All posts by jb38
Below are all of jb38's postings, with the most recent are at the bottom of the page.
Ian: Thanks for trying that test, but could you just confirm that this the result you get even although you have selected AV1 input rather than the usual HDMI1 "after" having pressed AV on your TV's remote control?
| link to this comment |
Duncan: Interference of the nature you describe is nearly always accompanied by fluctuating quality being seen when viewed on the signal check screen, the fact of you having a 10/10 indication suggesting that your signal strength is excessive.
Purely for test purposes, try removing the booster again and allowing the signal to drop under the 10 level thereby allowing you to obtain a more accurate check on the stability of the signal quality, further info dependant on indications seen.
By the way a (1) was missing from the post code entered, this having placed you at only just over 1 mile away from the Whitehawk Hill TX and so I used Worthing Post office as a test code.
| link to this comment |
Ian: Many thanks, although that now adds to my suspicion about the box having developed a fault, as virtually nothing should stop a signal passing between the AV1 sockets on two devices.
Should it transpire that you return the box to wherever purchased from (if still possible) I would appreciate if you could give an update on the result.
| link to this comment |
tim: If you have zero quality then its most unlikely that a new aerial would make any difference, therefore its the best procedure by far to check with a neighbour or someone else nearby for the purpose of find out if others are also being affected, or that the problem is simply confined to your own installation, and should it be, then the problem could be caused by a faulty connection where the coax joins into the aerials termination box, that is if not somewhere within the actual house dependant on where the cable is routed.
| link to this comment |
tim : Just to add, that its undeniable that the efficiency of you aerial will be down by ArqB having changed to mux Ch39 "if" you have a group C/D aerial fitted, this identified by a green blanking plug on the front of the horizontal boom that holds the elements, but to get an idea of the levels received in your area you should try a signal check on mux Ch42 (ITV3) noting the level, then try the same check again on mux Ch55 (BBC) and give an update on the result.
| link to this comment |
tim : I suspected that might be the case, and the reason why I had mentioned that its doubtful if a new aerial would make any difference to your particular problem, basically because that any measures taken to improve reception such as the fitting of a more suitable aerial is dependant upon a low strength, but stable signal being there in the first place, and in your case with it not being as far as Ch39 is concerned.
However in cases where one mux channel is erratic its sometimes found that a dramatic increase on strength / quality can be had by moving the aerial slightly to the left or right of its present position, but though its essential that first of all local enquiries are made with neighbours etc to find out if the signal is actually receivable in the first place (mux Ch39 best referred to as (15. Film 4) or (24. ITV4) as in many cases its not due to variety of reasons, but if it is received by others then that indicates that the aerial experiment referred to might bring results, although obviously it wouldn't if neighbours cannot receive it either.
That said though, nothing can be discounted where RF signals are concerned, and the problem on Ch39 could simply be caused by that mentioned in my original reply, i.e: that of a faulty connection on the aerial, but other factors can also be responsible such partial signal path blocking caused by trees, as the blockage they cause to an RF signal can affect some mux channels much more than others dependant on the density of the foliage.
Anyway, I suggest that your priority should really be to find out if others nearby can receive the signal and take it from there.
| link to this comment |
Peter Kaye: Although the station referred to cannot be completely taken out of the equation as far as your problem is concerned, I very much doubt if its connected in any way to it as the towers seen at the station are used for beaming microwave links seawards, and these would have no effect whatsoever to the UHF frequencies used by Freeview.
As this is problem is known to happen about the same time each day it would be best if you could check with others to determine if they are also being affected, as they may or may not be, and if not then it has to something very local to your own property either by interference being radiated or alternatively injected via the mains supply.
A good way to verify which is to use a small portable radio with an LW (preferable) or MW waveband, and if LW tune it to the side of but not actually on radio 4 and turn up the volume, this followed by placing it near to any mains cables in plastic trunking or just close to a power outlet shortly before the time that this problem is known to occur, because if the interference is injected into the mains then you will hear a loud purr or crackle through the portable.
| link to this comment |
Peter Kaye: In addition to that said, if the interference is being radiated from some unknown source then use a portable VHF/FM radio with its telescopic aerial fully extended, then as done with the LW radio tune it to a blank space in the band and turn up its volume, because any interference of a non specific frequency being radiated will be heard as a high pitched raspy type noise.
By the way, with this test its not really necessary to place the radio near to a power socket.
| link to this comment |
Saturday 18 May 2013 1:45PM
Ian: Just to satisfy my curiosity about something there is one final test that I would like you to try, and being, rather than using the HDMI lead between the box and the TV try using a scart connection between the AV1 sockets on both devices and see if this changes anything.