A few pics with the signals right at the output of my ADALM-Pluto in the 2390 MHz band, before amplification. In order or appearance: 4FSK, DQPSK, GMSK. I don't normally use the GMSK modem due to it's slightly lower performance, it's just there to spite my D-Star-using friends. Audio payloads are Codec2 and Opus.
The amplification chain has two stages: first to ~16 dBm, second one to ~36 dBm.
@n8dmt








