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<mailto:ayazmah...@hotmail.com>
Sent: Thursday, August 2, 2018 11:44 AM
To: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org>
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.



  1.  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


  1.  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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