[USRP-users] spectrum analyzer USRP N210

Ivan Zahartchuk adray0001 at gmail.com
Thu Nov 16 06:10:11 EST 2017


I mixed the files and the card was sewn but the carriers as they were and
remained.

2017-11-16 12:30 GMT+02:00 Michał Wróbel <michal.a.wrobel at gmail.com>:

> Hey Derek,
>
>
> Hi Ivan, it's Michał here. ;-)
>
> uhd_image_loader --args="type=usrp2,addr=192.168.10.2,overwrite-safe"
>
>
> DON'T use "overwrite-safe" here! It's only for unbricking the device. If
> the firmware I sent you is incorrect - it might do the opposite - *brick*
> the firmware, so that you'll have to use a JTAG to recover it afterwards
> (BTW. do you have it, just in case?)
>
> Just use --args="type=usrp2,addr=192.168.10.2" as described in the "Load
> the Images onto the On-board Flash (USRP-N Series only)" / "Use the image
> loader" section (not the one in "Unbricking an N-Series Device").
>
> Regarding the "The file at path (...) is not a valid firmware image" error
> - indeed the firmware file I sent you is not compatible with
> uhd_image_loader. I'll check that later (maybe today evening).
>
> In the meantime I think you might try to mix stock FW image (i.e. from
> uhd-images package) with my FPGA image. Let me know if that works for you.
>
> Best,
> Michał
>
> 2017-11-16 8:31 GMT+01:00 Ivan Zahartchuk <adray0001 at gmail.com>:
>
>> Hey Derek,
>> when the board was flashed, I got an error:
>>
>> uhd_image_loader --args="type=usrp2,addr=192.168.10.2,overwrite-safe"
>> --fw-path=usrp_n210_fw1.bin --fpga-path=usrp_n210_r4_fpga1.bin
>> linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.heads-release_
>> 003_010_002_000-0-gbd6e21dc
>>
>> Unit: USRP N210 r4 (311D7A1, 192.168.10.2)
>> Error: RuntimeError: The file at path "/home/suppression/usrp_n210_fw1.bin"
>> is not a valid firmware image.
>>
>> Best regards,
>> Ivan
>>
>> 2017-11-15 22:12 GMT+02:00 Michał Wróbel <michal.a.wrobel at gmail.com>:
>>
>>> Hey Ivan,
>>>
>>> I compiled the firmware for you. I assumed that you are using USRP N210
>>> R4. See the attachment. As said before - I didn't check it as I have no
>>> such hardware - it might completely not work (i.e. not even boot up). Let
>>> me know if it works.
>>>
>>> Best,
>>> Michał
>>>
>>> 2017-11-15 18:12 GMT+01:00 Ivan Zahartchuk <adray0001 at gmail.com>:
>>>
>>>> Hi again.
>>>>
>>>> I've tried everything described in the article you're refering to. I'd
>>>> be extremely grateful if you could try to compile FPGA bitstream for USRP
>>>> N210 and send it to me.
>>>>
>>>> Best regards,
>>>> Ivan
>>>>
>>>> 2017-11-15 17:21 GMT+02:00 Michał Wróbel <michal.a.wrobel at gmail.com>:
>>>>
>>>>> Hey Ivan,
>>>>>
>>>>> if the problem with the spikes is what I think it is, you'll need a
>>>>> new build of the FPGA bitstream. I can try to compile one with the most
>>>>> fresh version from GitHub, but as I don't have USRP N210 (I only own
>>>>> USRP2), I have no way to confirm that it works properly before I will send
>>>>> it to you. Have you ever flashed your USRP (i.e. like described here
>>>>> <https://files.ettus.com/manual/page_usrp2.html#usrp2_loadflash>)?
>>>>>
>>>>> Also, Derek Kozel's has some other really good advice about spectrum
>>>>> flatness, device calibration, etc. You should definitely try that too.
>>>>>
>>>>> Best,
>>>>> Michał
>>>>>
>>>>>
>>>>> 2017-11-15 14:51 GMT+01:00 Ivan Zahartchuk <adray0001 at gmail.com>:
