Actually, i tried it. But i guess minimum sample rate is 1Ms/s, when i set less than it, it gives this warning on transmitter side;

[WARNING] [MULTI_USRP] The hardware does not support the requested TX sample rate:

Target sample rate: 0.500000 MSps

Actual sample rate: 1.000000 MSps


When i set 500Ks/s, transmitter again gives 'U's but receiver does not. I guess receiver can be set to lower sample rates, but transmitter not. Do you know any way to work transmitter on lower rates?


On 4.04.2019 15:57, Malik Saad wrote:
Just use sampling rate lesser than the existing mode.

On Thursday, April 4, 2019, Ramazan Çetin via USRP-users <[email protected] <mailto:[email protected]>> wrote:

    Hello all,

    I am trying to implement OFDM transceiver on E310. Lastly, i
    already implemented OFDM on N310 (in network mode connected to
    computer) using GNURadio blocks. But when i run same example
    (*ofdm_rx_tx_hier_blocks.grc)* on E310 it gives 'U' and 'O's.
    Processor cannot handle incoming and outgoing data.

    Then, i put OFDM transmit block to one E310 and OFDM receive to
    anther to decrease load on processor. Again, transmitter gives 'U'
    and receiver gives 'O's. Receiver also gives that info:

    INFO: Detected an invalid packet at item

    INFO: Parser returned #f


    So, it cannot decode OFDM header. I guess packets are corrupted
    because of bad transmission.

    I know that, processor cannot handle that much data. I should go
    to FPGA and RFNoC. But in here, available OFDM implementation in
    RFNoC using GNURadio is not fit into FPGA (i can put 3 RFNoC blocks).

    So should i implement my own OFDM implementation on FPGA?

    Or, can you please suggest another way to implement OFDM
    Transceiver on E310?


    Best regards.

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