Dear Mr. Müller,
Thanks for the script and of course fast response!
We are running in loopback mode (tx to rx), and we have tried to change the tx
and rx gain (attenuation) pairs while keeping a constant link budget in the
loop. We had inconsistent results in terms of ADC dynamic (bits) utilization.
Therefore, we needed a solution that fixes the ADC gain.
Best regards / Mit freundlichen Grüßenrüßen
--
Askar, Ramez, M.Sc.
On 15.02.21, 18:52, "Marcus Müller" <marcus.muel...@ettus.com> wrote:
Dear Mr. Askar,
you can get the detailed names of the available gain elements of every
device by calling
auto gain_names = my_multi_usrp->get_rx_gain_names();
and then do something fun like:
for(const auto& gain_name : gain_names) {
auto gain = my_multi_usrp->get_rx_gain(gain_name);
std::cout << gain_name << ": " << gain << " dB(arbitrary)\n";
}
Setting the gains works just the same,
my_multi_usrp->set_rx_gain(gain_element_name, value).
However, 99.5% of times¹ you *don't* want to set the gain to any element in
isolation; UHD
was coded to choose the most sensible combination of gains distributed
across the settable
gain elements.
There's a relatively new API for *Gain Profiles*: With a call to
my_multi_usrp->get_rx_gain_profile_names() you get a list of available gain
profiles (I
must admit I don't know which ones are supported on CBX-120; you might only
get an empty
list meaning there's but one default profile); you can set them with the
eponymous setter
method.
May I ask what the intention behind wanting to set that individual gain
instead of simply
setting the overall RX gain is? Maybe we can advise to your advantage based
on that.
Best regards,
Marcus Müller
¹ Note that 87.56% of such numbers are totally made up
DISCLAIMER: Any attached Code is provided As Is. It has not been tested or
validated as a
product, for use in a deployed application or system, or for use in
hazardous
environments. You assume all risks for use of the Code. Use of the Code is
subject to
terms of the licenses to the UHD or RFNoC code with which the Code is used.
Standard
licenses to UHD and RFNoC can be found at
https://www.ettus.com/sdr-software/licenses/.
NI will only perform services based on its understanding and condition that
the goods or
services (i) are not for the use in the production or development of any
item produced,
purchased, or ordered by any entity with a footnote 1 designation in the
license
requirement column of Supplement No. 4 to Part 744, U.S. Export
Administration Regulations
and (ii) such a company is not a party to the transaction. If our
understanding is
incorrect, please notify us immediately because a specific authorization
may be required
from the U.S. Commerce Department before the transaction may proceed
further.
On 15.02.21 17:48, Askar, Ramez via USRP-users wrote:
> Dear Sir or Madam,
>
>
>
> We are using the X310 with CBX-120 daughter cards. How can we get and
set the digital
> RX gain (ads62p48 gain) from C++ application?
>
>
>
>
>
> Best regards / Mit freundlichen Grüßen
>
> --
> Askar, Ramez, M.Sc.
> Research Associate / Project Manager / Delegate
>
> Wireless Communications and Networks
> Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute, HHI
> Einsteinufer 37, 10587 Berlin, Germany
> +49 (0)30 31002-628
> ramez.as...@hhi.fraunhofer.de <mailto:ramez.as...@hhi.fraunhofer.de>
> www.hhi.fraunhofer.de <http://www.hhi.fraunhofer.de/>
>
>
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
