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The Aero Thread..
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<blockquote data-quote="s-band" data-source="post: 967670" data-attributes="member: 407744"><p>I thought that the L band was ground station to aircraft and C band aircraft to ground?</p><p></p><p>Confucian, I forgot to say that, on my set-up, 25E is LHCP and 15W RHCP. I checked polarisations based on Arabsat 20E and other TV but am only getting 15dB X polar rejection. It is worth tweaking the position of the plate fore/aft in the feed as I found I could get 1.5dB improvement moving it out a little from the end stop.</p><p></p><p>I think I've found the beacons and it is easier to peak the antenna on them than the aero stuff. The beacons have sidebands out to about +/-150kHz. CW frequencies at IF and within about 1kHz:</p><p>15W</p><p>1199.3285MHz LHCP</p><p>1197.4815MHz RHCP</p><p>1202.4785MHz RHCP</p><p>(with the T channels on RHCP at 1533.953 and 1534.500 (SDR VFO)</p><p>25E</p><p>1198.9975MHz LHCP</p><p>(T channels 1526.078 and 1526.108MHz also LHCP)</p></blockquote><p></p>
[QUOTE="s-band, post: 967670, member: 407744"] I thought that the L band was ground station to aircraft and C band aircraft to ground? Confucian, I forgot to say that, on my set-up, 25E is LHCP and 15W RHCP. I checked polarisations based on Arabsat 20E and other TV but am only getting 15dB X polar rejection. It is worth tweaking the position of the plate fore/aft in the feed as I found I could get 1.5dB improvement moving it out a little from the end stop. I think I've found the beacons and it is easier to peak the antenna on them than the aero stuff. The beacons have sidebands out to about +/-150kHz. CW frequencies at IF and within about 1kHz: 15W 1199.3285MHz LHCP 1197.4815MHz RHCP 1202.4785MHz RHCP (with the T channels on RHCP at 1533.953 and 1534.500 (SDR VFO) 25E 1198.9975MHz LHCP (T channels 1526.078 and 1526.108MHz also LHCP) [/QUOTE]
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