LimeSDR TX and unknown features in RX

[ricardas]

@OCB

I have tried thousands of diferent combinations of these settings and I always get the same type of features, which makes me wonder: Is that RX actually something, or is just a lot of noite?

Small packet loss in the beginning of the RX stream

My knowledge is very obsolete. But if I remember correctly there used to be some leftover data buffered from last stream somewhere in USB controller or FPGA. It used to return old 12 packets of I12 data (that would be 16320 samples) at the start of stream. Could be less if PC is slow to initiate USB transfers and they get discarded in hardware. @ignasj this should be checked in firmware

@OCB

Also, is this doable at so low LO frequencies? I understand that the LimeSDR TX/RX are not optimized for such low frequencies, but is it possible to hack the hardware in some sense in order to get some better results? I don’t want to ruin this beauty.

That is affected by the matching networks on the board, so I think for testing purposes you could use chip’s internal RF loopback instead of the cable to have better results.