The project I'm working on (an SDR for a spacecraft communication groundstation) needs to transmit VHF at around 145 MHz. There seems to be a distinct "gap" in the transmit capabilities of the USRP daughterboards between 32 MHz and 400 MHz.
I'm looking for suggestions as to how to best accomplish this. My initial thought was to output at 10 MHz using an LFTX board, and upconvert to 145 MHz with an external mixer, LO, and filter. This seems straightforward, but would be a custom implementation, and my project wants to stay with commercial-off-the-shelf if possible. Another suggestion was to skip the modulation (GMSK) and output the baseband signal with an LFTX. This could then be fed into a commercial off-the-shelf VHF FM transmitter. I was also wondering if it would be possible to modify an RFX-400 daughterboard to go down that low (Matt?). Anyway, I was hoping to hear what people thought of these suggestions, and any others they might have. @(^.^)@ Ed _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
