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Comparing performance off different Receivers on very weak signals In this page I want to show the performance from different Receivers in ability to receive and show very weak signals I want to compare the following available receivers Demodulated signal and Spectrum display and/or Waterfall Spectravue and funcube dongle ICOM IC7300 ICOM IC7700 Perseus SDR Only demodulated signal Kenwood TS2000 Kenwood TS870 ICOM IC7100 Yeasu FT736 ICOM IC202
Demodulated signal and Spectrum display or Waterfall In my weak signal experiments and when I was working Aircraft Scatter I found that using a well performing Spectrum display combined with a waterfall it was possible to clearly see very weak signals still too weak to copy or even be audible. In using a funcube dongle and Spectravue with settings optimised for showing very weak signals I could see signals well before I could hear them In the next part I will show the spectrum display off
different receivers with signals signal to noise levels off : To be sure that I don't get differences in results caused by the different frontends I am using a high input level at the receiver frontend so that the noise floor from the signals I generated are at least 20 dB above the receivers own noise floor First off all my performance using Spectravue and a funcube dongle All these Spectravue pictures have been made using an FFT Ave of 5 and 12Hz resolution bandwidth 4dB@12 Hz = -20dB@3KHz
6dB@12 Hz = -18dB@3KHz
8dB@12 Hz = -16dB@3KHz
10dB@12 Hz = -14dB@3KHz
performance using Icom IC7300 |
