On 07/09/2021 12:05 PM, Huang Wei wrote:
Sorry, I mean it's the underrun problem

Huang Wei <weizar...@gmail.com <mailto:weizar...@gmail.com>> 于2021年7 月9日周五 下午5:02写道:

    Hello everyone,

    I am using the embedded python block in GRC to realize some simple
    functions. All works fine in the GRC local set-up. However, if I
    connect a USRP sink to the flowgraph which includes that python
    block, and set the sample rate more than 20 MHz (I need 100 MHz in
    my case), it will keep output "UUUUUUUU....", and then GRC will
    stop working.
    I tried the defaulted python block, where the output is simply
    multiplied by a factor k, the same overrun problem happened. And
    GRC works fine with the USRP sink if the python block is not used.

    Does anyone know what could be the problem?
    Thank you!

    Regards,
    Wei

Because there's absolutely no way a Python-based work function is ever going to keep up at multi-MSPS rates.


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