On 11/20/2016 01:49 PM, Damindra Bandara wrote:
Dear Marcus,
Thank you very much for the quick response.
Is it possible for you to give me some more details about what I
should do to transmit and receive multiple channels using N210+WBX?
Regards,
Damindra
Well, the N210+WBX has only enough hardware for a single analog TX
channel. If you carriers are close enough in frequency that they
can be encompassed in a digital baseband bandwidth the fits your
application, then this becomes more of a "how do I mux multiple
baseband carriers on the DSP side", in which case, this is MUCH more
appropriate for the discuss-gnuradio mailing list, and not here.
I have taken the liberty of cross-posting this reply to the
discuss-gnuradio mailing list, which I encourage you to subscribe to.
On Sun, Nov 20, 2016 at 1:44 PM, Marcus D. Leech via USRP-users
<[email protected] <mailto:[email protected]>> wrote:
On 11/20/2016 01:37 PM, Damindra Bandara via USRP-users wrote:
Hi,
I am trying to implement a multi channel transmitter and a
receiver using GNURadio+ Ettus USRP N210+WBX board. Initially I
developed a simple transmitter with two transmit channels. In
USRP sink block I choose the number of channels to 2 and set the
specifications for the two channels. When I try to run the
flowgraph I got the following error.
RuntimeError: LookupError: IndexError: multi_usrp: TX channel 1
out of range for configured TX front ends
When I searched this online, I read that it is a problem with
the subdev specifications. I tried to set the subdev
specifications to [A:AB]. However it gave the following error.
A:AB is not a valid tx subdevice specification on mboard 0.
possible values are: [A:0].
I appreciate if you could give me some guidance to solve this
problem. Print screen of the flowgraph is attached herewith.
Thank you,
Damindra
--
Damindra Savithri Bandara,
Ph.D. in Information Technology (Candidate)
George Mason University,
Fairfax,
Virginia
A single N210 + WBX only has a single TX channel, so your
configuration cannot work as-is.
Further, the lowest possible sample rate of an N210 is 100e6/512
== 195312.5 SPS. So, you'll have to re-sample your baseband stream as
appropriate.
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--
Damindra Savithri Bandara,
Ph.D. in Information Technology (Candidate)
George Mason University,
Fairfax,
Virginia
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