Hello Niels,
Thanks a lot for your reply. I just tried your suggestion, and it worked as
mint! In the 1st run, ADC self cal was run once;in the 2nd and the following
runs, self cal was skipped completely! superb! that is what I want :)
Really appreciate your help.
Kind regards,H
On Thursday
Hello Community,
I have two X410s with UHD 4.5. They are sync with an OctoClock, so I am using
external clock and time.The problem is that whenever I start a test, X410s do
ADC self calibration twice, in the 1st time, they calibrate with internal
clock, and the 2nd time is due to my configurati
__GUID-B1D08221-A553-4A47-805A-896B34C98C07
If the max input signal power is -15dBm, the difference between X310 and X410
is too big.
Any further inputs will be appreciated.
On Monday 31 March 2025 at 16:59:11 BST, Marcus D. Leech
wrote:
On 31/03/2025 11:51, zhou via USRP-users wrote:
Hi,
What is the max input signal power to RF ports in X310? There is a spec in the
below
link:https://www.ettus.com/wp-content/uploads/2024/01/X300_X310_Spec_Sheet_2024-01-23.pdfThere
are max output powers, but not input power.
I am using UBX-160 daughterboard.
In https://kb.ettus.com/X300/X31
Hi All,
I am using MCX516A-CCAT for X410 USRP. It has three network ports, two for
100Gb QSFP and one for 1Gb ethernet. They are directly connected to host.
Surprisingly, I find much bigger latency on the 100Gb link than the 1Gb link
when ping them. I didn't notice this before.
Then I checked X
On Wednesday, 1 May 2024 at 15:15:12 BST, Marcus D. Leech
wrote:
On 01/05/2024 10:11, zhou via USRP-users wrote:
Hi Marcus,
Thanks for your response.
"Are you setting up clocking identically for both USRPs? That is setting
the reference clock to &qu
zero. But,
instantaneously, it is not. So, my question is: how instantaneous is your phase
measurement? If you instead calculate a phase averaged over numerous samples,
can you get a consistent result? From your plot, it looks like this is true.
Rob
On Wed, May 1, 2024 at 11:04 AM zhou via USRP-use
On Wednesday, 1 May 2024 at 15:15:12 BST, Marcus D. Leech
wrote:
On 01/05/2024 10:11, zhou via USRP-users wrote:
Hi Marcus,
Thanks for your response.
"Are you setting up clocking identically for both USRPs? That is setting
the reference clock to "externa
al")
I think this should automatically set both devices.
"What type of daughtercards are in your X310?"
UBX
Kind regards.
On Wednesday, 1 May 2024 at 14:19:44 BST, Marcus D. Leech
wrote:
On 01/05/2024 08:25, zhou via USRP-users wrote:
Hi All,
I am trying to
Hello all,
When calibrating X410 uhd_cal_tx_dc_offset --verbose
--args='192.168.20.2,mgmt_addr=192.168.6.99' --freq_start 2e9 --freq_stop 7.2e9
--precision 0.1 --freq_step 5e6 --subdev="A:0"
Error happened:Error: This board does not have the CAL antenna option, cannot
self-calibrate.
Loo
Hi Rob,
The transmitted signal is cos(t)+i*sin(t). The abs power will be constant. I
plot the real part to show the waveform which contains both power information
and phase information.
Thanks,Hongwei
On Thursday, 18 April 2024 at 16:51:22 BST, Rob Kossler via USRP-users
wrote:
The
Hi Pedro, Cédric,
I did some experiments with X310. I tried calibration with and without 30dB
loopback connection. I found that performance was very similar in both
approaches, so the conclusion is that loopback connection is unnecessary.
Maybe, the circuit in USRP had been changed since we fir
Hi Cédric,
It was instructed by Ettus engineer when we started to use USRPs a few years
ago. This is because there is no internal loopback path in circuit in X310. By
the way, we are using UBX daughterboard. Maybe this is not documented.
Regards,Hongwei
On Thursday, 29 February 2024 at 15
Hi Pedro,
I don't use the Python interface so I am not experienced on it.DC leakage can
happen on both Tx side and Rx side, that is, in your current setup, it can be
in USRP or in the spectrum analyzer.The spike in your spectrum is about 20dBm
higher than the signal, which is pretty significant
Hi Cédric ,
For X310 USRPs, you need to loopback connect the antenna ports. For N321, you
don't need. For other types, I don't know.