>>>>>
>>>>>> Tell me how to fix this problem. I'm not very versed in the FPGA
>>>>>>
>>>>>> 2017-11-15 15:51 GMT+02:00 Ivan Zahartchuk <adray0001 at gmail.com>:
>>>>>>
>>>>>>> Tell me how to fix this problem. I'm not very versed in the FIG.
>>>>>>>
>>>>>>> 2017-11-15 15:39 GMT+02:00 Michał Wróbel <michal.a.wrobel at gmail.com>
>>>>>>> :
>>>>>>>
>>>>>>>> Hi Ivan,
>>>>>>>>
>>>>>>>> these spikes look similar to what I am experiencing with my
>>>>>>>> USRP2+WBX and what seems to be already fixed in the GitHub repository:
>>>>>>>>
>>>>>>>> https://github.com/EttusResearch/fpga/pull/4
>>>>>>>>
>>>>>>>> I have asked about that just yesterday:
>>>>>>>>
>>>>>>>> http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/
>>>>>>>> 2017-November/027054.html
>>>>>>>>
>>>>>>>> Best regards,
>>>>>>>> Michał
>>>>>>>>
>>>>>>>> 2017-11-15 14:26 GMT+01:00 Ivan Zahartchuk via USRP-users <
>>>>>>>> usrp-users at lists.ettus.com>:
>>>>>>>>
>>>>>>>>> Hello. I'm trying to make a broadband spectrum analyzer. I
>>>>>>>>> encountered some difficulties with the USRP N210 board. At
>>>>>>>>> certain frequencies, I get such a picture. And there are problems
>>>>>>>>> with the presence of central frequencies. Advise me how to remove
>>>>>>>>> these shortcomings.
>>>>>>>>> My code:
>>>>>>>>>
>>>>>>>>> n = int(math.ceil((config.stop_freq - config.start_freq) / config.band))
>>>>>>>>> fft1 = np.array([], dtype=np.complex64)
>>>>>>>>> for i in range(0, n):
>>>>>>>>>     usrp.set_rx_freq(lib.types.tune_request(config.start_freq + config.band / 2 + config.band * i), 0)
>>>>>>>>>     streamer.recv(recv_buff, config.metadata)
>>>>>>>>>     if config.metadata.error_code == lib.types.rx_metadata_error_code.timeout:
>>>>>>>>>         print ("ERRROR")
>>>>>>>>>     elif config.metadata.error_code == lib.types.rx_metadata_error_code.late:
>>>>>>>>>         print ("ERR1")
>>>>>>>>>     elif config.metadata.error_code == lib.types.rx_metadata_error_code.broken_chain:
>>>>>>>>>         print ("ERR2")
>>>>>>>>>     elif config.metadata.error_code == lib.types.rx_metadata_error_code.overflow:
>>>>>>>>>         print ("ERR3")
>>>>>>>>>     elif config.metadata.error_code == lib.types.rx_metadata_error_code.alignment:
>>>>>>>>>         print ("ERR4")
>>>>>>>>>     elif config.metadata.error_code == lib.types.rx_metadata_error_code.bad_packet:
>>>>>>>>>         print ("ERR5")
>>>>>>>>>
>>>>>>>>>     prom1 = np.fft.fft(recv_buff)
>>>>>>>>>     prom1[0:5] = 0
>>>>>>>>>     prom1[num_samps-5:num_samps] = 0
>>>>>>>>>     prom1= np.fft.fftshift(prom1)*w
>>>>>>>>>     fft1 = np.hstack((fft1,prom1))
>>>>>>>>>
>>>>>>>>>     stream_cmd.time_spec = lib.types.time_spec(0)
>>>>>>>>>     streamer.issue_stream_cmd(stream_cmd)
>>>>>>>>>
>>>>>>>>> dbm = np.array(10 * np.log10(np.abs(fft1))  - 60)
>>>>>>>>>
>>>>>>>>> return dbm,config.start_freq+(config.band/num_samps)*np.arange(dbm.size)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> USRP-users mailing list
>>>>>>>>> USRP-users at lists.ettus.com
>>>>>>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20171116/18935ded/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ?????? ?????? ?? 2017-11-16 13:07:48.png
Type: image/png
Size: 52582 bytes
Desc: not available
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20171116/18935ded/attachment.png>


More information about the USRP-users mailing list