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Tech Head - The Technology Section
SDR radio, Software Defined Radio
The Aero Thread..
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<blockquote data-quote="s-band" data-source="post: 970592" data-attributes="member: 407744"><p>A few thoughts:</p><p></p><p>It's internal to the R820T front end</p><p></p><p></p><p>Yes, but, the max SNR achievable is set by the dish and LNB. The gain of the LNB is so high that as long as you are seeing at least 10dB noise from it when you switch it on and off you will not gain anything by adding more gain in your IF (the SDRs)</p><p>The SNR will also be affected by the back end bandwidth but that is set in JAERO.</p><p></p><p></p><p>Are the FFT parameters the same? They need to be if you are doing a comparison.</p><p></p><p>If a signal is close to threshold, it could be randomly decoded by one and not the other because of the nature of noise etc. If both are on the same PC, there could be timing issues due to processing, especially if running Airspy at 10Ms/s</p></blockquote><p></p>
[QUOTE="s-band, post: 970592, member: 407744"] A few thoughts: It's internal to the R820T front end Yes, but, the max SNR achievable is set by the dish and LNB. The gain of the LNB is so high that as long as you are seeing at least 10dB noise from it when you switch it on and off you will not gain anything by adding more gain in your IF (the SDRs) The SNR will also be affected by the back end bandwidth but that is set in JAERO. Are the FFT parameters the same? They need to be if you are doing a comparison. If a signal is close to threshold, it could be randomly decoded by one and not the other because of the nature of noise etc. If both are on the same PC, there could be timing issues due to processing, especially if running Airspy at 10Ms/s [/QUOTE]
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