All posts by Chris.SE
Below are all of Chris.SE's postings, with the most recent are at the bottom of the page.
There is some confusion as to where mux ArqA will be later tonight. The OFCOM document Digital Switchover Transmitter Details for the West Region Issue 4
http://stakeholders.ofcom….pdf says it's moving from 56+ to 56.
But DigitalUK Trade View says it's moving to 67 (vacated by ArqB).
Interestingly, DigitalUK TX details page for the West Tranbsmitters shows it as being 56.
We will see later :)
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Part of my previous post disappeared!!
I further added -
"Interestingly DigitalUK's Transmitter Details page for the West shows ArqA as being on 56!
We shall see later which is right :)
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Briantist: Hi Brian, any chance you can update the Mendip UHF Channel numbers at "Digital switchover process details" & "After Wednesday 7th April 2010".
It's somewhat confusing for the uninitiated when looking at the MUX lists above these.
To clarify for anyone who is confused, currently -
Arq A is on C67, Arq B is on 52, SDN is on C48.
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D Gadsden:
I assume you are not getting your signals from Mendip but from one of the relay transmitters that only broadcast PSB multiplexes, otherwise you should be getting ITV, Ch4, Ch5 etc.
There was a re-tune event at Mendip on the 28th as 3 COM multiplexes moved channel, but also affected because of this were 3 Relay transmitters namely Hutton, Portishead & Woodcombe.
Wherever you get your signal, you need to do a re-tune of your receiver to get all the channels back, ideally do a factory reset from the Setup menu.
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Briantist: Thanks for the update Brian :)
Mike Dimmick: Thanks for the updated info, I don't seem to have much time thses days so haven't kept up with late changes :(
Jack Sukerman:
As you say you have 10/10 signal on all the other MUXes, and that you didn't get Film4 etc when Arq B was on C67 prior to Sept.28 then if it's not local interference as has already been suggested it's likely to be your Aerial or Coax (or both!) as Mike has already implied.
What also won't help is that Arq A is now in 8K mode (previously 2K), the same as Arq B was when on C67.
If you still have an Analogue TV or Video, try tuning into C67 to see if you can pickup any analogue signal, If so, this would be the source of your problem.
Also, very strong signals on one channel can also sometimes cause interference on other channels, typically C+/-1, C+5, C+9 if I recall correctly off the top of my head, where C is the channel number of the strong signal.
Eg. you could have a very strong signal on C66, C68, or C62 or C58 (but not the Mendip PSB3-HD mux, that won't be strong enough, but obviously if you have an HD setup and receive it ok, the interference won't be on that channel!). Best of luck investigating - get back if you need more help, or to let us know the outcome/cure.
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Sean:
C61,C54,C48,C52,C67 - this last one will move to C56 in March next year.
All are now 8K mode, so any old equipment that was only getting ArqA and SDN prior to Sept.28th will now get nothing.
HD mux is on C58.
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D Gadsden:
Woops, forgot Cirencester also affected, which is probably where you are, as you are still getting BBC mux, only D3&4 mux was affected here.
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JimBilly:
C67 should not really be a problem in itself unless you are in a more marginal reception area now that the Mux (Arq A) is in 8K mode.
Jack says he's getting 10/10 signal on the other muxes, so he probably isn't marginal.
It's possible that a lot of people who were previously getting Arq A in marginal areas will not now get it until the power restriction of 26Kw goes (and move to C56) which happens in March 2012. Why they couldn't have left it in 2K mode until then, I don't know! - (they probably want to shove in some more LCN's on the mux!).
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Saturday 5 February 2011 11:39AM
Briantist:
Hi Brian, an update to the "Transmission frequencies" section (just above "Notes") on this page would be a nice idea to resolve some confusion.
In the Note below "After Wednesday 7th April 2010" it still mentions C59+ for ArqB now on C67 until 28 Sep 2011, when it moves to C52. On the same date SDN moves to C48.
Also C48 and C52 are missing from the "After Wednesday 7th April 2010" mux list row.
Regards, Chris.