See here for the schematics which will help you find the full specs for the AUX ADC and DAC.
https://files.ettus.com/schematics/n200/ Yes you can certainly modify the FPGA and UHD to support these. But you’ll mostly be on your own. Sent from my iPhone > On Mar 4, 2022, at 9:35 AM, Fabien PELLET <fpellet.f4...@free.fr> wrote: > > Yes, sorry indeed I was talking about AUX_DAC and AUX_ADC that are > replicated from the motherboard. > > I already use IO which works very well. So there is no way to send samples > (or receive) at a specific sample rate using that AUX_DAC or ADC. It is just > some "analog IOs" for reading some external sensors for example if I > understand well what you wrote. > > What are the specifications of that AUX ? > > Using a specifique FPGA firmware and custom UHD library, would it be possible > to transform them as GR source or sink ? > > Thanks, > > Best regards, > > Fabien, F4CTZ. > >> Le 04/03/2022 à 14:35, Marcus Müller a écrit : >> Sorry, hit "send" accidentally: >> >> Dear Fabien, >> >> there's no ADC on these daughterboards. Just an EEPROM for identification, >> opamps for amplification and signal conditioning, and on the LFTX a >> switch-mode power supply. You're right, they do exppose the AUX DACs and ADC >> lines from the motherboad. >> >> However, these are without further ado not accessible from UHD, and thus >> also not from GNU Radio. Some daughterboard drivers use them. >> >> I'm not sure UHD exposes them in all version, but `uhd_usrp_probe --tree` >> might show properties called "AUX_DAC_A" (or _B, or AUX_ADC_.., you get the >> idea). You can use get_device() on your USRP blocks and access theses >> properties from your GNU Radio program (from C++), but it's not really an >> API – more an exposing of intestines... >> >> Best regards, >> Marcus >> >>> On 04.03.22 14:30, Marcus Müller wrote: >>> Dear Fabien, >>> >>> there's no ADC on these daughterboards. Just an EEPROM for identification, >>> opamps for amplification and signal conditioning, and on the LFTX a >>> switch-mode power supply. >>> >>> Best regards, >>> Marcus >>> >>> On 04.03.22 10:30, Fabien PELLET wrote: >>>> Hello, >>>> >>>> As there are IOs available on LFTX and LFRX, there are also ADC and DAC >>>> available. >>>> >>>> Is there a way to use them as SOURCE and SINK in gnuradio for low speed >>>> conversion ? >>>> >>>> Thanks, >>>> >>>> Best regards, >>>> >>>> Fabien, F4CTZ. >>>> >>>> >> >
