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All posts by JimBilly

Below are all of JimBilly's postings, with the most recent are at the bottom of the page.

J
Mendip (Somerset, England) Full Freeview transmitter
Thursday 29 September 2011 12:48PM

Jack

I think that your problem is channel 67 itself. As a higher frequency it is not robust and, for example, does not tolerate coax cable runs as well as lower channel numbers without attenuation even when the transmitted strength is the same.I have exactly the same problem with no reception on two tvs of channel 67 when all other multiplexes are fine, even channel 52 which is transmitted at almost exactly the same power as 67 at 25.7Kw.

Things will not improve until 67 moves back to channel 56 in March. As far as I can see there are no adjacent transmitters on 67 so I don't know why they can't transmit channel 67 stronger than 26Kw from now until March when Salisbury frees channel56 for high power transmission from Mendip.

Good luck

Jim

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Brian

It's back to the transmission frequency issue. C67 which now carries COM5 is at a significantly higher frequency (842MHz) than COM6 on C52(722MHz). This higher frequency does not travel very well and is prone to significant losses in co-ax cable runs. Even though C67 is transmitted at a very slightly higher power than C52 which in theory should deliver a stronger signal, in practice many installations will show less signal at the receiver due to the characteristics of the higher frequency. This is borne out by many of the comments above however never seems to be taken into account when transmitters are planned. Unfortunately unless you miss the Arq A channels enough to consider replacing your aerial or coax for around just 5 months of improved signal than the only option is to wait until March 28 when it moves back to C56.

It looks like many (including myself on 2 televisions) are in the same boat.

JimBilly


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J
Untitled
Tuesday 11 June 2013 9:22AM

Richard: Did you do a first time installation when the BBC multiplex moved slightly? If not your receiver may have just looked for new channels within the multiplex but not stored its new, slightly lower, frequency. Sorry if you already did this. Jimbilly.

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