Hi all,In the example tx_timed_samples.cppthere is tx_stream->send(... , ... ,
..., timeout)How the timeout works?when I set the value of timeout zero or
0.1, I expect that the terminal show the "Send timeout..."because it will
not have enough time to send all samples during timeout 0.(I exp
Hi guys!please let me know whether following operation is possible!we have USRP
B200.All I want to do is to transmit a specific signal without distorting
phase.Say, I want to transmit the cosine wave, which have center frequency fc =
3Mhz and phase is 60 degree(i.e. y = cos(2*pi*3e6*t + pi/3) )
Hi.I use USRP B200 with external on-board GPSDO.1. I set the clock source and
time soure to GPSDOusrp->set_clock_source("gpsdo", 0);
usrp->set_time_source("gpsdo", 0);2. Set_time_next_pps and sleep 2 secs.
usrp->set_time_next_pps(uhd::time_spec_t(0.0), 0);
boost::this_thread::sleep
Hi all.When I executed the uhd example(test_messages.cpp) using USRP B200, lots
of test failed.I want to know whether following results are normal or not.I
executed each of the following three commands twice.1. sudo
./test_messagesSummary:Test Burst ACK-> 8 successes, 4 failuresTest
U
Hi all.In rx_medata_t, there is a time_spec which displays the time when a
first sample is received.Thus, we can see the timing difference between the
time "actually" transmitted and the time we "command".For example, I command
"issue_stream_command" to start receiving at time t0, but I noticed
Hi all.I'm still trying to know that when we command to transmit the samples at
specific time t0, its actual transmitted time is exact time t0?because, in Rx,
it does not receive exact time t0. there are some delays between them(about
30us depending on the master clock rate or sampling rate, tha
Hi.I have two USRP B200 and each USRP is equipped with GPSDO. Also, I have one
5v active GPS antenna, and one power divider(1 input and 2 outputs) whose
operation frequency is 0.7~2.7GHz.In power divider, the input port is connected
to the GPS antenna and each output port is connected to a diffe
at least 3dB loss for GPS signal that has no
noticeable adverse effect on GPSDO performance
On Mon, Nov 27, 2017 at 5:13 PM, Hojoon Yang via USRP-users
wrote:
Hi.
I have two USRP B200 and each USRP is equipped with GPSDO. Also, I have
one
Hi all.Could someone share the execution results of "test_messages" example?
Because there are several test failures in my result.I use USRP B200 with
GPSDO.My result is as follows. Is it normal
result?--Summary:Test Burst ACK->14 successes,
2 failuresTest Unde
Hi, folks.In application note from Ettus, "Synchronization and MIMO Capability
with USRP Devices",They said that "Generally, these fractional-N
synthesizers introduce a random phase offset after each retune."What does
"random phase offset" mean?Q1. Does it mean that if I send a signal,
Acos(fc*t
Hi.I have two USRP X310s and wonder which board between SBX and UBX would be
the suitable for me.I'm gonna buy four daughterboards to use it as 2x2 MIMO.
One USRP X310 for Tx, the other USRP for Rx.My target frequency is from 1.8GHz
to 2.8GHz. According to datasheet, Both UBX and SBX work on the
Hi all.Let's say we have one USRP X310 and two UBX-160 daughterboards.According
to the page_sync manual(i.e. https://files.ettus.com/manual/page_sync.html),
there is a code snippet for aligning LOs.Do I need to execute the same thing
for Tx? Because the code only describes for Rx case.Regards,__
Hi.I got an octoclock-G (GPSDO included) yesterday.I connected the octoclock
(without external antenna) to usrp b210 properly.However, when I executed the
usrp_list_sensors.cpp or test_clock_synch.cpp which are included in
examples,sometimes I got that Reference is not locked, sometimes I got re
-From: "Marcus D.
Leech via USRP-users" To:
usrp-users@lists.ettus.comSent date: 2018-04-25 02:51:18 GMT +0900
(ROK)Subject: Re: [USRP-users] Octoclock reference unlock
On 04/24/2018 11:34 AM, Hojoon Yang via USRP-users wrote:
Hi.
I got an octoclock-G (
us.comSent date: 2018-04-25 11:41:08 GMT +0900
(ROK)Subject: Re: [USRP-users] Octoclock reference unlock
On 04/24/2018 10:34 PM, Hojoon Yang via USRP-users wrote:
>
> Hi, Marcus.
>
> 1. usrp_list_sensors
>
> I didn
본메일---보낸사람 : "Marcus D. Leech via
USRP-users" 받는사람: usrp-users@lists.ettus.com보낸날짜:
2018-04-25 22:02:35 GMT +0900 (ROK)제목: Re: [USRP-users] Octoclock reference
unlock
On 04/24/2018 11:24 PM, Hojoon Yang via USRP-users wrote:
>
> Thank you for
Hi,I connected one usrp b210 and one usrp b200 to octoclock for
synchronization.I'm trying to verify that the usrps connected to octoclock is
"really" synchronized.To check it, I did as
follows.usrp->set_time_next_pps(uhd::time_spec_t(0.0));usrp2->set_time_next_pps(uhd::time_spec_t(0.0));boost::
메일---보낸사람 : "Marcus D. Leech via
USRP-users" 받는사람: usrp-users@lists.ettus.com보낸날짜:
2018-04-26 01:41:04 GMT +0900 (Asia/Seoul)제목: Re: [USRP-users] synchronization
between two usrps.
