Hello Andrew,
I just read some facts that a bit different from your “alternative facts” regarding my questions #1 & #2.
The answers on questions 1 and 2 should be YES WITHIN THE BANDWIDTH and not just yes.
Digging deeper through the LMS7002M datasheet we can see just two separate PLL, one for the RX and the other for the TX part. This is a 2x2 MIMO device but within the bandwidth of 61.44 Mhz.
That means that I can not use the LimeSDR, let say for the simultaneous transmission on 150 MHz and 450 MHz if I want to build the satellite that is transmitting on two bands. The maximum gap can be not more than 61.44 MHz.
Same for the reception.
I do not blame you as you said that your technical background is not so profound, and mainly the RF designers should point that out in my questions.
This may be useful information for the others planning to do something similar I plan to do.