[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread brendan . horsfield
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[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread brendan . horsfield
Yes, I am using UHD v4.0.0.0, built from source on my HP Omen laptop (Intel Core i7-8750H CPU, 32MB RAM, 512GB SSD). ___ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread Marcus D. Leech
On 04/13/2021 11:23 PM, Brendan Horsfield wrote: Fair enough. To ensure that this problem is logged with the Ettus engineering team, is there an official mailing list or email address that I should report this bug to? You can put an issue in the GitHub repository: https://github.com/EttusRese

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread brendan . horsfield
Code snippet in previous post got scrambled by Gmail. Should have read: ``` while num_rx_samps < target_num_samples:    try:        samps = rx_streamer.recv(recv_buffer, metadata)        print(metadata.error_code)        if samps: etc ``` __

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread Brendan Horsfield
Further to my original post, it appears that it is not just the number of dropped samples that is being missed by the metadata object. As an experiment, I modified the benchmark_rate.py example so that the metadata error_code flag is printed out every time the recv() method is called: while num_r

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread Brendan Horsfield
Fair enough. To ensure that this problem is logged with the Ettus engineering team, is there an official mailing list or email address that I should report this bug to? On Wed, Apr 14, 2021 at 12:02 PM Marcus D Leech wrote: > That just sounds like a bug. The Python API is still considered > exp

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread Marcus D Leech
That just sounds like a bug. The Python API is still considered experimental. Sent from my iPhone > On Apr 13, 2021, at 9:22 PM, Brendan Horsfield > wrote: > >  > Hi Marcus, > > I have run some comparison tests between the C++ and Python versions of > "benchmark_rate", using a high samplin

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread Brendan Horsfield
Hi Marcus, I have run some comparison tests between the C++ and Python versions of "benchmark_rate", using a high sampling rate in order to force some overruns. It appears that both versions are detecting & reporting overrun events correctly. However, when it comes to the number of dropped sampl

[USRP-users] Re: B205 mini-i isn't found by uhd_find_devices

2021-04-13 Thread paradis
Hi Marcus, I originally build the UHD without the 64bit option, then I rebuilt it with the 64bit on, but I didn’t uninstall the first UHD build. That might be causing some issues. Maybe I’ll do a clean install and try again. Also, yes, I did a ‘sudo ldconfig’ after the build/install. Thanks, h

[USRP-users] Re: B205 mini-i isn't found by uhd_find_devices

2021-04-13 Thread Marcus D Leech
This is the kind of error that happens when you have a “mixed” system with libraries and utilities from different builds. Also after rhe build/install did you “sudo ldconfig” ? Sent from my iPhone > On Apr 13, 2021, at 2:38 PM, Robin Coxe wrote: > >  > Have you checked the B205mini-i board

[USRP-users] Re: B205 mini-i isn't found by uhd_find_devices

2021-04-13 Thread Robin Coxe
Have you checked the B205mini-i board itself to ensure the USB connector pins are soldered down securely? There have been instances where a dislodged connector caused USB connection issues. (If not, you can either retouch the connections yourself with a soldering iron or RMA to NI.) On Tue,

[USRP-users] Re: B205 mini-i isn't found by uhd_find_devices

2021-04-13 Thread paradis
Hi Marcus, thanks for the response. So I tried to do what you suggested, but unfortunately it’s giving me and error, and google isn’t being helpful at all, maybe you’ve seen this before? /usr/local/lib64/uhd/utils/b2xx_fx3_utils: symbol lookup error: /usr/local/lib64/uhd/utils/b2xx_fx3_utils: u

[USRP-users] Using of tune_request() - python UHD API

2021-04-13 Thread isaac mario tupac davila
Hello everyone Mi name is Isaac. I'd like to ask a question about the use of the method tune_request(). I am thinking to tune my reception frequencies using the method tune_request() and the time_spec() method with values of microseconds. My question is: Is it possible that a USRP N210 could tune

[USRP-users] Re: How to tx s16 file with tx_samples_from_file

2021-04-13 Thread Marcus D. Leech
On 04/13/2021 10:17 AM, 王璀 WANG Cui wrote: I am testing with software generated GPS L1 C/A signal and the sampling rate is 1.023M sps, same as the C/A code rate 1.023M chips/s. The result baseband signal file can be tracked and positioned by gnss-sdr receiver. So I am wondering: I am not us

[USRP-users] Re: How to tx s16 file with tx_samples_from_file

2021-04-13 Thread 王璀 WANG Cui
I am testing with software generated GPS L1 C/A signal and the sampling rate is 1.023M sps, same as the C/A code rate 1.023M chips/s. The result baseband signal file can be tracked and positioned by gnss-sdr receiver. So I am wondering: I am not using 2B sampling rate (say 2.046 sps), but seems

[USRP-users] Re: How to tx s16 file with tx_samples_from_file

2021-04-13 Thread Marcus D. Leech
On 04/13/2021 12:21 AM, 王璀 WANG Cui wrote: I am not expert in this, do you mean if sample in real format, we must double the sample rate, to contain both I phase and Q phase information? In my application, I just sample at baseband digital code rate (Nyquist Freq), and seems it works well wh

[USRP-users] Re: I/Q swapping situation with RFNoC block

2021-04-13 Thread Rob Kossler
Hi Jonathon, I am using register pokes (poke32). My block controller reads the I/Q taps out of a file that is the identical format of an I/Q file that I would use for streaming to or from the USRP (SC16 such as rx_samples_to_file or tx_samples_from_file). If streaming using send() or recv() things

[USRP-users] Re: Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread Marcus D Leech
Sent from my iPhone > On Apr 13, 2021, at 3:05 AM, brendan.horsfi...@vectalabs.com wrote: > >  > Hi All, > > I am using a Python script to capture a short burst of rx samples from my > B210. The script is based heavily on the Ettus example “benchmark_rate.py”, > with a couple of additional

[USRP-users] Contradictory overflow messages when recording rx samples with Python API

2021-04-13 Thread brendan . horsfield
Hi All, I am using a Python script to capture a short burst of rx samples from my B210. The script is based heavily on the Ettus example “benchmark_rate.py”, with a couple of additional tweaks I took from the Ettus GitHub repo (https://github.com/EttusResearch/uhd/blob/master/host/python/uhd/u

[USRP-users] Re: AXI Stream Issue

2021-04-13 Thread Paolo Palana
Cheers to all the mailing list. I have similar problem too (the device is an X310 with TwinRx, UHD-3.15 on ubuntu 20.04). My NoC Block too has 2 input and 2 output at a different data rate. The start streaming goes smootly and it seems to work for a while, but when I stop the streaming (during my