I am trying to receive on both the channels of the LimeSDR and am using a USRP Source block in GNURadio with number of channels set to 2, as suggested above. I also understand the limitation of the board in that the two receive frequencies cannot be more than 60 MHz or so apart. My flowgraph in GNURadio is below:
But the two FFT sinks capture the signal for CH1 rather than their respective channel freqs, even after trying with low pass filter blocks in between. Interestingly, this works even if I remove the antennas connected to either channel, which means there definitely is an issue somewhere with the source block.
I also tried the same in Pothos Flow using the supported SoapySDR source block, as shown:
But, alas, same result. Not sure if this source block is also correctly implemented to support the multiple input feature of LimeSDR.
I then went into LimeSuite and checked the “Enable MIMO” checkbox at the top of the interface and kept the configuration to its default settings, but still no luck. Anyone got any solution for this? If it’s LimeSuite related, a walkthrough of the steps needed to configure the suite properly for multiple Rx on LimeSDR to work would be great, or even the .ini file itself. Thanks in advance.