All posts by jb38
Below are all of jb38's postings, with the most recent are at the bottom of the page.
jamie stevens: Just a small correction to that said, re: > > but selecting which one of the four position switches dedicated inputs to latch onto < < I meant to say which "pair", not one.
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Wendy: If the distribution amplifier is the only thing that was changed then this should not have affected the Sky boxes RF2 feed to the other rooms, you should temporarily try removing the magic eye from the equation and change the boxes RF output feed from RF2 over to RF1, checking the results of this action on one of your bedroom TV's
As far as changing the RF output channel is concerned, this can in some cases result in an improvement to a grainy picture, although it has to be said that some newer boxes are known to suffer from a poor quality analogue output, however you can change the channel that its presently set on from the same menu as you used to switch the RF power on, because if the RF channel that's presently used is under 62 then change it to 68, saving the new selection.
Once you have completed this task select the "analogue" tuning menu on one of your bedroom TV's followed by carrying out a retune on same, this being for the purpose of recapturing the analogue signal from the Sky boxes RF1 / 2, not forgetting to store the channel once you have found it or it will vanish again when you change the TV back to Freeview.
If easily accessible, maybe you could inform me as to the model number of your new distribution amplifier, likewise the number on the old one if you still have it.
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Mazbar: Many thanks for the info, this aspect being something which I do have to admit had slipped my mind since having seen it mentioned a short time ago in a Philex catalogue.
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Wendy: On the basis of Mazbar's info, should you subsequently find that your Sky boxes RF modulator is already set on a channel in the 60's then try it on something much lower, because if this resolves your problem then this strongly suggests that your new distribution amplifier is one of those latest types Mazbar referred to.
However, if by any chance this doesnt completely resolve the problem then this might simply be caused by you having accidentally chosen a channel used by your local Freeview station, and so try another channel.
I am unfortunately unable to advise on the channels to "avoid" by being unaware of your location, this being why its always advisable to include a post code (or one from nearby) with any queries involving reception.
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Wendy: Thanks for the update, but with regards to the number provided of R13W25 this does not appear to be listed in the SLX / Philex catalogue, although one is seen that does match up with what you have said, it being a 28105RG model.
However irrespective of that, the fact of its top frequency being limited to 790mhz means that its operating range is limited to Ch60 max therefore the signal from the Sky boxes modulator will have to be set under this.
Your P/Code indicates that you are covered by the West Runton PSB only relay (no commercial channels) and your full service transmitter is Tacolneston, albeit that the reception predictor suggests that you are not in a particularly good area for reception from the latter, but as far as the Sky boxes RF modulator is concerned I would restrict your modulators channels to any between 31 - 37 to avoid the possibility of clashing with a Freeview channel.
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Callum: Dave and E4+1 are both on ArqA / COM5, and "if" you are covered by the Blackhill transmitter then you could try carrying out a manual tune on C44 / 658Mhz as this might recover the programmes mentioned, but though its maybe less hassle just to carry out another auto-tune as this usually solves the problem, but though if by any chance it hasn't, then you will have to carry out either a "factory reset" or "first time installation", both of being virtually guaranteed to rectify this issue and which is usually caused by either a glitch having occurred in the signal during the retune, or by corrupted data being stored in the tuners memory system.
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Callum: Re: problem, can you view (11) Pick TV or (82) Sky news? because those two programmes are also broadcast on the same mux transmitter as the ones that are missing, if though you cannot receive these programmes either then maybe you could indicate your locality, this in the form of a post code or one from nearby, e,g: a shop / Post office etc, as once known it would then enable a check to be made on the signal levels expected in your area.
Another point being, when you moved the TV a short distance from where it had previously been used did you have to extend the aerial lead? because if you did then check out the extension lead just in case its defective.
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Gweneh: Sorry for the delay in replying to your update on the outcome of the aerial installers visit, but pleased to see that your problem has been rectified.
I found your report on the standard of reception from Tacolneston interesting, and especially when compared to that given on Digital UK's trade predictor, this proving "once again" that RF signal prediction when of a non-satellite nature is very hit and miss affair to the extent that anything seen cannot be relied upon as even remotely representing fact.
By the way, Aldeburgh is one of the higher powered relay stations radiating on 10Kw, this being most likely why you can receive it so well even although your aerial is misaligned in both polarity and direction, and of course grouping albeit that the latter plays a somewhat lesser role.
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Callum: Re: extension cable, although you may have already tried this by now but unwind the cable and see if this makes any difference, because a coiled cable can create a form of tuned circuit and which can cause resonance to occur within the coil.
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Thursday 17 October 2013 9:29PM
jamie stevens: Multiswitch boxes do not operate on four different frequencies (or any in it comes to it) but over the entire intermediate frequency range of the LNB that its connected into, which in the case of Sky or Freesat is from 950 - 2150 Mhz.
Each of the outputs on a multiswitch box used for providing sat facilities in individual flats etc are internally connected into their own dedicated four position electronic switch that operates in exactly the same way as on a normal LNB, the only difference being that when a viewer is changing channels on a satellite box that's connected into such as a communal aerial systems multiswitch unit, the band / polarity control signals sent out from the sat box are not controlling the LNB but selecting which one of the four position switches dedicated inputs to latch onto, those being: Low band V - Low band H / High band V - High band H.
As far as your vertical / high band problem is concerned, is this problem occurring when your meter is connected into a quad block? or is it a Quattro type? because if the former and you have access to a scope then you should check that when your meter is set to measure the V / High output its supplying 12.5 - 14.5V DC as well as the 22Khz high band control signal.