On 09/05/2020 08:59 AM, Ofer Saferman via USRP-users wrote:
Hello,
I am just starting out with the USRP E310 so bare with me.
I am trying to capture samples to file using: ./rx_samples_to_file
--freq 2.4e9 --rate 40e6 --bw 40e6 --gain 30 --nsamps 1000000 --file
samp4.dat
I get the following two warnings during processing:
------------------------------------------------------------------------------------------------------
[WARNING] [RFNOC] [legacy_compat] No FIFO detected. Higher transmit
rates may encounter errors.
------------------------------------------------------------------------------------------------------
Setting RX Rate: 40.000000 Msps...
[WARNING] [MULTI_USRP] The hardware does not support the requested RX
sample rate:
Target sample rate: 40.000000 MSps
Actual sample rate: 16.000000 MSps
------------------------------------------------------------------------------------------------------
Are the warnings related?
I tried various combinations of number of samples bandwidths and
sample rates and can't get more than 16 Msps.
Why can't I get a sample rate of more than 16 MSps?
Any help will be appreciated.
I am running UHD v3.15.0.0_e310_sg3.
Thanks,
Ofer Saferman
The E310 simply cannot support sample rates that high through the ARM
processor on the device. The CPU operates at less than 1GHz, and
it's an ARM device.
Further, trying to write to files on the SD card at that rate won't
work, either.
The intention on the E310 is that high-speed processing is done in the
FPGA, with lower sample-rates being handled by the ARM CPU that is
built in to the Zynq FPGA.
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
