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Re: [Discuss-gnuradio] Why is my USRP N210 front panel LED E light blink

From: Nick Foster
Subject: Re: [Discuss-gnuradio] Why is my USRP N210 front panel LED E light blinking rapidly all the time?
Date: Thu, 20 Sep 2012 16:55:07 -0700

It's fine, ignore it. The LED is reflecting the fact that the internal oscillator is unlocked from the reference, which is normal when the device isn't being used. When you initialize it again next time, it'll lock up.


On Thu, Sep 20, 2012 at 4:43 PM, LD Zhang <address@hidden> wrote:

As a new user I have just made the uhd_fft.py to display something. I use the LFRX daughter board for initial testing. I have a concern with the front panel LED E light. While the uhd_fft.py is working, both the LED C and E lights are on solidly which is expected. When shutting off the uhd_fft.py, the two lights went off also. But the LED E light starts to first slowly blink and then to pick up speed in blinking. The E light being the ref lock, I am guessing the rx board doesn't like not having a ref? It got really annoying watching the fast blinking light. I fear that this might not be good for the overall health of the system. The only to cure this seem to be power cycle, which is not preferred. What should I do to prevent this or to ensure that everything is working correctly and there is no system complaints?


LD Zhang

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