All posts by Dave Lindsay
Below are all of Dave Lindsay's postings, with the most recent are at the bottom of the page.
Colin W: Because the others are "affected" less.
Because different frequencies are affected in different ways. This being particularly so in cases such as yours where there is no line-of-sight to the transmitter and therefore that you are relying of defraction (signal bending) around objects such as the higher ground over which the signal 'travels'. As things heat up, for example, the angle of defraction may change and therefore what was a good spot (which is presumably why your aerial was sited as such changes.
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William T G Gordon: There are a number of possibilities so there is not a straightforward answer.
Divis is the main Freeview transmitter which serves you. The "NI Mux" (aka NIMM) which carries RT One, RT Two and TG4 broadcasts from Black Mountain. Because they are close together a single aerial will usually work for both.
To receive the NI Mux a Freeview HD receiver will be required, even though the pictures are standard definition.
If you have a second aerial which you used to use to pick up RT and other channels from the South the feed for which is combined with the Divis one then this may preclude reception of the NI Mux.
The reason is that the NI Mux is on UHF channel (frequency) 39. The combining unit (the diplexer) will "split" at a particular channel, meaning that the Divis aerial is used for all channels below the split and the other aerial (perhaps Clermont Carn) will be used for all channels above it.
So Divis uses channels ranging from 21 to 29. Clermont Carn uses channel 52. Diplexers often split at 36 or 38, this meaning that the aerial not facing Divis will be used for C39.
If you have a good enough digital (Saorview) signal from Clermont Carn then a Freeview receiver should be able to be used to view it. The services will probably be placed in the 800s.
To do this a Freeview HD receiver will definitely work. Some Freeview standard definition receivers will work, but many others will pick up the signal but give no picture.
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Lisa: Feed the aerial lead into one of the boxes then out and into the other box and then out and into the TV.
I suggest that you connect the HDD/DVD box using one cable: either HDMI or scart. If you're not careful everytime you watch it the scart input will be seized on the TV, meaning that you are viewing via the scart lead and not the HDMI lead.
If the TalkTalk box has HDMI out then use it else use scart. If you are using scart then there are a number of different standards and it is the box "supplying" the picture where this can be set. Use "Component" if available, or else "RGB". This will be in the settings somewhere, perhaps "Video out" or something similar.
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Laura: Really has moved to logical channel number 17. A retune should result in the services taking up their new positions.
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Paul Tatler: Try swapping aerial leads. Dodgy connections could potentially affect one channel/frequency whilst apparently leaving others unscathed.
COM6 is on UHF channel 48, so use a TV or box with a manual tune function. Once on the manual tune screen select or enter 48 but do not press the button to scan/add services, rather wait and see if it gives any indication as to strength and quality.
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fiona weatherall: I would say it hasn't "gone" green and blue, but that red has gone.
Check that one of the pins on the scart plug has not been bent over, which results in it not making contact. Similarly, examine the scart socket on the Freesat box. Try a different scart lead. If you don't have one to hand, swap the lead round end-to-end.
See: SCART - Wikipedia, the free encyclopedia
Pins 13 and 15 are for red. The picture under the heading "Pin out" shows the pins as when looking at the female connector (on the rear of the Freesat box). Obviously the plug will effectively be the opposite way on.
This cannot be an issue with the cable from the dish.
Failing the above, changing the video out from "RGB" to "Composite" will probably work, albeit that it isn't as good a quality picture as RGB (when it's working that is!).
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Paul: Judging by the fact that Digital UK predicts no reception at your location I assume that you aren't in a good signal area and therefore may have a mast-head amplifier.
Perhaps it has failed. A light being on on the device itself or on its power supply doesn't mean that it is functioning normally.
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Monday 29 July 2013 12:46PM
marilyn: Drama is carried on one of the Commercial multiplexes which not everyone receives. If you get ITV3 then you have the multiplex which carries Drama.