Hi Altug, Yes, that’s it, with the extension that for all frequencies that fall into other Nyquist zones than zone 1 we use the mix mode as you can see here: https://github.com/EttusResearch/uhd/blob/master/mpm/lib/rfdc/rfdc_ctrl.cpp#L528-L544
/Martin INTERNAL - NI CONFIDENTIAL From: Kaya, Altug <altug.k...@hhi.fraunhofer.de> Sent: Tuesday, July 23, 2024 11:52 AM To: martin.br...@ettus.com Cc: usrp-users@lists.ettus.com Subject: [USRP-users] Re: X440 RF-DAC Distortions You don't often get email from altug.k...@hhi.fraunhofer.de<mailto:altug.k...@hhi.fraunhofer.de>. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> Hi Martin, Thank you for replying. Is this what you are mentioning: * If the chosen center frequency falls into Nyquist Zone 1 according to the given RFDC, the UHD chooses RF-DAC Normal Mode. * If the chosen center frequency falls into Nyquist Zone 2 according to the given RFDC, the UHD chooses RF-DAC Mix Mode. Thank you for the clarification. Best regards, Altug From: Martin Braun <martin.br...@ettus.com<mailto:martin.br...@ettus.com>> Sent: Tuesday, July 23, 2024 11:41 AM To: Kaya, Altug <altug.k...@hhi.fraunhofer.de<mailto:altug.k...@hhi.fraunhofer.de>> Cc: usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> Subject: Re: [USRP-users] X440 RF-DAC Distortions It depends on the frequency you chose. UHD will switch between modes based on the center frequency you choose (and the DAC rate). --M On Mon, Jul 22, 2024 at 6:13 PM Kaya, Altug <altug.k...@hhi.fraunhofer.de<mailto:altug.k...@hhi.fraunhofer.de>> wrote: Dear USRP Mailing List Members, I would like to design a RF Front-End for the X440. I will limit the operations of the receiver part to Nyquist Zone 1&2 by bandpass filters and converter rate selection. However, I got confused in the transmitter side as I couldn’t determine which RF-DAC mode (https://docs.amd.com/r/en-US/pg269-rf-data-converter/RF-DAC-Nyquist-Zone-Operation) do the UHD examples use? If they are using Normal Mode, I will design IF stages according to Nyquist Zone 1. If they are using Mix-Mode, I will design them according to Nyquist Zone 2. Is it possible to know which RF-DAC Mode do the UHD examples (https://github.com/EttusResearch/uhd/tree/master/host/examples) use without programming the FPGA by Vivado IDE? I am planning to use the example called “rfnoc_replay_samples_from_file”, however, I am asking the question for the general use as well. Thank you for your time and effort. Best regards, Altug KAYA _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> To unsubscribe send an email to usrp-users-le...@lists.ettus.com<mailto:usrp-users-le...@lists.ettus.com> National Instruments Dresden GmbH; Geschäftsführer (Managing Directors): Sabrina Gilman, Kathleen Heard Spurck, Carl Schumacher; Sitz (Registered Office): Dresden; HRB (Commercial Register No.): 22081; Registergericht (Registration Court): Dresden This email and any attachments are intended only for the person to whom this email is addressed and may contain confidential and/or privileged information. If you received this email in error, please do not disclose the contents to anyone, but notify the sender by return email and delete this email (and any attachments) from your system.
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