All posts by KMJ, Derby
Below are all of KMJ, Derby's postings, with the most recent are at the bottom of the page.
Roy Trubshaw:The problem seems to be single frequency interference on C44+ causing loss of Mux2 from Sutton Coldfield.If there was a transmitter problem there would be dozens of complaints about loss of ITV1! Make sure all cables and connectors are in good order.Do you have any amplification on the aerial? If there is, analogue ITV1 0n C43 could be overloading your tuner.Otherwise try moving the receiver, turn off other equipment, disconnect any HDMI cables etc. Regarding Mux2 reception from The Wrekin, the signal will increase in strength when MuxD3+4 begins on 20th April 2011. This might prove to be a more robust signal despite coming from behind the aerial.
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Chris Gill: If you are able to receive MuxC from more than one transmitter it is likely that your PVR found a weak signal (possibly from Hannington) and stored the channels from it before the scan reached the stronger Mendip signal.You will need to do a manual tune to C56+ for MuxC in the same way that you did for Mux BBCA (C61) in order to receive the correct BBC1 region.
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john: Your local transmitter is a PSB only relay (Freeview Lite).ITV3 is transmitted on the SDN mux which is only available from the original 81 digital transmitter sites. The owners of the COM muxes declined to extend the coverage to other sites on economic grounds.
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liam boyle: Careful repositioning/relocating of the aerial might provide an improvement to the reception of Mux2. However with switchover due to complete on 25th May 2011 you might prefer to wait and see before adjusting the aerial..The signal for Mux D3+4 will be five times stronger than that of the present Mux2.
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Alan Butler: The digital switchover dates differ according to which transmitter you are using for your TV reception. If you are tuned to the Nottingham/Kimberley transmitter switchover step1 takes place on Wednesday 30th March 2011. Switchover step2 is on 13th April 2011. There will be a retune date on 24th August 2011 when Mux ArqB changes frequency to C48, and a further retune on 27th September when Mux SDN changes frequency to C51 and Mux ArqA to C52.......................If you are using the Waltham transmitter there is a retune on 30th March when MuxA/SDN changes frequency to C29 and another retune on 13th April 2011 when Mux2 changes frequency to C31. Switchover step1 is on 17th August 2011 and switchover step2 is on 31st August 2011. A retune will also be required on 12th October 2011 when Mux SDN changes to 8k mode and power is increased......If you use Sutton Coldfield switchover step1 is on 7th September 2011 and switchover step2 is on 21st September 2011.
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Honest John: According to the Digital UK postcode checker reception from Rowridge is marginal to poor at your location with no reception at all shown for MuxB. As you say, Mendip is shown as offering good reception on all six muxes. It is interesting to note that after switchover you are not expected to receive the COM muxes at all from Rowridge due to co-channel interference. You might find that an aerial on Mendip linked via a group A to E diplexer to a second aerial on Rowridge will be needed to receive all services and the correct local news! Regarding your father's location reception from Rowridge is somewhat better after switchover,the COM muxes being shown as variable, although if he still has reception problems then, his aerial could benefit from being set to a new vertically polarised signal which is due to be added at Rowridge after switchover in 2012. There is no alternative signal from Mendip shown for BH15 2QE.
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Jamie: It depends on which transmitter you are using whether switchover takes place this year or next. Emley Moor and the Heyshaw relay will switch on 7th September (step1) and 21st September 2011 (step2).Note that reception from Heyshaw which will only carry the PSB muxes (Freeview Lite) could be adversely affected on two of its muxes by signals from Belmont using the same frequencies. Emley Moor is predicted to be poor to variable. Bilsdale and Pontop Pike which switch over during 2012 are both expected to offer good reception on all six muxes.
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Jack Hodgkiss: The Freeview HD service from both Keighley and Skipton begins on 21st September 2011. Your daughter might prefer to use Keighley after switchover as this transmitter will carry all six muxes. The Skipton transmitter will only carry the three PSB muxes, a Freeview Lite transmitter.
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Hertfordshaz: The easy bit first, services are expected back on air at Sandy Heath by 6am. The schedule for channel changes and power increases is rather complicated though.(1) Mux BBCA (C27) launches at high power on 30th March 2011 for switchover step1.... (2)Switchover step2 on 13th April 2011 will give Mux D3+4 on C24 and Mux HD on C21+ both at high power. Mux ArqB will be on C67 in 8k mode with temporary reduced power working....(3)On 31st August 2011 low power MuxA changes frequency to C31....(4)On 14th September 2011 Mux ArqB changes frequency to C48 at high power and MuxC transfers to temporary frequency C67...(5)On 23rd November 2011 MuxC/ArqA changes frequency to C52 at high power and 8k mode...During 2012 (dates tba) MuxA/SDN will change to 8k mode on C51 at high power. A power increase is also shown for the PSB muxes suggesting that initially the high power signals will be at (slightly) reduced power until switchover is completed in other regions.
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Sunday 27 March 2011 12:56PM
BRIAN: If you currently have good reception on the analogue channels you should have no problem receiving the PSB muxes after switchover in April 2011.(They will use the same frequencies as the current analogue transmissions). The Digital UK postcode checker shows you should have good reception of the COM muxes after 28th September 2011. Note that the frequencies to be used for the COM muxes lie outside the range used for the analogue services. As a result a wideband or a group K receiving aerial will be needed for best reception of all muxes.