Regards,Hongwei
On Monday, 26 February 2024 at 10:00:41 GMT, Cédric Hannotier
wrote:
Hello zhou,
On 2024-02-23 20:44 +0000, zhou via USRP-u
Hi Pedro,
Interestingly, just found Marcus answered a similar question a few years back:
https://dsp.stackexchange.com/questions/30562/large-spike-at-the-center-frequency-when-using-ettus-x310
Your calibration range is pretty small. I normally calibrate from 500M - 6G
such that it can support m
Hi Pedro,
It could be DC leakage. Try to run the calibration commands. For X310, you need
to loopback connect Tx and Rx antennas with 30dB attenuators.
Regards,Hongwei
On Friday, 23 February 2024 at 01:52:37 GMT, Pedro Vieira
wrote:
An ofdm signal, which is generated in python, prese
for UHD 4.5 you could try.
So, I have to use UHD4.4 now.
Kind regards,Hongwei
On Monday, 11 September 2023 at 22:15:21 BST, Marcus D. Leech
wrote:
On 11/09/2023 12:09, zhou via USRP-users wrote:
Hi all,
I just set up a system with X410 USRP. Tried to run a benchmark rate test an
Hi all,
I just set up a system with X410 USRP. Tried to run a benchmark rate test and
saw a lot of errors. Please suggest what could be the reason for the test
failure. Host is R740 (16 CPU cores) and Linux is Ubuntu 22.04 with low-latency
kernel.100G Mellanox ConnectX-6 NIC cards
$ sudo /usr
cus D. Leech
wrote:
On 07/08/2023 09:41, zhou via USRP-users wrote:
Thanks for your quick response, Marcus.
On the 2nd question, I mean, when LO is different from the target RF freq,
DSP will make up the difference. LO leak will become a spurious signal at DSP
freq. Can this LO leak be
14:11:08 BST, Marcus D. Leech
wrote:
On 07/08/2023 04:40, zhou via USRP-users wrote:
Hi,
I have a question regarding USRP calibration. I am using X310 and UHD 4.4. To
save calibration time, the step size is set to be 5MHz and the freq range is
[600MHz, 6GHz]. My questions are: 1
Hi,
I have a question regarding USRP calibration. I am using X310 and UHD 4.4.To
save calibration time, the step size is set to be 5MHz and the freq range is
[600MHz, 6GHz].My questions are:1. will the compensation be made at these
discrete frequencies only, or interpolation will be applied to
Hi Marcus,
I am doing freq tuning in X310 USPR and find the description about sign may not
be correct in the following page:
https://files.ettus.com/manual/structuhd_1_1tune__request__t.html
Note that the meaning of the DSP frequency's sign differs between TX and RX
operations. The target frequ
gt; On 29/06/2023 09:36, zhou via USRP-users wrote:
>> I am using X310 USRPs. I did a loopback test with this USRP, that is, Tx was
>> connected to Rx (with a 20dB attenuator between them). This is for checking
>> the channel status.
>> In my test, Tx is free running with
Hello All,
I am using X310 USRPs. I did a loopback test with this USRP, that is, Tx was
connected to Rx (with a 20dB attenuator between them). This is for checking the
channel status.In my test, Tx is free running without stop, and Rx is
occasional. Both transmission and capture are time-based,
Hi Marcus,
The sampling rate can be 30.72MHz or 184,32MHz. It can vary in different test
cases.Below are the final parts of the pass and failed captures
(fs=30.72MHz):With eye, we can hardly see difference between these two
captures. EVM is not bad in the failed case but CRC failed.I am not too
sis but they did protect the signals I
need. It seems that the receiver shut down too early.
Could you share with us exactly how you're setting up the capture? What
stream arguments are you using, etc?
On Saturday, 20 May 2023 at 23:14:16 BST, Marcus D. Leech
wrote:
early.
