Hey Wan, On Thu, Oct 27, 2022 at 10:53 PM Wan Liu <wan.liu@ettus.com> wrote: > Hello Brian, > > I set up my HW and SW, but I'm having some trouble reproducing after some > initial playing around with UHD examples and gnuradio. I assume you have > some UHD program that records RX to file and while you repeated make tune > requests to ch 1, is this correct? To make sure we are on the same page, > you provide a sample program that reproduces your steps for tuning and > recording the IQ samples. > > You also mentioned " When trying to read the lo_locked sensor > continuously, generating SPI traffic I presume going to the PLLs, I get > clean spectrum." Can you also show in your sample program how to reproduce > these steps > > Once I can get the same spectrogram as you, I'll also look into the "mute > till lock detect" feature of the ADF5356. > Attached is a file which should reproduce it for you. If it doesn't, let me know off list and we can work from there. It uses a scanning channel to go through a list of frequencies, and will continuously read from the other channel. When you hit ENTER, it will save off a buffers worth of samples to disk with increasing filenames (i.e. buffer-000.dat, buffer001.dat, etc.). Quit the program by hitting Ctrl+C. I set it up to save off 10ms of samples but it should be pretty easy to change that to some arbitrary length. I tried to make it so no overflows would occur. Source is attached and has a comment showing how I compiled on my system. Source is also here, along with a picture of the birdies I am seeing: https://drive.google.com/file/d/1Hrf15GzaO2hAlorUMkt4XT5hjv0J4tCc/view?usp=sharing https://drive.google.com/file/d/1loVoixWgDPwo-QHPtNF6ZvHJMMS1kyVI/view?usp=sharing You can also just generate SPI traffic, I imagine, if you only keep the call to usrp->get_rx_sensor() in the main loop and nothing else. Let me know if you are able to reproduce this issue or not. Thanks, Brian >