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SDR radio, Software Defined Radio
The Aero Thread..
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<blockquote data-quote="Vipersan" data-source="post: 966782" data-attributes="member: 325666"><p>[ATTACH=full]92028[/ATTACH] ...yes those peaks/bursts are more clearly defined with the ESX ...but now I know why a PLL is recommended ..</p><p>I can set the marker on the waterfall ...but within a minute or so ...that marker is no longer under the signal ...it has drifted so no longer on target ..</p><p>Yes the ESX works ...but simply isn't stable enough ..</p><p>What this tells me is what I suspected all along ..</p><p>The ESX is a higher gain & lower noise lnb than the Titanium ... but drifts ...</p><p>Hence the need for PLL.</p><p></p><p>Check out this image for the very obvious lateral drift ...which is actually apparent also when listening to the beeps ...</p><p>you can actually hear doppler shift in real time..</p><p></p><p>and within 10 minutes not one single bit of L band Aero data remained visible in the zoomed waterfall ..requiring significant vxo shift to relocate it..</p><p>So ...I need the gain and noise levels of the ESX and the stability of the Titanium..</p><p>Perhaps the new C1PLL will be better ?</p><p>..or a total re-think regarding the lnb ???????</p></blockquote><p></p>
[QUOTE="Vipersan, post: 966782, member: 325666"] [ATTACH=full]92028[/ATTACH] ...yes those peaks/bursts are more clearly defined with the ESX ...but now I know why a PLL is recommended .. I can set the marker on the waterfall ...but within a minute or so ...that marker is no longer under the signal ...it has drifted so no longer on target .. Yes the ESX works ...but simply isn't stable enough .. What this tells me is what I suspected all along .. The ESX is a higher gain & lower noise lnb than the Titanium ... but drifts ... Hence the need for PLL. Check out this image for the very obvious lateral drift ...which is actually apparent also when listening to the beeps ... you can actually hear doppler shift in real time.. and within 10 minutes not one single bit of L band Aero data remained visible in the zoomed waterfall ..requiring significant vxo shift to relocate it.. So ...I need the gain and noise levels of the ESX and the stability of the Titanium.. Perhaps the new C1PLL will be better ? ..or a total re-think regarding the lnb ??????? [/QUOTE]
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The Aero Thread..
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