Muliple USRP RIO 2943R, synchronization and phase-locking problem

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• Problem of generation of Sync trigger in several synchronization USRP RIO 2943R problem

  Generation problem shutter Sync in several synchronization USRP RIO 2943R problem.

  Previous SR you may already know I'm stacked in USRP RIO multiple synchronization problem, especially in the mode based on the signal. Now I can cut down, the problem is mainly due to the outbreak of sync signals generation.

  First of all, I read the article and the discussion in the following two links:
  http://forums.NI.com/T5/USRP-software-radio/how-to-synchronize-multiple-USRP-Rio-294x-devices/TD-p/3...
  http://zone.NI.com/reference/en-XX/help/373380D-01/usrphelp/synchronization/

  and I did my connection of the material according to the suggestions in the second link. My system schematic is shown in the following image:

  

  I checked OctColck and SMU 6674 T connections. They are all connected correctly and the cable are fine. I use the niUsrpRio200_XcvrSyncPps.lvbitx.
  According to the description of documents and discussion forum, the USRP RIO 1st in the list of devices are considered to be the USRP Master. Then, the FPGA to master USRP RIO released "trigger of sync" signal through the 'PPS Trigger Out' SMA port in RIO USRP box.
  Based on the my analysis of the system, the first impression I have is the USRP Master does not export the 'sync trigger' correctly. The host VI reports the error like this:

  

  I was trying to measure the "synchronization trigger" using oscilloscope, but I found that it is impossible, because the host VI can not yet run, so there is that no signal can be seen from port 'PPS Trigger OUT.
  So I think that if I can watch this signal "sync trigger" in home VI by importing this signal from FPGA to host VI. I did some changes on the FPGA VI as shown in the following image to watch this signal of façade of the host VI. but not so successful. the rx.start tragger relaxation and tx.start do not appear on the host vi read/write control function.

  

  

  
  

• USRP RIO as BS and EU

  Is it possible to use USRP RIO for BS and EU side? Several USRP Siu can connect to NBS?

  Hi varugantigopal,

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  Hello

  I used 2 USRP in reception. They are connected together via a cable Mimo.

  I want to locate the source of the issuer. So I need to synchronize the two receivers.

  I did the constellation to the two USRP:

  1 - with identical cables 2 - with different cables.

  (figure: attached files)

  I have synced my receivers (in time and phase)?

  Please help me

  Best regards

  
  

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  Hello world

  We use NI USRP RIO 2953R with LabView 32bits. We are trying to run the example, the VI "niUSRP EX Rx Async.vi continues", but it returns an error in the GUI.

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  Rui

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  1. make sure that "Update Needed" message persists even after reboot of the device and and re-enumeration of the device by using the utility of Configuration of NOR-USRP.

  2. If the message persists, go to the tab 'Image Updater'.

  3 and select the device that you want to update the image on. Once you select the device that the path of the image will be automatically updated. If it does not go through this path of the image: "C:\Program Files (x 86) \National»

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  Thank you.

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