Hi, so this problem came with me using the trx-duo and its latest fw update, its now possible to run 16x 48khz slots for grabing ft8 wspr, qrss etc over 16 different bands/freqs, the fw with its backround is avalible here
https://github.com/fventuri/red-pitaya-notes/releases the problem is that f-cal does nothing, not in + or in negative numbers, Im using latest 995 on windows and tested lots of the version avalible on the this google group all the way back to the old v33 but all the same, the receiver/s present itself as Angelia np 8 - see screenie.
the fcal worked fine on all othre rx I tried, like Hermes lite2, and the pd-sdr
73
Mikael - SA6BSS