[USRP-users] link led colour

Marcus Müller marcus.mueller at ettus.com
Tue Mar 12 04:31:35 EDT 2019


Hi Koyel, Wade and Joe,

ah! My bad. I got my X310 out of the cupboard and was so concentrated
on figuring which red LED was meant that I really focused on the back
panel – and forgot there's literally a "LINK" LED on the front of the
USRP. My apologies!

You'll have to do a bit of a deeper dive, but you'll find out that the
LINK indicator basically shines whenever there's rx or tx active, far
as I read db_control.v.

Best regards, and again, my apologies,
Marcus

On Mon, 2019-03-11 at 17:27 -0500, Wade Fife wrote:
> As far as I can tell, the LED color hasn't changed. Page 13 has the
> SFP status LEDs, which show through the panel above the SFPs. These
> are green for link (left, above the SFP) and yellow for activity
> (right, above the SFP).
> 
> Page 14 has the "LINK" LED, which shows through on the opposite end
> of the USRP (next to the RF ports). This one is a RED/GREEN bicolor.
> I think this LED is a combination of the PCIe and Ethernet status.
> Orange is what you get when both RED and GREEN are on at the same
> time. I have an X310 on my desk and this LED varies between red,
> orange, yellow, and green, depending on how the LEDs are flashing.
> 
> I think the behavior Koyel is seeing is expected and just means
> there's data being transferred, assuming Koyel is looking at the LINK
> LED that's next to the RF ports.
> 
> Thanks,
> 
> Wade
> 
> On Thu, Mar 7, 2019 at 7:48 PM Joe Martin via USRP-users <
> usrp-users at lists.ettus.com> wrote:
> > Interestingly, my X310 front panel LED occasionally, very briefly
> > shows red too.  Maybe the schematic isn’t current with what is
> > actually used in the unit these days(?).  
> > 
> > Regards, 
> > 
> > Joe
> > 
> > > On Mar 7, 2019, at 3:36 PM, Marcus Müller via USRP-users <
> > usrp-users at lists.ettus.com> wrote:
> > > 
> > > So that's built on an X3x0 platform. As said, no, the link leds
> > really
> > > just display link status, nothing about the data.
> > > Also, when you look at the schematic of the X300, PDF [1] page
> > 13,
> > > you'll find no red LED – only green and yellow, so I must admit
> > I'm a
> > > bit confused about what you witnessed?
> > > 
> > > Best regards,
> > > Marcus
> > > 
> > > [1] http://files.ettus.com/schematics/x300/x3xx.pdf
> > > On Thu, 2019-03-07 at 09:56 +0000, Koyel Das (Vehere) wrote:
> > >> I am using USRP 2955 R
> > >> 
> > >> Koyel Das                                     
> > >> Senior – Product Engineer
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> > >> From: Marcus Müller <marcus.mueller at ettus.com>
> > >> Sent: Thursday, March 7, 2019 3:21:40 PM
> > >> To: Koyel Das (Vehere); 'USRP-users at lists.ettus.com'
> > >> Subject: Re: [USRP-users] link led colour
> > >> 
> > >> The link LEDs on our USRPs don't indicate validness of data.
> > It's
> > >> highly likely this is normal. What USRP are you using?
> > >> 
> > >> Best regards,
> > >> Marcus
> > >> 
> > >> On Wed, 2019-03-06 at 05:05 +0000, Koyel Das (Vehere) via USRP-
> > users
> > >> wrote:
> > >>> Hi,
> > >>> 
> > >>> When I am receiving data using ethernet my link LED is orange
> > most
> > >> of
> > >>> the times and blinking to red for momentarily, which is not so
> > >>> noticeable. Am I receiving wrong data? It is not turning green.
> > >>> 
> > >>> Regards,
> > >>> Koyel
> > >>> 
> > >>> Koyel Das                                     
> > >>> Senior – Product Engineer
> > >>> Vehere | Proactive Communications Intelligence & Cyber Defence
> > >>> M: +919051132173 | T: +91 33 40545454 | F: +91 33 40545455 |
> > W: 
> > >>> www.vehere.com
> > 
> > 
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