It is a fast HF modem. Could be data/text transfer, but the long transmissions are not typical of ARQ data transfer.
Probably digital voice 2-way comms. 73 Bonnie KQ6XA --- In digitalradio@yahoogroups.com, <oz1...@...> wrote: > I walked downwards and upwards in frequency (you can hear it on the MP3 > file) down > to 3.568 MHz and up to 3.585 MHz to find the span of this QRM. > Torben, OZ1TMK >
