All posts by Lynn Steenson
Below are all of Lynn Steenson's postings, with the most recent are at the bottom of the page.
Peter Henderson: I cant find a built in amplifier option on the tv.
Could gain be a problem after DSO?
Exact same aerial/amplifier setup before DSO and we were receiving all freeview channels before?
Could it be because Divis is only broadcasting the COMs at half the strength of the PSBs? 100,000 watts for PTSBs and COMs only at 50,000 watts?
Is this likely to change?
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Dave Lindsay:
The aerial isnt a yagi .
From reading the aerial page here I think it falls into the Digital High Gain class 2 category.
It is described as "48 Element High Gain Digital TV Aerial".
All freeview channels were being received before the DSO using this exact same aerial set up.
I cant get any indication of strength/quality for any of the COMs.
Would it be down to the different output power levels from Divis?
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Dave Lindsay: I have discovered the antenna levels for the Coms *before* scan are:
COM 4: antenna level 58 quality 0
COM 5: antenna level 50 quality 0
COM 6: antenna level 38 quality 0
The Coms we cant get are listed in the guide but once you select them there is no picture.
On doing this I was able to get another reading of the strength/quality of the channel.
E.g.
Dave in COM 5: signal strength 92 quality 0
Quest in COM 4: signal strength 95 quality 0
and to compare
UTV in PSB2: signal strength 99 quality 100
BBC1HD in PSB3: signal strength 96 quality 100
Does this shed any light on what is goin on?
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Dave Lindsay:
I have tried to bypass the amplifier but if I do that i get no channels at all.
Its an old one- Fringe Electronics Hi-Current P1290, its either on or off no turning up or down!
Yes we are indeed in the green area on the map above!
We are currently receiving all saorview channels and (freeview apart from the coms.)
Do you think if we were getting the coms before the DSO with current aerial/amp that maybe it could be the power strength that Divis is broadcasting the coms? It being only half the strength of the psbs?
I used the digital tv postcode checker for coverage of a BT postcode BT603DP in N.Ireland which is close to us.We are not far from the border!
It shows good reception for the psbs and variable reception for the channels we are missing!?
Thanks for all your help so far.
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Dave Lindsay:
We also have a Fringe Mini 4 Distribution Unit 40 - 860 Mhz.
It has one input and 4 x 6db. outputs.
Would the amplifier be built into this?
I also tried to bypass this but no success!
I think I will get the suggested variable attenuator and take it from there.
Thank you!
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Dave Lindsay: This distribution unit is fed directly from the 48 Element High Gain Digital TV Aerial.
The receiver is built into the tv Samsung LE40D503F7W.It picks up the saorview channels fine.
I also have an Echostar HDT610RGB which picks up the HD channels and saorview as well.
All other tvs just have cheap Freeview boxes eg Alba/Bush but im mainly concerned with the main tv and echostar.
I can see i have the option of DVB-T and DVB-T2 in the echostar box but once i choose DVB-T2 on channel 23 the signal strength 0 and quality 0.
with DVB-T on channel 23 for example I have 58 signal level and 0 quality.
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Dave Lindsay: I got the suggested attenuator but not having any success.
It reduces the signal strength only. for example on ITV3 (within the guide), original signal strength is 96 and quality is 0.
When I use the attenuator and I reduce signal to say 75 the quality remains at 0.
The attenuator seems to have no effect on the signal quality at all.
There is a very distorted jumpy picture on ITV3 when signal strength is at 96!
Do I maybe need a bigger amplifier?
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Jb38: I did a retune with the aerial disconnected.Then the list of channels is empty. Then after connect aerial ch23 quality is still zero. As you can see above I tried an attenuator but to no avail. Any other ideas?
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jb38: No we can not get the COMs on any other boxes.
Only wen i add the channel manually will it appear in the tv list (using main tv or echostar) then once i check the signal within the guide its level varies but quality always 0 e.g. ITV3
Before the DSO we got ALL channels at the same set up/position of aerial.
Yes we are about 42miles from Divis and are within the green area on the map above.
So you reckon we need to maybe move the aerial slightly? even though before DSO we got all channels fine?
Thanks for your help!
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Page 1
Wednesday 16 January 2013 10:32PM
We live in Clontibret Co. Monaghan.
Before the DSO we received all freeview channels from Divis. We have a high gain digital horizontal aerial.
Since the DSO we can only get PSB1,PSB2 + PSB3 multiplexes. We cant get COM4 COM5 or COM6 multiplexes.
Any ideas what we could do to get all the freeview channels that we did before the DSO.
(aeriel has not been touched).