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All posts by jb38

Below are all of jb38's postings, with the most recent are at the bottom of the page.

J
BBC Four HD
Wednesday 23 April 2014 7:29PM

Alan Nicholson: A quick check of the aerials installed in your area revealed all as being "horizontally" mounted and pointing in the direction of either Pontop Pike or Bilsdale, some of both stations, whereas aerials used for reception of the Fenham transmitter require to be "vertically" mounted to suit the polarity of the transmitter, the question being is yours?

The other point being, that a reception predictor check does not indicate Fenhams COM7 transmitter as being operational as yet, this raising the possibility that the BBC4HD you are receiving is originating from the Pontop Pike transmitter (@ 11 miles / 242°, or possibly Bilsdale @ 43 miles / 159°.

This can easily be checked out by carrying out a signal strength test on BBC4HD, not quite so much for checking the strength but noting the mux channel number seen listed along with the signal indication, if its C33 then its Pontop Pike, whereas if C31 its Bilsdale and which will also be used by Fenham, the reception from seen as being in the category of "variable".

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david: Although what you have said re: "stopped working" would appear as being self explanatory, but purely out of curiosity can it be assumed that this also includes the "reception" of programme channels?

The only reason for asking being, that although its not exactly unheard of for the hard drive fail after a period of prolonged use, it is however extremely unusual for the receiver in a 9300 to fail and which is inclined to point to failure of a component in the power supply.



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Christine Clarke: Thanks for the update, however with reference to the content of, when you tried retuning the TV at Wimbledon Park last year "if" this was carried out using the aerial supplied with the set then reception cannot always be guaranteed using this type of aerial even although it might well have been satisfactory at home, as reception is not only dependant on terrain conditions (trees / high buildings etc) associated with where you are located within the Wimbledon Park area but also the screening effect of the walls in the building you are tuning the set in.

Judging by what you have said, if the W / Park location does not have an external (or loft) aerial installed then your best policy is to try and retune your TV whilst its temporarily connected into one in the same area as yourself, this being purely for the purpose of storing the channels into the set thereby making it considerably easier to experiment with the positioning of the aerial supplied with same by knowing that the TV is pre-tuned.

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Martin Gibbs: As no faults have been reported as far as Sutton Coldfield's BBC on mux C43 is concerned you should try and make one or two local enquiries to find out if others are being similarly affect to yourself.

I also noticed that B76 is an area of only 4 miles or so away from the powerful Sutton Coldfield transmitter, and as such purely out of curiosity I wondered what kind aerial system you use?

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jason: Although I wish you good luck with your system updating, but in general terms you should never attempt to carry out a system update if even the slightest suspicion exists that a "no signal" message "might" be connected with work carried out on the coax cables feeding into a Sky box, the danger being that you could possibly end up by corrupting / destroying the boxes software operating system, something which is not recoverable.

By the way, this is partially the reason for the "do not disconnect from the mains or satellite dish" warning.

The disconnecting the box from the mains procedure is however perfectly OK.

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J
Dave
Saturday 26 April 2014 5:32PM

Ruth vH: Dave (12) is transmitted on the same multiplex channel as used by PickTV (11) and Sky News (82), are those latter two programme channels also problematic?

It would also have been of assistance if you had given an idea of your location, this in the form of a post code or one from somewhere nearby, e.g: a shop / Post Office, as this would then have enabled info regarding the transmitter to be accessed.


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Christine Clarke: If you are indeed using a DA100C model, then according to the manual for same all you require to do is follow the procedure described in paragraph 5 under the "DA100C quick start guide" at the start of the manual, an excerpt from shown below.

-------------------------------------------------------------------------------------

If you have done the first time installation before, and would like to
search for Digital Freeview channels again, or if you have moved to a
different region and need to scan channels again,

Press MODE to switch to Digital TV & Media Player mode.

Press MENU, select "Digital TV" by pressing ENTER.

Select "Installation", then select "Auto Search" then press ENTER.

Once the search has finished, press CH+, CH- or EPG to select channels.

Press TV/R to switch between Freeview TV and Radio channels.





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Sam: In addition to that said by MikeB, have you as yet verified that the problem you are suffering from is also being experienced by others in your area? because if its caused by some oddball problem connected with the transmitter then it should also be affecting other viewers receiving ITV on Mux C23 (490Mhz) from the Wrekin transmitter.

The other point being, when you say that the signal strength and quality is 100%, then does this still apply where the "quality" is concerned when the picture freezes? In other words, if you leave the TV sitting on the signal check screen and observe it over 5 to 10 minutes or so, is the "quality" seen to dive downwards now and again?

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J
Full technical details of Freeview
Tuesday 29 April 2014 12:03AM

John Candler: When you say that your signal is mostly OK, it really depends on what this represents as far as the "strength" and "quality" of the signal is concerned, especially the quality!

Therefore you should carry out a signal test during daytime hours followed by one later on in the evening / night time whilst on these (Sudbury's) higher channels, namely (11) Pick TV mux Ch60, (10) ITV3 mux Ch58, making a note of the levels seen on both occasions for comparison purposes later on.

The reason for requesting the two sets of checks is because that the problem you are complaining of is inclined to suggest that although the picture might well appear to be OK during the daytime the actual levels involved are not that terribly high, whereby should they fall off slightly in the evenings due to naturally occurring atmospheric reasons, they might then be hovering at not too far above the minimum threshold level required for reception and which can cause problems of the nature described by yourself.

Although another possible reason does exist connected with the fact that three mobile phone masts are seen to be positioned in your area, because "if" one of these masts happens to be radiating a 4G signal then this can affect the reception of the high channels (Ch60 downwards) due to its powerful signal having a swamping effect on your receivers tuner, the effect of obviously being greater if the Freeview signal is falling off during night time hours.

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J
Full technical details of Freeview
Tuesday 29 April 2014 8:00PM

M. Archer: As the new COM7 channel is transmitted on Ch33 then your present C/D aerial will be inefficient when receiving this much lower frequency due to the active element of the aerial being too short, therefore yes! you would be much better to change the aerial to such as a Log36 as can be seen on the undermentioned link.

Online FM DAB TV Aerial sales

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