Maria,
So, if I understand correctly, I have to put there also something like
"self.ettus_rfnoc_rx_radio_0.set_rx_agc(enable,0)" isn't it?
Exactly! Take a look at [1] for the correct syntax.
[1]
https://github.com/EttusResearch/gr-ettus/blob/1038c4ce5135a2803b53554fc4971fe3de747d9a/include/ettus/rfnoc_rx_radio.h#L97
Let me know if that worked out for you.
Cheers,
Julian
On 3/10/21 9:59 AM, Maria Muñoz wrote:
Hi Julian,
Thanks for the quick answer.
I think you might be right about the possible bug turning on the AGC
from GRC. I have checked the flow graph generated and there's no
set_rx_agc enable option (I checked the c++ definition block where this
option did appear but I hadn't look at the python generated).
The lines related to the radio in my flowgraph are these:
/self.ettus_rfnoc_rx_radio_0 = ettus.rfnoc_rx_radio(
self.rfnoc_graph,
uhd.device_addr(''),
-1,
-1)
self.ettus_rfnoc_rx_radio_0.set_rate(samp_rate)
self.ettus_rfnoc_rx_radio_0.set_antenna('RX2', 0)
self.ettus_rfnoc_rx_radio_0.set_frequency(cf, 0)
self.ettus_rfnoc_rx_radio_0.set_gain(gain, 0)
self.ettus_rfnoc_rx_radio_0.set_bandwidth(samp_rate, 0)
self.ettus_rfnoc_rx_radio_0.set_dc_offset(True, 0)
self.ettus_rfnoc_rx_radio_0.set_iq_balance(True, 0)/
So, if I understand correctly, I have to put there also something like
"self.ettus_rfnoc_rx_radio_0.set_rx_agc(enable,0)" isn't it?
Kind Regards,
Maria
El mié, 10 mar 2021 a las 9:16, Julian Arnold (<jul...@elitecoding.org
<mailto:jul...@elitecoding.org>>) escribió:
Maria,
I might not be the right person to answer this, as my experience with
UHD 4.0 is relatively limited at the moment.
However, I cant tell you that the AGC on B2x0 devices is controlled via
software (using set_rx_agc()). There is no need to directly modify the
state of any pins of the FPGA.
I vaguely remember that there was a bug in an earlier version of gr-uhd
(somewhere in 3.7) that made it difficult to turn on the AGC using GRC.
That particular one is fixed in gr-uhd. Not sure about gr-ettus, though.
Maybe try using set_rx_agc() manually in you flow-graph (*.py) and see
if that helps.
Cheers,
Julian
On 3/9/21 5:11 PM, Maria Muñoz via USRP-users wrote:
> Hi all,
>
> I was wondering if it is possible to enable AGC from the RFNoC radio
> block in GNURadio. I use UHD 4.0 version and GNURadio 3.8 with
gr-ettus.
>
> I see that the RFNoC Rx radio block has an enable/disable/default
AGC
> option in the GNURadio block which I assume calls the UHD function
> "set_rx_agc"
>
(https://files.ettus.com/manual/classuhd_1_1usrp_1_1multi__usrp.html#abdab1f6c3775a9071b15c9805f866486)
>
> I have also checked on the FPGA side that there is a pin from
FPGA to
> AD9361 called XCVR_ENA_AGC which is set always to 1 on the top
level of
> the FPGA image (see attached file "e320.v", line 872). This pin,
> according to
>
https://www.analog.com/media/en/technical-documentation/data-sheets/AD9361.pdf
> is the "Manual Control Input for Automatic Gain Control (AGC)".
> Must be this pin set to 0 to have AGC working?
> If not, how can I get AGC working? I've made some tests
> enabling/disabling this option but I do not see any changes
between the
> waveforms received.
>
> Any help would be appreciated.
>
> Kind Regards,
>
> Maria
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com <mailto: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
