On 2022-05-05 16:07, Peter Featherstone wrote:
Hi Marcus and thank you for your response.
What about the B210? I'm getting similar behavior with this device
too, i.e. I cannot set different frequencies on each channel.
This document
(https://kb.ettus.com/B200/B210/B200mini/B205mini#Frontend_Specifications)
says the following:
"On the B210, both transmit and receive can be used in a MIMO
configuration. For the MIMO case on the B210 only, both receive
frontends share the RX LO, and both transmit frontends share the TX
LO. Each LO is independently tunable between 50 MHz and 6 GHz and can
be used with 1 or 2 channels
Does this imply that in a non-MIMO setting, both RX channels can have
their own LO and therefore tune to different frequencies?
NO, it's just awkwardly worded.
The E310 and B210 share the same AD9361 RF front-end chip, and there
really absolutely is only A SINGLE LO for each direction (TX and RX).
Many thanks,
Peter
On 05/05/2022 16:31, Marcus D. Leech wrote:
On 2022-05-05 10:18, Peter Featherstone wrote:
Hi all,
Some help would be great.
I have an E320 and would like to capture IQ samples on 2 different
channels at different frequencies.
Is this possible?
The short answer is "no" -- because there's only 1 RF LO for each of
TX and RX -- that's how the AD9361 chip
does MIMO.
The longer answer is that if your two frequencies are within the
analog bandwidth of the AD9361, you can do some
DDC tricks to bring them both down to baseband before presentation
to the host. In your case, this isn't possible, since
the "split" is over 1GHz.
When I run the following:
usrp->set_rx_freq(2.1e9, 0);
printf("Channel 0 freq %f\n", usrp->get_rx_freq(0));
printf("Channel 1 freq %f\n", usrp->get_rx_freq(1));
usrp->set_rx_freq(3.2e9, 1);
printf("Channel 0 freq %f\n", usrp->get_rx_freq(0));
printf("Channel 1 freq %f\n", usrp->get_rx_freq(1));
I get:
Channel 0 freq 2.1e9
Channel 1 freq 2.1e9
Channel 0 freq 3.2e9
Channel 1 freq 3.2e9
Do you have to configure the channels or something?
Thanks,
Pete
_______________________________________________
USRP-users mailing list -- [email protected]
To unsubscribe send an email to [email protected]
_______________________________________________
USRP-users mailing list -- [email protected]
To unsubscribe send an email to [email protected]
_______________________________________________
USRP-users mailing list [email protected]
To unsubscribe send an email [email protected]
_______________________________________________
USRP-users mailing list -- [email protected]
To unsubscribe send an email to [email protected]
