this is my tuning code
tune_request.target_freq = Frequency*MHzToHz;tune_request.rf_freq_policy =
UHD_TUNE_REQUEST_POLICY_AUTO;
tune_request.dsp_freq_policy = UHD_TUNE_REQUEST_POLICY_AUTO;
if frequency is less 50 MHz signal in spectrum is out (banwidth 1 MHz)
.
__
Hello
In documatation indicates that minimum frequency of receiver TwinRX is 10MHz but
when I tune in 49 MHz there is no signal.
What exactly minimum tunable frequncy og TwinRX ?If it means that min =
frequency
- band / 2 ?How in this case will tune in to a frequency below 5MHz ?
Thank you
.
___
Пересылаемое сообщение
От: Андрей 1
Дата: 22.03.2018, 10:03
Кому: Usrp Users
Тема: RE: RE: Command inside streaming
After getting UHD_ERROR_IO, I stop receiving data and have to reopening then
device
(uhd_rx_streamer_free,uhd_usrp_free,uhd_usrp_make,uhd_rx_streamer_make,uhd_usr
After getting UHD_ERROR_IO, I stop receiving data and have to reopening then
device
(uhd_rx_streamer_free,uhd_usrp_free,uhd_usrp_make,uhd_rx_streamer_make,uhd_usrp_get_rx_stream
and other).
My questionIf I can call a function uhd_usrp_get_time_now inside streaming why
occurs error that discribe ea
My configuration:OS Windows7 x32 UHD version 3.10.3 X300+one twinRX.Sample rate
12.5 MHz. 1 Gbit Ethernet.I switch the antennas and request data from two
channel
as quickly as possible(~ 20 times per second).
Initially, the function get_time_now works fine but after some time the result
returns
Sorry. I was wrong. uhd_usrp_get_time_now
Thank you
Пересылаемое сообщение
От: Андрей 1
Дата: 21.03.2018, 17:34
Кому: Usrp Users
Тема: Command inside streaming
Ok.
But when I frequently call uhd_usrp_set_time_now sometimes I get UHD_IO_ERROR
error after which there is no data
Ok.
But when I frequently call uhd_usrp_set_time_now sometimes I get UHD_IO_ERROR
error after which there is no data and I have to close and open the device.
Thank you
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/
Hello
Can I use uhd_usrp_set_rx_freq between UHD_STREAM_MODE_START_CONTINUOUS and
UHD_STREAM_MODE_STOP_CONTINUOUS.Another question is about using
uhd_usrp_get_time_now inside streaming.Let's say I need to switch the antennas.
The B210 board does not have a GPIO and then I use an external switch an
I think that the results with clock() are correct.The main issue is that the
time
at which data from all frequencies is present is meaningably greater than 5
msюIf
I set the time to 5 ms as in the original example, the receiver will not be able
to rebuild and the time measurement shows that it n
HelloEarlier I already wrote about big times for the example of
twinrx_freq_hopping
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2018-February/027782.htmlCan
anyone analyze the source code(rx_samples_c in the attachment) and say why it
turns out such a strange result (TestTwinRX) wh
Source code in the attachment
15.03.2018, 15:44, Андрей 1 Hello
I duplicated the attachment with the source code.Derek can you see what's
wrong.I can understand what the maximum speed of perestroika I can get with
TwinRX.
Thank you
/*
* Copyright 2015 Ettus Research LLC
*
* This program
Hello
I duplicated the attachment with the source code.Derek can you see what's
wrong.I
can understand what the maximum speed of perestroika I can get with TwinRX.
Thank you
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/m
200 MS/s real (100
MS/s complex) then that IF filtering is insufficient and aliasing will occur.
Additionally the IP for doing the final conversion to baseband is based on
having that full bandwidth available.
Regards,
Derek
On Fri, Mar 2, 2018 at 2:57 PM, Андрей 1 via USRP-users
wrote
Mar 2, 2018 at 7:57 AM, Андрей 1 via USRP-users
wrote:
Hello
When I open device with uhd_usrp_make in the terminal I see a message
"invalid sample rate 100 MHz actual rate is 200 MHz".The same message I
see when running application from uhd samples folder.If I set sample
Hello
In the previous post(twinrx_freq_hopping example), I wrote that I could not get
time in 5 ms for example twinrx_freq_hopping.I measure the commands execute time
in the recieve loop and found with surprise that the set_rx_lo_source function
for the first time worked 0 ms and the next time mor
Will there be a compiled example for windows?
Thank you
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
mance difference like that since
it is only a wrapper. Are you still using timed commands? If not then the
additional overhead of sending commands from the host computer to the USRP
and back could account for some of the performance difference.
On Mon, Feb 26, 2018 at 3:53 PM, Андрей 1 via USRP-
Thank you for the clarification about set_rx_lo_freq.
Can the problem with long setup time arise due to the fact that I use C API?
Thank you
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.e
I have no any error in twinrx_recv.If the tuning frequency is already
sufficiently small, then why these special calls(set_rx_lo_freq) for twinRX?
Thank you
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/us
Im using UHD 3.10.3 and have no error in twinrx_recv
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Hello
Im using X300+TwinRX in Windows.In source UHD 3.10.3 for linux I found example
twinrx_freq_hopping.How much I understand in this example the receiver is tuned
with the period 5ms.As written in the title of the example, I need to use
set_rx_lo_freq.But it is not in the source code of the exam
Sample rate is 625 kHz and usb3.0 is internal intel controller.
The problem with uhd_rx_metadata_error_code_timeout error occurs both on the
desktop and laptop.
By the way, I did not notice such a problem in single-channel mode.
___
USRP-users mailing l
Hello
My device is b210 version of UHD is 3.9.5 OS Windows7.
I work with this device in dual channel mode.Occasionaly after call function
sampler_recv I have uhd_rx_metadata_error_code_timeout error.When the number of
errors exceeds a certain number (usually 9) аll further calls for reading data
Hello
My device is b210 version of UHD is 3.9.5 OS Windows7
I try get samples in dual channel mode and I dont wont use continuious stream
becose in its hard for pc for high sample rate.
So I use UHD_STREAM_MODE_NUM_SAMPS_AND_DONE and periodicaly have
uhd_rx_metadata_error_code_timeout error with
24 matches
Mail list logo
