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SDR radio, Software Defined Radio
Antenna thread
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<blockquote data-quote="s-band" data-source="post: 972437" data-attributes="member: 407744"><p>With a wide sweep your bandwidth will be wide and you will not see narrow band signals at the kind of levels we get from Inmarsat. Set to 10MS/s, decimation = 4, centre freq circa 1545.5MHz.</p><p></p><p>I just tried waving the helical in front of the dish and got the following EbNo: 25E 15dB, 15W 13dB, 54W 13dB on the 10500 bps sigs. It said 50dB on the 600bps (must be the maximum, doesn't make sense). Being a PF dish I had it at about 10W to get 25E and 30W to get 15W & 54W i.e. using the dish as an offset and keeping myself out of the beam. It's abit difficult to hold in place for very long though! I view SDR# and JAERo via VNC on an Android tablet. It is just about possible to control it via the android but fiddly.</p><p></p><p>I'm using a 0.3dB NF LNA which I had left over from the S-band kit for Arabsat and re-tweaked for 1.5GHz</p></blockquote><p></p>
[QUOTE="s-band, post: 972437, member: 407744"] With a wide sweep your bandwidth will be wide and you will not see narrow band signals at the kind of levels we get from Inmarsat. Set to 10MS/s, decimation = 4, centre freq circa 1545.5MHz. I just tried waving the helical in front of the dish and got the following EbNo: 25E 15dB, 15W 13dB, 54W 13dB on the 10500 bps sigs. It said 50dB on the 600bps (must be the maximum, doesn't make sense). Being a PF dish I had it at about 10W to get 25E and 30W to get 15W & 54W i.e. using the dish as an offset and keeping myself out of the beam. It's abit difficult to hold in place for very long though! I view SDR# and JAERo via VNC on an Android tablet. It is just about possible to control it via the android but fiddly. I'm using a 0.3dB NF LNA which I had left over from the S-band kit for Arabsat and re-tweaked for 1.5GHz [/QUOTE]
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