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<blockquote data-quote="tony smith" data-source="post: 910555" data-attributes="member: 402577">Since start of the Christmas period Newsnet has been a good level, before that it was was very variable mostly below the thresshold of my 6902 Technomate, which will work down to a good -65 dBm.Today Newsnet is reading 14 dBm of carrier levelThe other ENG feeds on that TP are all over the place as to levels, highest is Boris(Border TV) has been measured at 15 dbm of carrier level.They are difficult to decode as they are only just over 4 Mhz bandwidth, most receivers are&lt; 8Mhz, so they may come up on more than one spot frequency, as they can squeeze in up to 10 carriers between Comms carrier at 18.503 xx Ghz(data)and Newsnet 18.556xx Ghzsome at HD mpeg 4, others at SD but still AVC codingDish size 1.8 metre offset, our own K band feeed horn. Norsat k band LNB l.o 17.250 Ghz.all above frequencies are V linear, most other satellite K band downlinks are Circular Pol.For the record our 1.8 metre dish and front end, works down to 9.5 dBm of carrier levelThe ITV companies have 2.4 metre dish, so they can cope with signal carriers down to 8 dBm of carrier level(inc bandwidth limiting of their receivers)The biggest problem with Ka uplinks and K downlinks, is rain, in all its forms can reduce the signal by half, in dense rain layers, so using DVB-S/S2 for SNG use will never be as reliable as Ku, but Data carriers can be a better option, so IP may be a way forward.</blockquote>

[QUOTE="tony smith, post: 910555, member: 402577"] Since start of the Christmas period Newsnet has been a good level, before that it was was very variable mostly below the thresshold of my 6902 Technomate, which will work down to a good -65 dBm. Today Newsnet is reading 14 dBm of carrier level The other ENG feeds on that TP are all over the place as to levels, highest is Boris(Border TV) has been measured at 15 dbm of carrier level. They are difficult to decode as they are only just over 4 Mhz bandwidth, most receivers are < 8Mhz, so they may come up on more than one spot frequency, as they can squeeze in up to 10 carriers between Comms carrier at 18.503 xx Ghz(data)and Newsnet 18.556xx Ghz some at HD mpeg 4, others at SD but still AVC coding Dish size 1.8 metre offset, our own K band feeed horn. Norsat k band LNB l.o 17.250 Ghz. all above frequencies are V linear, most other satellite K band downlinks are Circular Pol. For the record our 1.8 metre dish and front end, works down to 9.5 dBm of carrier level The ITV companies have 2.4 metre dish, so they can cope with signal carriers down to 8 dBm of carrier level(inc bandwidth limiting of their receivers) The biggest problem with Ka uplinks and K downlinks, is rain, in all its forms can reduce the signal by half, in dense rain layers, so using DVB-S/S2 for SNG use will never be as reliable as Ku, but Data carriers can be a better option, so IP may be a way forward. [/QUOTE]

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