Hello Michael,
Sorry for the long delay of my answer:
I just want to confirm that the reported issues are fixed with the N310 and
UHD 3.13.1.0.
Thanks!
Serge
On Fri, 4 Jan 2019 at 16:00, Michael West wrote:
> Hi Serge,
>
> I have tried to reproduce the issue on an N310 and X310 with no succ
Hi Serge,
I have tried to reproduce the issue on an N310 and X310 with no success. I
tried several versions of UHD (including v3.13.1.0-rc1) on both and the
time alignment was always good and the benchmark_rate with the increased
INIT_DEALY always worked as expected. Can you try with the head of
Hi Serge,
Thank you for making us aware of the issues. We are looking into them and
consider them a priority. We will let you know what we find.
Regards,
Michael
On Fri, Nov 9, 2018 at 11:04 AM Serge Malo via USRP-users <
usrp-users@lists.ettus.com> wrote:
> Hi all,
>
> I have made another te
Hi all,
I have made another test today, I want to report the results here.
*Issue #1*
I have modified the tx_timed_samples example, simply such that it transmits
on both channels of the X300.
Using a frequency of 1.57542GHz for both channels, I was able to measure on
a scope a time offset of 320n
On 11/08/2018 03:13 PM, Serge Malo via USRP-users wrote:
Hi all,
Thanks for the extra comments Mark.
Just to be clear: I'm not talking about phase offset between RF
Outputs, but only time offset.
(Once time offset is fixed, we will try to have phase-coherent RF
outputs).
I have made other m
Hi all,
Thanks for the extra comments Mark.
Just to be clear: I'm not talking about phase offset between RF Outputs,
but only time offset.
(Once time offset is fixed, we will try to have phase-coherent RF outputs).
I have made other measurements today, here are the results.
I'm transmitting a si
Here's a google drive link with images of the phase drift between rx4 and
tx 1&2, and tx 3&4
https://drive.google.com/open?id=1Bg6F0WHzzwVhpFBlrlfqJgpGg9JtTczH
On Thu, Nov 8, 2018 at 11:32 AM Mark Wagner wrote:
> Hi guys,
>
> Maybe I could jump in and share some related results. My group has be
Hi guys,
Maybe I could jump in and share some related results. My group has been
developing a MIMO system with N310 units. We did a test sounding recently
where we sent 4, length 4096, orthogonal multitone signals from the
transmitters to the receivers and processed the data by finding the channel
Hi Serge,
Are you measuring the phase offset between the TX0 and TX2 signals in a
steady-state case, or the time difference in the start of those signals?
In the former case, your results could be impacted by the lack of internal
LO sharing between daughterboards. I would fully expect an unknown
Your time offset is in line with the time offset we are seeing in our
N310's. I think this is because TX 0, 1 is on one RF chain (with its own
local oscillator) while TX 2, 3 is on its own RF chain with a separate LO.
As far as time delay or how long it takes for the RF components to warm up
TX 0,
Yes: we are using UHD 3.13.1.0 RC1, with the latest file system image
I can try to use lower tx start times to see if the time offset changes
with that.
Thanks,
Serge
On Wed, 7 Nov 2018 at 21:44, Marcus D. Leech
wrote:
> On 11/07/2018 09:31 PM, Serge Malo wrote:
>
> Yes:
> We only use one stre
On 11/07/2018 09:31 PM, Serge Malo wrote:
Yes:
We only use one streamer for all RF outputs, and send time_spec with
each call to the streamer's send method.
We reset the internal time with set_time_unkown_pps(0), and program
the first samples to be streamed at a time of 0.800s.
It is basically
Yes:
We only use one streamer for all RF outputs, and send time_spec with each
call to the streamer's send method.
We reset the internal time with set_time_unkown_pps(0), and program the
first samples to be streamed at a time of 0.800s.
It is basically the same code we used on the X300/X310.
Thank
On 11/07/2018 08:53 PM, Serge Malo via USRP-users wrote:
Hi all,
We are trying to send 4 synchronous signals from the 4 Tx ports of the
N310.
We are using UHD 3.13.1.0 RC1 under Ubuntu.
Central Freq = 1575.42 GHz and 1227.6 MHz
Master Clock rate = 153.6 MHz
We would expect to have less than 3
14 matches
Mail list logo
