Hi All,
I'm seeing some odd behavior after upgrading uhd-fpga to Vivado 2017.4. It
appears some of my larger testbenches take a noticeably longer time to
complete the "update_compile_order" command before progressing.
Here's an example (see elapsed time of 10+ minutes, after the
update_compile_or
Hello Konstantin:
I think that the E310 SDK requires a 64-bit OS.
You should be able to build an SDK for a 32-bit machine on a 64-bit machine
using the SDKMACHINE variable. The Yocto manual should have documentation
on this variable.
The post below might also be of interest to you.
http://lists
As a side effect of some paying work, I ended up with a Jenkins job that
builds E300 images from the OpenEmbedded branches for Rocko (dates from
last fall and currently still receiving updates). The kernel is built
from Kurt Kiefer's excellent work
(https://github.com/kekiefer/meta-ettus/tree/rocko
You should use a tune_request_t to manually specify the DSP frequency. The
issue is that only the master (LO source) channel knows about the actual
frequency error in the LO and will automatically use the DDC to compensate
for that error. The other channels must have the same correction applied
man
Hi Derek,
I think I got that. Is the DDC frequency + offset aligned automatically
if I use a timed command for usrp->set_rx_freq()? Or is there some other
command I missed?
Best regards,
Fabian
Am 04.06.2018 um 13:20 schrieb Derek Kozel:
Fabian,
Timed commands, carefully and correctly used
Hi Marcus,Thanks for your reply :)
---Original Message---From:
MarcusMüllerTo: Hojoon Yang
,usrp-users@lists.ettus.comSent date: 2018-06-04
20:37:04 GMT +0900 (Asia/Seoul)Subject: Re: [USRP-users] Complex signal
representation?
Hi Hojoon,
we
Hi Hojoon,
well, the point is that USRPs deal with *complex baseband*, so, of
course, all the samples are complex :)
Q1
So, yeah, this is all due to complex signal representation. To
understand this, there's no way around understanding complex equivalent
baseband, but don't fret, any communicatio
Fabian,
Timed commands, carefully and correctly used along with common 10 MHz and
1PPS, can give you time aligned reception with an accuracy of one sample
clock period. They are used by many projects for this. To have repeatable
phase relationships between channels you must also use timed commands
Hi all,I'm using two B210 USRPs which are connected each other through coaxial
cable with a 30dB attenuator.I generated a simple sinusoidal wave using
MATLAB(i.e. cosine wave, fc=100) and saved it as complex float binary form.The
reason I stored the samples as *complex float" is that there is no
Hello Derek,
thank you very much.
So is it correct, that the timing using the set_comman_time() function
is so precise that I can do MIMO with it? That would be great :)
Best regards,
Fabian
Am 04.06.2018 um 10:52 schrieb Derek Kozel:
Hello Fabien,
Yes, it is possible to queue commands, howe
Hello Fabien,
Yes, it is possible to queue commands, however there are two important
things to keep in mind. The commands will block any other commands in the
same queue from executing until the current one's time is reached. So
commands must be sent in order (100, then 120, 140 ...). Second, the
Yes, that's absolutely possible with one caveat:
These commands end up in queues. So, you need to send them in correct
order, or, for example, if you send the commands for 120, 160 , 140,
then the the 160 command will block the queue and the 140 command will
be executed directly after the 160 comm
Hi,
thanks for the great answer.
One more question: Is it possible to send multiple commands for
different times right after each other? So for example if the current
time is 100, I execute the code you provided for 120, 140 and 160 at
once without waiting for the command at 120 to be executed
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