Re: [Discuss-gnuradio] USRP N200 issues and fault troubleshooting

[Derek Kozel]

Hi Ayaz,

This is a USRP question rather than a GNU Radio one so I've copied your message over to the other list. If you're not a member of the usrp-users mailing list you should join that so you can see the responses.

It looks like you have BasicRX and BasicTX daugtherboards installed, is that correct? Those daughterboards expose the I and Q channels independently to SMA connectors. You can read about how to use them in different configurations on this page in the manual.
http://files.ettus.com/manual/page_dboards.html#dboards_basicrx

Regards,

Derek

On Thu, Aug 2, 2018 at 8:32 PM, Ayaz Mahmud <address@hidden> wrote:

Hi,

 

In addition, I have done the following troubleshooting steps as mentioned in the page:

 

Fan spin (checked)

Front Panel LEDs (D & F always ON), C (On while Receiving)

Voltages : J105 (2.5v), J104 (3.3c), J107(1.2v) – all OK

Did not found any other LED on motherboard ON except D202

 

Thanks,

Ayaz

 

From: Ayaz Mahmud
Sent: Thursday, August 2, 2018 11:44 AM
To: address@hidden
Subject: [Discuss-gnuradio] USRP N200 issues and fault troubleshooting

 

Hello,

 

1. “uhd_usrp_probe” (attached) gives the attached output, where I see the Antennas & Sensors field are showing blank. Is this normal (N200) ? Because for other devices I am using like B210 it shows the Antenna names.

 

2. For testing purpose if I run the below command which gives error in antenna naming. But if I skip the (-A RX2) it runs without any error.

 

“uhd_fft –args “addr=192.168.10.2” -A RX2 -s 10e6 -g 10 -f 100e6”

 

Traceback (most recent call last):

  File "/usr/local/bin/uhd_fft", line 448, in <module>

    main()

  File "/usr/local/bin/uhd_fft", line 431, in main

    tb = uhd_fft(args)

  File "/usr/local/bin/uhd_fft", line 128, in __init__

    self.setup_usrp(uhd.usrp_source, args)

  File "/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_app.py", line 156, in setup_usrp

    self.vprint("[ERROR] {} is not a valid antenna name for this USRP device!".format(ant))

NameError: global name 'ant' is not defined

 

3. To make sure if the receiver is working or not, I have designed a flow graph for fm radio. I can get a clear signal in my B210 device, but at the same configuration it just noise in N200.

 

What should be my next step to troubleshoot ? Or how can I be sure that it is a faulty device?

 

Thanks

Ayaz

 

 

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