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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Inmarsat .. something different
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<blockquote data-quote="s-band" data-source="post: 963137" data-attributes="member: 407744"><p>Interesting. Having just done this <a href="https://www.satellites.co.uk/forums/threads/retro-fitting-c-band-to-an-old-irte-1-5m-pf.167987/" target="_blank">Retro-fitting C-band to an old IRTE 1.5m PF</a> I had a look. I think I found the signals but they appear to be centred on about 3618MHz RHCP. The strongest ones are about 20dB s/n in 10kHz which should be enough to decode. They pop up all over the range though which will complicate things. Attached is a plot from an analyser max. held for about 5 minutes. It looks like there were 12 different frequencies over that time. Looking at single signals, the bandwidth seems bout right for the data rate. See the png attachment.</p><p>It is quite difficult to peak on those signals so I looked for a beacon. I think I found one on 3950.665MHz LHCP. It is in the range listed on Satbeams but could be from Express on 14W, perhaps. Does anyone know the beacon frequencies for Inmarsat-3F2?</p><p>[ATTACH]91116[/ATTACH] [ATTACH]91117[/ATTACH]</p></blockquote><p></p>
[QUOTE="s-band, post: 963137, member: 407744"] Interesting. Having just done this [URL="https://www.satellites.co.uk/forums/threads/retro-fitting-c-band-to-an-old-irte-1-5m-pf.167987/"]Retro-fitting C-band to an old IRTE 1.5m PF[/URL] I had a look. I think I found the signals but they appear to be centred on about 3618MHz RHCP. The strongest ones are about 20dB s/n in 10kHz which should be enough to decode. They pop up all over the range though which will complicate things. Attached is a plot from an analyser max. held for about 5 minutes. It looks like there were 12 different frequencies over that time. Looking at single signals, the bandwidth seems bout right for the data rate. See the png attachment. It is quite difficult to peak on those signals so I looked for a beacon. I think I found one on 3950.665MHz LHCP. It is in the range listed on Satbeams but could be from Express on 14W, perhaps. Does anyone know the beacon frequencies for Inmarsat-3F2? [ATTACH]91116[/ATTACH] [ATTACH]91117[/ATTACH] [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Inmarsat .. something different
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