On Saturday, 20 May 2023 at 23:14:16 BST, Marcus D. Leech
wrote:
On 20/05/2023 18:03, zhou via USRP-users wrote:
Hi,
I installed UHD 4.4 recently. I use USRP for both transmission and receive. I
find that EVM in the tail part of the captured signal is higher, e.g., in a
Hi,
I installed UHD 4.4 recently. I use USRP for both transmission and receive. I
find that EVM in the tail part of the captured signal is higher, e.g., in a
20-slot capture, in the first 19 slots, EVM~= 1.2%, but in slot#20, evm ~=2.9%.
UHD 3.10 was fine. I have found this problem in UHD 4.0 an
Hi,
When using uhd::stream_args_t stream_args("fc32", "sc16"), what is the scalar
used in conversion?
Thanks.
___
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To unsubscribe send an email to usrp-users-le...@lists.ettus.com
Hello,
I have got a new X410 USRP. No NIC card or cables came with it. My target radio
bandwidth will be 400MHz, so the NIC card and cable should support 100Gb. I
have looked around on google for shopping options. They are expensive.
Just wonder if anyone has successful experience in setting up
these commands via sudo, the results may be
in root’s home directory.
Thanks for picking up on that! Yeah, there's ZERO reason to run as root for
this stuff.
From: zhou via USRP-users
Sent: Tuesday, May 9, 2023 12:53 PM
To: usrp-users@lists.ettus.com; Mar
may be
in root’s home directory.
Thanks for picking up on that! Yeah, there's ZERO reason to run as root for
this stuff.
From: zhou via USRP-users
Sent: Tuesday, May 9, 2023 12:53 PM
To: usrp-users@lists.ettus.com; Marcus D. Leech
Subject: [USRP-user
wed that calibration was successful: The
calibration was successful!!! :-)
What other place can the .cal files be saved in?
Thanks again.
On Tuesday, 9 May 2023 at 17:28:02 BST, Marcus D. Leech
wrote:
On 09/05/2023 12:21, zhou via USRP-users wrote:
Hi,
I installed UHD 4.4 for
Hi,
I installed UHD 4.4 for X310 and calibrated USRPs, but I can't find the
expected .cal file under ${HOME}/.local/share/uhd/cal/. Actually, there is no
${HOME}/.local/share/uhd/ directory.
What can be wrong?
Thanks for any help,Hongwei
___
USRP-users
Hi Marcus,
Thanks for your quick reply. Really appreciate it.
Kind regards,Hongwei
On Saturday, 18 February 2023 at 17:10:39 GMT, Marcus D. Leech
wrote:
On 18/02/2023 03:27, zhou via USRP-users wrote:
Hi,
Some thoughts about X310. They could be silly but answer will be
Hi,
Some thoughts about X310. They could be silly but answer will be
appreciated:Why does X310 have dual 10GE ports? I think it is for achieving the
max 120MHz bandwidth. Though dual ports are provided, I can just use only one
but the max achievable bandwidth will be reduced.Am I correct?
Have
Hi,
Happy New Year!
I am using X310. Our application prints some log information. Meanwhile, UHD
also prints log information. Currently, all the logs are streamed to a file.
Saving log to file involves access to HD which is a low-speed device. I want to
save all logs into RAM first; then only a
4.2 to be more
like 3.15 and earlier.
Wade
On Wed, Oct 12, 2022 at 3:24 AM zhou via USRP-users
wrote:
Hi Marcus,
Different OS/kernels in the two systems.In old system with UHD 3.10, the
OS/kernel are Ubuntu 16.04.6 LTS (GNU/Linux 4.4.0-176-lowlatency x86_64)In new
system with UHD 4.1.0, the OS
iable. Could you please pass
my case to the R&D team to confirm?
Thanks, Hongwei
On Tuesday, 11 October 2022 at 18:35:24 BST, Marcus D. Leech
wrote:
On 2022-10-11 12:15, zhou via USRP-users wrote:
Hi,
Some of our USRPs are using UHD 3.10 because they a
h
wrote:
On 2022-10-11 12:15, zhou via USRP-users wrote:
Hi,
Some of our USRPs are using UHD 3.10 because they are in old systems. and I
am also using UHD 4.1.0 in some other USRPs in new system. The USRP products
are all NI USRP 2944 (X310). In my applications, I need t
eech
wrote:
On 2022-10-11 12:15, zhou via USRP-users wrote:
Hi,
Some of our USRPs are using UHD 3.10 because they are in old systems. and I
am also using UHD 4.1.0 in some other USRPs in new system. The USRP products
are all NI USRP 2944 (X310). In my applications, I need to use PPS si
Hello,
I am using R730 server to drive multiple USRPs. In my application code, I
assign different Tx/Rx threads to different NUMA nodes, but how can I make the
underlying UHD to use the same NUMA nodes?
