This is very interesting. I am trying to set the rx bandwidth on a N321 for a 
while now.

Is there any workaround? Our bandwidth seems stuck at 8MHz while our 
application needs much more.

Thanks

Lorenzo

On Feb 25, 2021, at 10:32 AM, Marcus D. Leech via USRP-users 
<usrp-users@lists.ettus.com> wrote:


On 02/25/2021 11:30 AM, Puertas Blanco, Roberto via USRP-users wrote:
Hello,

I noticed that RX bandwidth is fixed to 100MHz, although the AD9371 datasheet 
specifies an adjustable range of 8 to 100MHz. Why is this parameter fixed?

double magnesium_radio_control_impl::set_rx_bandwidth(
    const double bandwidth, const size_t chan)
{
    std::lock_guard<std::recursive_mutex> l(_set_lock);
    _ad9371->set_bandwidth(bandwidth, chan, RX_DIRECTION);
    // FIXME: setting analog bandwidth on AD9371 take no effect.
    // Remove this warning when ADI can confirm that it works.
    RFNOC_LOG_WARNING("set_rx_bandwidth take no effect on AD9371. "
                     "Default analog bandwidth is 100MHz");
    return AD9371_RX_MAX_BANDWIDTH;
}

Best regards,
Roberto

Because despite what the *datasheet* for the AD9371 says, the published 
interface to change the analog RX bandwidth has no effect.


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