On 04/25/2018 10:53 AM, Hojoon Yang via USRP-users wrote:
Hi,For synchronization, manual(i.e.
https://files.ettus.com/manual/page_sync.html) said md.start_of_burst =
false.However, in tx_timed_samples.cpp, md.start_of_burst = true.Both manual
and tx_timed_samples.cpp are latest version.which uage is right?-hojoon
Ah, sorry. there are some typos.manual : start_of_burst = true.exapmle :
start_of_burst = false.Sorry about that.-hojoon
---원본메일---보낸사람 : Hojoon Yangvia
USRP-users 받는사람: usrp-users@lists.ettus.com보낸날짜:
2018-04-30 11:34:48 GMT +0900 (ROK)제목: [USRP-users]Wha
Hi, all.In manual, I see the following sentece."The GPSDO improves the accuracy
of the internal frequency reference to 20 ppb, or 0.1 ppb if the GPS is
synchronized to the GPS constellation."[1]It said 0.1 ppb if the GPS
synchronized. However, in the below table, Frequency Accuracy is
+-0.01ppb
OK)Subject: Re: [USRP-users] X310 frequency accuracy spec
On 05/02/2018 12:32 AM, Hojoon Yang via USRP-users wrote:
Hi, all.
In manual, I see the following sentece.
"The GPSDO improves the accuracy of the internal frequency reference to 20
ppb, or
Hi,I transmitted 0.3 + 0.3i signals on the 900e6 frequency(i.e. sudo
./tx_waveforms --rate 1e6 --freq 900e6 --ref "external" --gain 85)and then I
received the signal(i.e. sudo ./rx_samples_to_file --type "float" --rate 1e6
--freq 900e6 --gain 40 --nsamps 1)and then I extracted the real and
Hi,When I executed the "uhd_find_devices"I got "[ERROR] [USB] USB open failed:
insufficient permissions."However, when I put sudo in it(i.e. sudo
uhd_find_devices", there is no such error.Also, when I typed "./tx_waveforms
..."I got an following WARNING"[WARNING] [UHD] Unable to set the thread
users] UHD installation
On 05/07/2018 09:42 PM, Hojoon Yang via USRP-users wrote:
Hi,
When I executed the "uhd_find_devices"
I got "[ERROR] [USB] USB open failed: insufficient permissions."
However, when I put sudo in
ists.ettus.com
Sent date: 2018-05-08 10:47:47 GMT +0900 (Asia/Seoul)
Subject: Re: [USRP-users] UHD installation
On 05/07/2018 09:42 PM, Hojoon Yang via USRP-users wrote:
Hi,
When I executed the "uhd_find_devices"
I got
Hi,I am currently using UHD 3.11.0.1 and I have two USRPs, B210 and X310.while
executing the tx_timed_samples in the example, the behavior of the send()
function was different between B210 and X310.More specifically,In B210, I do
./tx_timed_samples --rate 1e6 --secs 8 --nsamps 100 --args nam
In addition, USRP X310 + 2 UBX-160 v2
---원본메일---보낸사람 : Hojoon Yang via
USRP-users 받는사람: usrp-users@lists.ettus.com보낸날짜:
2018-05-25 20:59:17 GMT +0900 (Asia/Seoul)제목: [USRP-users]timed stream in USRP
X310 and B210
Hi,
I am currently using UHD
us.comSent date: 2018-05-25 23:12:28 GMT +0900
(Asia/Seoul)Subject: Re: [USRP-users] timed stream in USRP X310 and B210
On 05/25/2018 10:06 AM, Hojoon Yang via USRP-users wrote:
In addition, USRP X310 + 2 UBX-160 v2
-
In X310, when I reduce the total number of samples from 1,000,000 to 100,000,
it returns success.However, in the B210, it returns success even though the #
of samples is 1,000,000.
---Original Message---From: Hojoon Yang
via USRP-users To: "Mar
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
he literature that is
recommended in the communications basics lecture. If there's no such
lecture at your university, GNU Radio does have a recommended reading
page:
https://wiki.gnuradio.org/index.php/SuggestedReading
Best regards,
Marcus
On Mon, 20
Hi,I am using USRP X310 with two UBX-160 daughterboards.In my application, I am
using timed transmission, for example,start transmission at
(usrp_get_time_now() + delta)My question is, what is the smallest delta value
that can be successful in the *real world*? Theoretically, the delta can be an
On Thu, Jul 5, 2018 at 12:34 PM, Hojoon Yang via USRP-users
wrote:
Hi,
I am using USRP X310 with two UBX-160 daughterboards.
In my application, I am using timed transmission, for example,
start transmission at (us
Hi,I'm using a USRP X310 + 2 UBX-160 for 2x2 MIMO application.For synchronizing
4 channels(2 TX, 2 RX) in the USRP X310, I read the manual[1] and perform the
following.set_time_unknown_pps()set_tx_rate(rate)set_rx_rate(rate)uhd::time_spec_t
cmd_time = usrp->get_time_now() +
uhd::time_spec_t(0.1
Hi, all.Can anyone confirm this please?Thanks!
---원본메일---보낸사람 : Hojoon Yang via
USRP-users 받는사람: usrp-users
보낸날짜: 2018-07-15 19:36:08 GMT +0900 (ROK)제목:
[USRP-users]Synchronizing channels in USRP X310
Hi,
I'm using a USRP X310 + 2 UBX-16
Hi, allI want to give *lo offset* for tune_request.In C++, I'm able to set the
lo_offset for tune_request, i.e. uhd::tune_request_t tune_request(target_freq,
lo_offset)In C, How can I achieve this using
uhd_tune_request_t?uhd_tune_request_t tune_request = { .target_freq =
target_freq, .rf
lo offset to uhd_tune_request_t
On 08/16/2018 01:38 PM, Hojoon Yang via USRP-users wrote:
Hi, all
I want to give *lo offset* for tune_request.
In C++, I'm able to set the lo_offset for tune_request, i.e.
uhd::tune_request_t tune_requ
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