Thanks,Hongwei
___
USRP-users mailing list -- u
Hi,
Some of our USRPs are using UHD 3.10 because they are in old systems. and I am
also using UHD 4.1.0 in some other USRPs in new system. The USRP products are
all NI USRP 2944 (X310).In my applications, I need to use PPS signal to
synchronize multiple USRPs. After applying PPS signals, I read
Thanks for your confirmation, Marcus.
On Friday, 12 August 2022 at 14:25:49 BST, Marcus D. Leech
wrote:
On 2022-08-12 08:49, zhou via USRP-users wrote:
Hi,
I have general question on power control in USRPs. I know the gain range is
from 0dB - 30dB. How is gain control
Hi,
I have general question on power control in USRPs. I know the gain range is
from 0dB - 30dB. How is gain control realized, by using active amplifier or
adjusting passive attenuators? Thanks,Hongwei
___
USRP-users mailing list -- usrp-users@lists.
I am using 2944 USRP which model is X310. We connect the Tx and Rx antenna
ports to the DUT via RF cables. The received power at 5GHz is about 23dB lower
than the one at 1GHz.We adjust gain in USRP to maintain the Rx power level at
different frequencies.N310 USRP has built-in power control func
Hi,
In my application, I also saw LO leakage. We have many USRPs. Their leakage can
be different . One way to avoid the impact is not to allocate data around DC in
baseband signal.
Regards,Hongwei
On Monday, 3 January 2022, 10:31:52 GMT, seckinoncu8...@gmail.com
wrote:
Hello Marcus,
ould get "fixed" in UHD, as it would be nice to not
have to maintain a custom FPGA build. I'm not sure what effect this change will
have on other USRP FPGA builds that use the same timekeeper.v file.
In any case, I'm guessing this is your problem.
Jim
From: zhou via US
"fixed" in UHD, as it would be nice to not
have to maintain a custom FPGA build. I'm not sure what effect this change will
have on other USRP FPGA builds that use the same timekeeper.v file.
In any case, I'm guessing this is your problem.
Jim
From: zhou via USRP-user
GA builds that use the same timekeeper.v file.
In any case, I'm guessing this is your problem.
Jim
From: zhou via USRP-users
Sent: Monday, December 20, 2021 5:31 AM
To: usrp-users@lists.ettus.com ; Marcus Müller
Subject: [USRP-users] Time different between X310 and N310 USRPs usi
Hi,
I am using mixed types of USRPs in my applications, namely, X310 and N310. The
signals are timed. I find 0.2-second time difference between these two
USRPs.Details:Each USRP is controlled by a Linux server;
The same Linux version in all PCs;All USRPs are connected to the same Octoclock;
UHD
Hi Marcus,
I am not seeking buffer change in USRP after your explanation in the previous
email. I am trying to adjust the host-side buffer to see if it can help.
As per your suggestion, I have tried getsockopt() to see what the send buffer
size is for a UDP socket.
//check buffer size before ch
Thank you Marcus.I tried as below:my_stream_args.args["send_buff_size"] =
std::to_string(50);
my_stream_args.args["send_buff_size"] = std::to_string(500);
They give the same results. The 1MB limit still exists. I don't know where this
limit comes from.Am I wrong in configuration?
