[USRP-users] Independent use of ethernet ports on Ettus x310?

Chad Spooner cmspooner at nwra.com
Fri Nov 17 12:28:41 EST 2017


Neel:
But what does Ettus mean by "Dual 1 Gigabit Ethernet" on those links?
(Not "Dual 10 Gigabit Ethernet".)
See attached screen shots from the Ettus.com links I sent previously.
I am currently using the UHD Source block with the SBX and a UHD Sink
block with the WBX in the
working flowgraph. What I want to do is occasionally obtain complex
samples from the SBX and process
them outside of GRC. I can think of two ways to get data from the SBX
to a file. The first is through 
uhd_rx_cfile and the second is through the use of a File Sink in the
flowgraph. But while the flowgraph
is running, I can't successfully call uhd_rx_cfile. If I use the File
Sink, I'll have to be able to grab samples
at irregular intervals outside of GRC, and I'm not sure if that will
cause a problem for the function
that is continuously writing to the file. I'll try. 
Plan B could be to just use a second USRP.
Thanks,
C
On Fri, 2017-11-17 at 09:00 -0800, Neel Pandeya wrote:
> Hello Chad:
> 
> By "dual 10 Gigabit Ethernet", we mean that both Port 0 and Port 1
> are being used with 10 Gigabit Ethernet links simultaneously. Both
> links must connect to the same host computer; you cannot have one
> link connected to system A, and the other link connected to system B.
> 
> In GNU Radio, you can receive from your SBX by using a USRP UHD
> Source block, and you can transmit with your WBX by using a USRP UHD
> Sink block.
> 
> --Neel Pandeya
> 
> 
> 
> On 17 November 2017 at 08:33, Chad Spooner <cmspooner at nwra.com>
> wrote:
> > Neel:
> > 
> > Thanks very much for the helpful reply.
> > 
> > MY x310 has both a SBX and a WBX installed. The working
> > configuration I mentioned 
> > has the WBX transmitting and the SBX receiving simultaneously. But
> > how do I get
> > data chunks from the SBX while the flowgraph that implements this
> > simultaneous
> > operation is running? I suppose I can use a File Sink, but I'm not
> > sure how to read
> > segments of the growing file while it is constantly being written
> > to by the SDR/host.
> > 
> > I think something that confuses me about the Ettus online
> > documentation is the
> > use of the phrases "Dual 1 Gigabit Ethernet" and "Dual 10 Gigabit
> > Ethernet." These
> > both appear, for example, on the following links:
> > 
> > https://www.ettus.com/product/details/X310-KIT
> > https://kb.ettus.com/X300/X310
> > 
> > I thought I understood the "Dual 10 Gigabit Ethernet" from further
> > reading, and that
> > understanding is consistent with what you say below. But then what
> > does Ettus mean
> > by "Dual 1 Gigabit Ethernet"?
> > 
> > Thanks again,
> > 
> > C
> > 
> > On Thu, 2017-11-16 at 17:08 -0800, Neel Pandeya wrote:
> > > Hello Chad:
> > > 
> > > If you are using 1 Gigabit Ethernet, then only one of two SFP
> > > ports in the rear of the X300/X310 can be used. If you have 10
> > > Gigabit Ethernet, then the second SFP port can be used. Please
> > > see the link below. The SFP ports are configured depending on
> > > which FPGA image is being used.
> > > 
> > > http://files.ettus.com/manual/page_usrp_x3x0.html#x3x0_load_fpga_
> > > imgs_fpga_flavours
> > > 
> > > Regarding your use-case, if you have a second daughterboard in
> > > your X300/X310, then you can simultaneously receive in parallel.
> > > With two daughterboards, the X300/X310 provides two transmit
> > > chains and two receive chains.
> > > 
> > > What is the configuration of your system?
> > > 
> > > --Neel Pandeya
> > > 
> > > 
> > > 
> > > On 15 November 2017 at 17:34, Chad Spooner via USRP-users 
> > > sers at lists.ettus.com> wrote:
> > > > All:
> > > > 
> > > > I'm wondering how to use the second ethernet port on my x310.
> > > > I've been going through the
> > > > online Ettus SDR help, but can't seem to find the right pages.
> > > > 
> > > > The short version of my question is: Can I use the two ethernet
> > > > ports independently, say
> > > > when each of them is connected to a separate computer? If so,
> > > > how do I set up the second
> > > > port? I'm using computers with 1 GiG Ethernet only.
> > > > 
> > > > Details/Context: I have a working gnuradio companion flowgraph
> > > > that generates a signal indefinitely 
> > > > and applies it to (A:0, Tx/Rx). That output port is connected
> > > > by a cable to (B:0, RX2).  All indications are 
> > > > that this is working well. At irregular intervals, I want to
> > > > obtain large numbers of samples from
> > > > (B:0, RX2) by calling, say, uhd_rx_cfile or the like, outside
> > > > of the flowgraph, which is still
> > > > running. I'm prevented from doing that while the flowgraph is
> > > > running. Can I do it using the
> > > > second 1 GiG port if I set it up properly?
> > > > 
> > > > Thanks for any advice you can offer.
> > > > 
> > > > Chad
> > > > 
> > > > -- 
> > > > Chad M. Spooner
> > > > NorthWest Research Associates
> > > > 301 Webster Street
> > > > Monterey, CA 93940
> > > > cmspooner at nwra.com
> > > > 831 582 4904
> > > > cyclostationary.blog
> > > > 
> > > > _______________________________________________
> > > > USRP-users mailing list
> > > > USRP-users at lists.ettus.com
> > > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.
> > > > com
> > > > 
> > -- 
> > Chad M. Spooner
> > NorthWest Research Associates
> > 301 Webster Street
> > Monterey, CA 93940
> > cmspooner at nwra.com
> > 831 582 4904
> > cyclostationary.blog
> > 
-- 
Chad M. Spooner
NorthWest Research Associates
301 Webster Street
Monterey, CA 93940
cmspooner at nwra.com
831 582 4904
cyclostationary.blog

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