I've just uploaded version 2 of my Spectrum Sense n Play GNU Radio Companion application, compatible with the current master branch of GNU Radio (git commit: dd387a3708196f382f0c1e8041077bf94038ae98).
It is currently setup to simultaneously monitor 4,000 6.25Khz channels
between 118MHz to 136MHz and picks the strongest one to tune in to. For
those of you who have an Ettus USRP2, N200 or N210 this should work out
of the box with the WBX daughterboard. For use with other
devices e.g. USRP1/RTL-SDR dongle you need to swap out the UHD source
block and alter the uhd_sample_rate variable.
Features in this version:
- Frequency block list -> Paste in center frequencies to block, seperated by a space e.g. "118575000 121500000 134175000".
- Hold -> Press to hold on frequency, press again to continue. - Skip -> Press to enable frequency skip mode, press again to continue. Use this when adding a new frequency to block. - Squelch -> Adjust so that transmissions are heard without listening to static.
- AM Demodulation -> currently configured to receive VHF airband transmissions. - Config File -> Uses a config file to save the squelch level and blocked frequencies.