All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
Vectra: An alternative approach (it's a long while since I used WinTV), can you select BBC One and change the frequency to 698MHz (UHF channel 49)? And likewise for BBC Two, BBC Three etc? Does this work?
| link to this comment |
David Waterhouse: While you may be only 8 miles from Emley Moor, you do not have line-of-sight.
The large aerials on tall poles probably tells its own story; you aren't in a good area. Some houses are using the Cop Hill Public Service relay transmitter.
Google Streetview, Google satellite and Bing satellite images show Black Rock Mills with one or perhaps two buildings, which are possibly derelict. Bing Bird's Eye shows some more buildings.
I note various planning permission requests over the last few years for this site. Might this development be the cause of your issue?
| link to this comment |
mike shaw: Because objects and the air in the signal path (between you and the transmitter) change and thereby affect the signal.
| link to this comment |
Gareth: See current Transmitter engineering message: "Over the next week Mendip main transmitter: TV (digital) Liable to interruption".
| link to this comment |
David Waterhouse: Saddleworth's COM channels are co-channel (same frequencies), albeit that the former are vertically polarised.
Is it the strength that has gone or the quality that has gone?
Go to the manual tune part of the receiver. Select UHF channel 51 but don't press the button to scan as prior to scanning, receivers often act as a signal meter.
How does this compare to the strength of the four other standard definition channels?:
BBC One(C47); ITV(C44); Pick TV(C52); Film4(C48).
| link to this comment |
Martin Cooper: I suggest that you give at800 a ring:
at800 Brighton 4G test
They may send an engineer to visit you so as to ascertain whether the issue is the 800MHz 4G signal. This may be an opportunity for you to have a professional look at it free of charge to you.
It may be worth noting that BBC services from Whitehawk Hill are on C60- which is the highest frequency channel and is immediately below the 4G signals.
Your box (recorder or whatever) will contain an aerial amplifier this being because the incoming aerial feed is split into two: one for the box itself and one going out to the TV.
If it is the 4G signal, the amplification may just be enough to tip the balance, whereby the 4G signal prevents the TV from resolving the Freeview signal.
You may find that installing a splitter and feeding the TV and box from it might work, this allowing you to turn off the amplifier within the box, sometimes referred to as power save or similar, although not all boxes allow this. This option may be more suited if you wish to solve this yourself.
However, I wonder if you may find that a call to at800 will yield a visit soon, with it presumably having a team of engineers in the area.
| link to this comment |
Martin Cooper: Whilst we can't be sure which sites are currently used for the test 4G 800MHz signals, there are base stations for several of the networks on the top of Enterprise Point.
| link to this comment |
Bert: I wonder if it could be traffic on the M2 and the A249 which both cross the signal path. Or indeed it could be something else in the signal path, such as vegetation.
You don't have line-of-sight to the transmitter:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
Perhaps this is something that is out of your control which is why the various attempted fixes have not worked.
Different frequencies are affected by objects along the signal path in different ways which can result in not all channels being received at the same strength at a single location.
| link to this comment |
Sunday 2 June 2013 7:56PM
Vectra: Does WinTV not allow you to tune by selecting transmitter? In which case it will have the channels/frequencies used for each. In the case of Waltham BBC services have now changed so that tuning process will not work until it has been updated.
For that reason tune to 698MHz (C49) to add BBC services.