Hello,
I'm trying to tune the TX channel on the N321 to import the LO from the RX 
channel. I'm on ununtu server 18.04 and UHD 3.15.
The command I'm using are:

On the RX side:
uhd::tune_request_t tune_request(2e9);
tune_request.args = uhd::device_addr_t("mode_n=integer");
my_usrp->set_rx_freq(tune_request,0);
my_usrp->set_rx_lo_export_enabled(true, "lo1", 0);
my_usrp->get_device()->get_tree()->access<bool>("mboards/0/dboards/A/rx_frontends/0/los/lo1/lo_distribution/LO_OUT_3/export").set(true);
 // I want to export on port 3

On the TX side:
main_usrp->set_rx_lo_source("external", "lo1", 0);

The output port led of the LO lights up correctly however the input LO port led 
does not light up and the channel is not tuned (I don't get any signal.)

What am I doing wrong?

Thanks,
Lorenzo

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