On 08/08/2017 12:38 AM, Jose Ruvalcaba via USRP-users wrote:
Hello,
I was wondering if someone could shine some light on when would
someone use an OctoClock or a GPSDO on say a USRP B210. Would I need
an OctoClock if I am connecting 2 USRP's that are talking to each
other? Would I need a GPSD
Hello,
I was wondering if someone could shine some light on when would someone use
an OctoClock or a GPSDO on say a USRP B210. Would I need an OctoClock if I
am connecting 2 USRP's that are talking to each other? Would I need a GPSDO
if I am just using a single USRP B210?
Regards,
Jose
__
HI all,
We run command uhd_usrp_probe,output as below:
-- X300 initialization sequence...
-- Determining maximum frame size... 1472 bytes.
-- Setup basic communication...
-- Loading values from EEPROM...
-- Setup RF frontend clocking...
-- Radio 1x clock:200
-- [DMA FIFO] Running BIST for FIFO 0..
Hello Derek,
I tried out what was said below on the thread with a 5V high 0V low square wave
with a 20% duty cycle inputted into the sync port of the USRPs. I used the
follow code to sync them up:
if (not time_source.empty()) usrp->set_time_source(time_source);
//set the time at an unknown
Hi Nathan,
we believe you are right. Nice catch! The line you suggested as culprit is
already corrected and merged and will be pushed public in the near future.
Thanks!
-N
On Mon, Aug 7, 2017 at 5:07 PM, Perelman, Nathan <
nperel...@lgsinnovations.com> wrote:
> Using the HG image I am seeing a
Hi,
I'm building an application where I receive data from the x310, process the
data, then transmit it out. I have 3 separate threads running, one for each
task. The receive task is constantly receiving data from the x310 at 200MS/s
and putting it into a buffer. The process task takes data fro
Hello,
I have my USRP X310 connected through Ethernet cable into eth1 port on a
dell desktop with the following information
Ubuntu 14.04 64 bit ,
Intel Core i7-377 CPU @ 3.4GHz x 8
Git version 1.9.1
Kernel version 3.19.0-61-lowlatency
My computer is having a problem recognizing my USRP X310 and
Dear Konstantin,
> Could the issue be that the ehternet cable that is in the unit is not
> a crossover cable.
no, that is usually not the case. If you're getting as far as being
asked for a password, your SSH client is connecting to /something/. So,
we can rule low-level network out.
Best regards
Dekek,
Could the issue be that the ehternet cable that is in the unit is not a
crossover cable.. Again, I am connecting the laptop ehternet NIC card directly
to the E310… I am assuming I need a crossover cable since I am hooking this up
without going through a router that automatically assign
Hi Masoud,
no, the B2xx series is not capable of being grouped in multi_usrps.
Best regards,
Marcus
On 08/07/2017 04:56 PM, Masoud Naderpour via USRP-users wrote:
> Hi,
> Is it possible to boost the number of MIMO channels of B210 by adding
> multiple USRP B210 devices to the same host?
>
>
>
Thanks for the response…
I just called Best Buy and they confused me. They stated you cannot write
‘files’ to USB SD micro card reader…
I am assuming doing the image is not the same as writing ‘files’…. it is a form
of reformatting, so it can be done.
I will go buy one now….
Till my next e-ma
Hello,
Yes, a micro SD card adapter is needed. I'm going to add to our
documentation to highlight that point. There is no way to overwrite the
entire SD remotely. This is true for nearly every embedded system.
We do not have any recommended micro SD card adapter. There are many from
good brands s
Hello Jorge,
The Octoclock is sold in two versions, one with an internal GPSDO and one
that requires an external source.
The X310 and X300 both do not support daisy chaining. There are a few
issues with it, one of the key ones being propagation delay. If the 1PPS
signal was passed from one unit t
Again… This was not explained clearly….
Are you stating I need a micro SD Card adapter/burner to do this?
I thought I just leave it hooked up to the E310 with the SD card in it and this
can be done?
Please clarify… And if I do need a burner, which one do you suggest I buy…
Thanks….
From: D
Hi Konstantin,
We have no way of knowing what device the SD Card will enumerate as. There
are many guides online for using utilities like fdisk and dmesg to find the
name of the device.
Using Windows or Linux you will need to remove the micro SD card and use a
USB to micro SD card adapter to moun
Hi Nicolas,
Thank you very much for your quick response.
