All posts by David
Below are all of David's postings, with the most recent are at the bottom of the page.
Oops. Misspelled my twitter name in last post!
BTW signal quality is variable amongst channels - why is this if they all broadcast at one of two power levels?
Ch Strgth% Qual%
22 40-50 100 BBCA
23 20-25 85-100 SDN
25 35 100 3+4
26 0-20 zero ArqA
28 zero zero BBCB
29 30 1 ArqB
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I have checked out the masthead amplifier and have found it is a Triax 13A Grouped MA.
The specs say it works from ch 21-34, so I am assuming this is not the problem? Presumably it will need to be swapped out if I ever try to rotate the aerial to pick up Black Hill after DSO though!
There is barely enough signal when the masthead amp is disconnected, although the same channels are scanned by the TV (they pixelate when watching though).
I usually find 46 DTV programmes and 16 radio on a full scan (chs 22,23 & 25). On the odd occasion an additional 17 channels are found on ch 26.
I have noticed that the picture quality is equally good by simply feeding the cable through an internal distn amp, without the masthead attached.
I am back to the main question, how come ch 28 is blank when chs 22 and 23 are so strong??
Thanks a lot for any help!
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David B, Same problem here. HD is there one minute with great signal, gone the next.
I am gonna see if I can get a more reliable signal from Black Hill after it goes DSO.
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Wednesday 25 May 2011 10:48AM
I live in Glasgow City Centre, nr Charing Cross. Area is notorious for poor reception - I think Garnethill blocks the Blackhill signal. Hence my (wideband tri-boom) aerial, which was fitted before I moved in, points south to Darvel. I have a mast head amplifier attached (although it is in the loft not at the aerial itself).
BBC freeview channels were fine, but STV was unwatchable. Analogue was awful.
Have noticed a massive improvement in STV on Ch 23 after DSO today. Signal strength wavers between 40 and 50%, but quality is pushing 100% according to telly menu.
No signal on Ch 26, 28, 29 though - so no Sky News or HD channels!
Any advice?