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+The RX directory contains RECEIVE ONLY Gnu Radio scripts. 
+
+The narrowband scripts, named with "RTLSDR", capture only 1MHz of data, thus making them suitable for inexpensive low bandwidth SDRs. 
+
+The "Meshtastic_US_allPresets.grc" is a 20MHz wide all-preset capturing script. You will need a HackRF, LimeSDR, BladeRF or other SDR that is capable of capturing 20MHz. The default configured device is a HackRF.
+
+All other scripts work with the RTLSDR, since bandwidth is limited to narrow bands.  
+
+European users have this much easier. The total band is much smaller, meaning you can capture all presets with just an RTLSDR for everything.
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