[USRP-users] Persistent red LINK LED, streaming samples valued zero

Marcus D. Leech patchvonbraun at gmail.com
Mon Jul 20 11:20:32 EDT 2020

On 07/20/2020 01:52 AM, Hai Nguyen via USRP-users wrote:
> Hello,
> I'm having an error where received samples from RX chains of a X310 
> (after calling recv from the streamer) have values of 0 (both I and 
> Q), and those values don't change over time. One abnormal thing is 
> that the LINK LED in the front panel is persistently red during 
> streaming. I noticed that when streaming samples is ok this LED is 
> normally persistently orange instead.
> Do you have any ideas what would be the cause of this?
> Thank you and best regards,
> Hai
Are you getting any under-run indications?

What sample rate are you using?

Do you see this at the same sample rate with an example application like 
"rx_samples_to_file".   Are you using standard FPGA firmware or do
   you have your own modules in the FPGA?

What version of UHD are you using?

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