USRP 2920 with USRP RIO 2942R

[sarhin]

Hello dear NI members;

I am currently preparing my graduation project in Signal Processing that is about implementing Music Algorithms for source localisation in NI Usrp platforms. The architecture as shown in the attached file.So I consider that I have 3 receivers where 2 are in USRP RIO and the third is in USRP2920.

And in order to get a PPS & Ref signals for synchronisation, I am using the USRP RIO 2942R with its PPS out and Ref out connected to the USRP via PPS in and Ref in.

The problem is that when I define both devices USRP RIO and USRP in device names it does not work !!!!!!

You will find attached the vi I've tried but it shows errors.

I actually want to know is it possible to implement hybrid receivers ie; USRP 2920 & USRP RIO 2942R????

I want to know whether the architecture is correct and applicable or not?

I am looking forward getting your comments about my project.

Thanks in advance.

[yass_BER]

Hello sarhin,

i am interested to see the answer as well, very interesting idea ...

[replyall_ia]

Hey Sarhin,

I'm a little confused by what you mean by "in devices name it does not work".

What does it look like in USRP Config Utility? What errors is it throwing? I'm going to need a bit more context when you say that it doesn't work.

Thanks,

Aulia

[sarhin]

Hi Aulia,

First of all, Let me thank you for your kind answer. I really appreciate that.

Actually my problem is that when I define the Ip address of USRP 2920 and the name RIo0 in the device names it occors errors shown in the attached files.

Thanks again.

Have a great day.

[replyall_ia]

Hey Sahrin,

I still don't see any screenshots of what your "USRP Configuration Utility" looks like. Can you take a screenshot of that? There's a mismatch in nomenclature somewhere and I'm not sure where it's throwing that. 

Also, are you running an example program? I would try and run one of those first before trying to make your own code just to make sure that we are getting data from the USRPs.

Thanks,

Aulia

[sarhin]

Hi Aulia,

Thanks again for your kind interset for helping me.

You will find in attached the screenshot of NI USRP configuration utilities.

Yes indeed I tried a progrem example from the NI USRP that you will find attached too.

My aim is to receive data using USRP RIO 2942R and USRP 2920 simultaneously.

Thus I still wonder if this hybride system could work or not so I want to know whether I can implement receivers with diffrent platforms or with just one communication chain as done with the example program.

Thanks a lot.

Sarhin.

[DylanDylanDylan]

Hi sarhin,

You are not able to mix USRP device families in a single session. AKA:

• Works: Single NI-USRP Session with multiple USRP RIO Software Defined Radio's
• Works: Single NI-USRP Session with multiple 1GbE USRP Software Defined Radio
• Does not work: Single NI-USRP Session with multiple USB USRP Software Defined Radio (the USB devices do not support this)
• Does not work: Single NI-USRP Session mixing a USRP RIO Software Defined Radio and either 1GbE/USB USRP Software Defined Radio

You will need to create 2 different NI-USRP Sessions and ensure they are sharing a common reference + pps.

What type of synchronization level are you attempting to achieve as there are caveat's when synchronizing across USRP device families.