Re: N210 DAC and ADC usage

[Marcus Müller]

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.