Regarding variable packet sizes the output of my block is going straight to the
host side and I am not planning these to connect to other blocks. In this case
do you see any issue? Will uhd and gnuradio cope with that or will I have
issues
OK... I could not wait.. I tried both...
Btw, I had to install the dd utility too All these intermediate steps
would of have been nice to have listed for novice users...
Anyway, I tried the mmcblck0 directory for my E310 and it didi transfer the
files over
Now, I am assuming I sh
Nate,
I was unsuccessful with the Windows approach mainly that the file downloaded is
a tar
When trying to use the Win32Image software, it did not find the drive to
connect when I had the E310 hooked up via ethernet... Even though I was able
to ping to it through the NIC card.
So, I cam
Hello Dario,
We are creating a RFNoC block that inputs a continuous flow of data and
> needs to output an irregular burst of variable length.
>
> I tried to research a bit but didn’t found a final answer on the following
> questions:
>
>1. Packets to and from RFNoC blocks need to have a min/m
Using the HG image I am seeing a rate greater than 1 billion bytes/second even
when connected via 1G (see below). This is with UHD 3.10.1.1. I had missed the
part where it does set the rate to the 1 Gig constant in the current code.
Looking at the code I think this line might be wrong?
https://
Hey,
it would be good if you could give a little bit more information.
How does your initialization look like?
How does your stream command look like?
Cheers,
On 08/07/2017 04:30 PM, Snehasish Kar wrote:
>
> Hey
>
> Thanks that worked, there was problem in
> initializing stream_args_rx.channels
Hi,
Is it possible to boost the number of MIMO channels of B210 by adding
multiple USRP B210 devices to the same host?
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Hey
Thanks that worked, there was problem in initializing stream_args_rx.channels
Now a new error is popping up. Can you please help with that.
UHD Error:
The receive packet handler failed to time-align packets.
1002 received packets were processed by the handler.
However, a times
Hi all
I’d like to build up 8X8 MIMO system using 4 USRP X310.
To synchronize time&freq. between all of them, I used to use a function
generator to feed both 1 PPS and 10 MHz reference clock to them.
Today, I got an Octoclock which I thought it is able to provide both
synchronization signal, b
Hi,
We are creating a RFNoC block that inputs a continuous flow of data and needs
to output an irregular burst of variable length.
I tried to research a bit but didn't found a final answer on the following
questions:
1. Packets to and from RFNoC blocks need to have a min/max/fixed length?
Ap
Thanks for the advice Derek…
I took the Windows approach as you suggested…
I did download the tar file and unzipped it via Win7. But the extension on it
was .direct… nit .img… So, I altered it… Do not know if this is correct…
Then when I used win32diskmanager, there were no choices in the dr
Hey,
how do you initialize your usrp and the streamer?
Do you specify two channels when creating the streamer? E.g.:
uhd::stream_args_t stream_args_rx("fc32", "sc16");
stream_args_rx.channels = {0ul,1ul};
this->rx_streamer = this->usrp->get_rx_stream(stream_args_rx);
Cheers,
On 08/07/2017 01:52
But when I am setting so, I see only the LED of one daughter board glowing. So
it still receiving data from one daughter board. Please help me with it.
BR
Snehasish
From: Julian Arnold
Sent: Monday, August 7, 2017 4:46:14 PM
To: Snehasish Kar; usrp-users@lists
Hello Nathan,
I think you are referring only to the values that are set in the creation
of the "max_link_branch" of the property tree. In one version of the code
(the one you highlighted at [1]) has only the branch called "link_max_rate"
and this one is created and set to either the PCIE max rate
Hey Snehasish,
it should be A:0 B:0 instead of 0:A 0:B.
E.g.: usrp->set_rx_subdev_spec(uhd::usrp::subdev_spec_t("A:0 B:0"));
Cheers,
Julian
On 08/07/2017 12:39 PM, Snehasish Kar via USRP-users wrote:
>
> Hello
>
>
> I tried setting subdev to subdev("0:A 0:B") as described in the
> example "rx_mu
Hello
I tried setting subdev to subdev("0:A 0:B") as described in the example
"rx_multi_samples" . But its giving me an error saying Invalid daughter-board
frontend name : A. I am using NI USRP 2954R.
Please help me with it.
BR
Snehasish
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