I used Pothos to create a block diagram for the LimeSDR that receives a local FM station and re-transmits it 1Mhz higher at very low power.
Limesuite was then used to 'scoop up' the settings generated by Pothos with the idea of closing Pothos and recreating the whole test using Limesuite alone.
The whole test worked nicely!

I then tried a similar thing in the LTE band 20 at 809 MHz, just repeating the whole base station Tx spectrum, using my trusted USD020 duplexers ..... And that worked too! I've been trying to do this for about 5 days, so why does it suddenly work now? I think the answer is that the Limesuite needs to be a 'blank canvas' before trying to scoop from Pothos, otherwise settings 'left over' from previous trials mess things up.

Files used:

https://cdn.hackaday.io/files/20500877072000/Simple_806MHz_Repeat 01.ini

https://cdn.hackaday.io/files/20500877072000/Simple 806MHz repeat 01.pothos

https://cdn.hackaday.io/files/20500877072000/FM retransmit 04.ini

https://cdn.hackaday.io/files/20500877072000/FM Re-Transmit 04.pothos