O
Thanks Marcus. Yes, I am using 2xTx and 2xRx at 245Msps in N321.I understand
that if my host CPU is not fast enough, no matter how much buffer I have, it
won't help. Fortunately, my tests are actually working at most time, which
means that the CPU is fast enough for 245Msps. Maybe it is just ma
Hi Marcus,
I have a basic question: how to calibrate USRP? I have N321 and X310 models.For
X310, we have been calibrating them with loopback connection, that is,
connecting Tx to Rx with a 30dB attenuator between them. This was suggested by
an ettus engineer a few years back.I am wondering if I
Thank you Marcus.I originally thought that there might be two levels of
buffer, one in device and one in host, and the one in host was bigger and could
be configured by user, but after I checked the UHD library, I couldn't find the
host-side buffer. So, I agree with you that the host sends the
Hi Marcus, thanks for your reply.No, I am not on MacOS. I am using Ubuntu. How
can I configure send buff size in Linux?I went through the uhd library but
could not see it had any limit on buffer size. So, very strange where the
buffer limit comes from.
How do I measure the buffer?I created a pa
Hi,
I am trying to increase the buffer size in tx.
According to https://files.ettus.com/manual/page_transport.html,
it seems that we can change the default send_buff_size by specifying value in
device arguments. I tried the following configuration:
uhd::usrp::multi_usrp::make('addr=192.168.12.
ers--they inherently want to support
"jumbo frames".
On Monday, 6 September 2021, 22:33:35 BST, zhou via USRP-users
wrote:
Hi,
I have a problem with the N321 USRP. I find packet dropped in USRP but not in
host. In host, I am running Ubuntu 18.04.
Thanks for your suggestion, Marcus.
On Tuesday, 7 September 2021, 14:21:19 BST, Marcus D. Leech
wrote:
On 2021-09-07 8:12 a.m., zhou wrote:
Hi Marcus,
Thanks for your comments on my other USRP questions. I have another issue
with N321 USRP. Following the tuning tip
tion is NOT one
that I have seen in 10GiGe controllers--they inherently want to support
"jumbo frames".
On Monday, 6 September 2021, 22:33:35 BST, zhou via USRP-users
wrote:
Hi,
I have a problem with the N321 USRP. I find packet dropped
Hi Marcus,
Thanks for your comments on my other USRP questions. I have another issue
with N321 USRP.Following the tuning tips in
https://kb.ettus.com/USRP_Host_Performance_Tuning_Tips_and_Tricks , I have set
wmem_max, wmem_default, rmem_max, rmem_default to 33554432 in host (Ubuntu):
sud
ut be unable to actually support it,
although that situation is NOT one
that I have seen in 10GiGe controllers--they inherently want to support
"jumbo frames".
On Monday, 6 September 2021, 22:33:35 BST, zhou via USRP-users
wrote:
Hi,
I have a p
one is correct? :
Thanks.
On Monday, 6 September 2021, 22:33:35 BST, zhou via USRP-users
wrote:
Hi,
I have a problem with the N321 USRP. I find packet droppedin USRP but not in
host. In host, I am running Ubuntu 18.04.
Below is the ifconfig result in N321:
root@ni-n3xx-320CAAB
Hi,
I have a problem with the N321 USRP. I find packet droppedin USRP but not in
host. In host, I am running Ubuntu 18.04.
Below is the ifconfig result in N321:
root@ni-n3xx-320CAAB:~# ifconfig
eth0 Linkencap:Ethernet HWaddr 00:80:2F:32:36:BA
inetaddr:192.168.10.165 Bcast:
a matter of luck.
On Sunday, 5 September 2021, 20:47:39 BST, Marcus D. Leech
wrote:
On 2021-09-05 11:28 a.m., zhou via USRP-users wrote:
Hi All,
I have a problem in using X310 USRP after upgrading UHD from 3.10 to 4.1.0. I
am using it to capture NR5G rad
On Sunday, 5 September 2021, 20:47:39 BST, Marcus D. Leech
wrote:
On 2021-09-05 11:28 a.m., zhou via USRP-users wrote:
Hi All,
I have a problem in using X310 USRP after upgrading UHD from 3.10 to 4.1.0. I
am using it to capture NR5G radio signal in UL. After analyzing the cap
Hi All,
I have a problem in using X310 USRP after upgrading UHD from 3.10 to 4.1.0. I
am using it to capture NR5G radio signal in UL. After analyzing the captured
signal, the quality in the last subframe is worse than the earlier
subframes.EVM =[1.014, 1.08, 1.055, 1.053, 0.954, 1.043, 1.145, 1.
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