The LimeSDR mini is supported by the Portsdown DATV system as a direct alternative to the Portsdown filter-modulator board and provides coverage from 30MHz to 3.5 GHz.
While the filter-modulator board might be the best solution for high symbol rate DVB-S QPSK, the LimeSDR Mini offers the potential to transmit more bandwidth efficient modes such as DVB-S2 32APSK at 1 MS and below and is ideal for Es’hail-2.
For more details see https://wiki.batc.org.uk/Using_LimeSDR_with_Portsdown and the forum thread dedicated to the LimeSDR Mini viewforum.php?f=120 This forum should be your first port of call for any questions you have about using LimeSDR Mini in a Portsdown system.
The LimeSDR Mini can also be used as a standalone SDR receiver covering 30MHz to 3.5GHz.
When using the LimeSDR Mini in a Portsdown system, as well as not needing the Filter Modulator board you do not need to buy an ADF4351 Local Oscillator board or to buy and build an LO filter module.