I have a generic RFNoC block that I created and it receives only, and it can be configured as a 2x2 or 1x1 I/O mode. In GnuRadio I have also paired this 2x2 or 1x1 RX block with a TX block, the gr-ettus RFNOC Siggen, which just outputs a sine tone. When I have my RX block configured as 1x1, the TX signal power is well above -20 dBm, but if I configure my RX block as 2x2, the TX signal is greatly attenuated, about -60dBm max.
Why is this happening and is the E310 the limiting factor? Is 2 Rx streams plus the Tx out too much for the Zynq 7020 Artix FPGA? Thanks, Andrew
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