BBCB on 530MHz which is UHF28 because you are picking it up from Darvel and it's lower power than Black Hill as well as further away, this will not be helping.
What wasn't clear is how long you've had the problem, if it's just since a retune in/since September when only the Local mux moved, then you've been unlucky.
It's also possible your aerial is not pointing in quite the direction it should be, although the beam-width may be sufficient to allow sufficient reception from Darvel. Can you not at least check the angle your aerial is pointing?
It should be 16deg. S of E (106deg) for Black Hill. Darvel is 178deg. almost due S.
I suggest that you unplug the aerial and do an automatic tune - this should clear all previous tuning as no signals are being received. Then plug the aerial back in and do a manual tune for each of the UHF channels from Black Hill. You should see channels from the coverage checker, but for clarity they are - Ch.no:(MHz) -
46 (674), 43 (650), 40 (626), 41+ (634.167), 44 (658), 47 (682), 55 (746), 56 (754), 30 (546) in the order
PSB1/BBCA, PSB2/D3&4, PSB3/BBCB, COM4/SDN, COM5/ArqA, COM6/ArqB, COM7, COM8, Local.
If you want to convert UHF channel number to MHz at any time see Help | Freeview
| link to this comment |
GeordieLad:
There are two places to refer.
One is Channel listings | Freeview which lists which channel is on which mux in the relevant region - there are minor variations for Wales, NI, Scotland shown on the list.
The other is the DigitalUK Coverage checker About us | Freeview where you can put your postcode in (& house number if you wish for the most "accurate" prediction) to give the predicted coverage from the various transmitters and their muxes at that location.
If you just want to look at which RF channels are used at a particular transmitter, one of the easiest ways is to go to that transmitter page on this site, (eg. Sandy Heath - that should be a link - it is in your post) and towards the top of the page you'll see the postcode of the site which is a link to the DigitalUK checker at the site.
For Sandy Heath the postcode is SG19 2NH, so you can see a list of the multiplexes. Any Local ones are usually towards the bottom of the page. Don't be confused by the listing of other transmitters, they are those that can be received at the site. You may find some of the "predicted" figures at the site aren't what you'd expect !!!
| link to this comment |
John:
That minor difference is unlikely to make much difference. But once you are tuned to the correct transmitter, as I'd said previously, it may be a case of experimenting and if you can't get to your aerial easily, it's difficult to say what might be best.
From your location, what direction is the runway in and where they touch down?
Do any of your neighbours get a similar problem?
| link to this comment |
Friday 18 October 2019 6:38AM
And after the COMs 7&8 close, Sheffield only needs a group K aerial (but Group T /Wideband would do) rods vertical for Sheffield direction 55deg., rather than horizontal for Belmont direction 91deg.