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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
A 3.7m Prodeline dish for Astra 2D
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<blockquote data-quote="pjgregory" data-source="post: 558871" data-attributes="member: 288654"><p>Corviello suggested I make some signal strength measurements during the day to get an idea of the variation. These are all taken with my Satlook NIT spectrum analyser inside the house at the end of about 50m of coax. Times are all local Europe summer time (BST +1).</p><p></p><p>The first number is the measured signal strength in dB, while the number in brackets is the S/N ratio, again in dB, once the meter had locked onto the signal. All measurements fluctuated by 0.5 - 1.0 dB over a 1-2 sec time period so these are the peak readings obtained.</p><p></p><p>10729V 10773H 10847V</p><p></p><p>8am 59.6 (9.1) 56.3 (7.6) 58.3 (6.6)</p><p></p><p>11am 58.6 (9.0) 55.9 (7.5) 57.9 (7.5) </p><p></p><p>2pm 58.7 (9.0) 56.1 (7.7) 57.6 (6.6)</p><p></p><p>4pm 58.6 (9.0) 55.7 (7.5) 57.1 (6.2) </p><p></p><p>6pm 58.4 (9.0) 55.9 (7.5) 57.1 (6.1)</p><p></p><p>8pm 57.0 (7.4) 53.4 (6.0) 55.8 (No Lock)</p><p></p><p>10pm 57.1 (7.6) 54.6 (6.1) 56.1 (4.7)</p><p></p><p>There are signs of a gradual fall off in signal during the day with a marked reduction at about 8pm although this seems to improve again later.</p><p></p><p>Another point. Corviello used a RO.VE.R SDA 6 digisky meter. This seems to be much more sensitive that my SatLook. When aligning the dish, this meter would lock to a weak signal, while the SatLook would only show noise. He measured C/N (S/N) values of12.5 dB on 10773H at 4.pm and 12.0dB at 6.pm compared with mine in 7.5dB range.</p><p></p><p>Anyway - it is all still working and that is what really matters.</p><p></p><p>PJG</p></blockquote><p></p>
[QUOTE="pjgregory, post: 558871, member: 288654"] Corviello suggested I make some signal strength measurements during the day to get an idea of the variation. These are all taken with my Satlook NIT spectrum analyser inside the house at the end of about 50m of coax. Times are all local Europe summer time (BST +1). The first number is the measured signal strength in dB, while the number in brackets is the S/N ratio, again in dB, once the meter had locked onto the signal. All measurements fluctuated by 0.5 - 1.0 dB over a 1-2 sec time period so these are the peak readings obtained. 10729V 10773H 10847V 8am 59.6 (9.1) 56.3 (7.6) 58.3 (6.6) 11am 58.6 (9.0) 55.9 (7.5) 57.9 (7.5) 2pm 58.7 (9.0) 56.1 (7.7) 57.6 (6.6) 4pm 58.6 (9.0) 55.7 (7.5) 57.1 (6.2) 6pm 58.4 (9.0) 55.9 (7.5) 57.1 (6.1) 8pm 57.0 (7.4) 53.4 (6.0) 55.8 (No Lock) 10pm 57.1 (7.6) 54.6 (6.1) 56.1 (4.7) There are signs of a gradual fall off in signal during the day with a marked reduction at about 8pm although this seems to improve again later. Another point. Corviello used a RO.VE.R SDA 6 digisky meter. This seems to be much more sensitive that my SatLook. When aligning the dish, this meter would lock to a weak signal, while the SatLook would only show noise. He measured C/N (S/N) values of12.5 dB on 10773H at 4.pm and 12.0dB at 6.pm compared with mine in 7.5dB range. Anyway - it is all still working and that is what really matters. PJG [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
A 3.7m Prodeline dish for Astra 2D
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