# Overrun Signal

**URL:** <https://www.ruby-forum.com/t/overrun-signal/205463>\
**Category:** GNU Radio\
**Created:** [April 7, 2011, 5:39am UTC](https://www.ruby-forum.com/t/overrun-signal/205463 "2011-04-07T05:39:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\
**Post date:** [April 7, 2011, 5:39am UTC](https://www.ruby-forum.com/t/overrun-signal/205463/1 "2011-04-07T05:39:20Z")

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aO is audio overrun, uO is USRP overrun…so what does OOOOOO…  
suggest, a generic overrun?

Presents with the following:

UHD (USRP2) Sample Rate = 20M -\> Rational Resampler at Decimation = 100  
-\> Throttle -\> WX FFT Sample Rate = 200k

Trying to develop a setup with an FFT display for the available spectrum  
to identify active channels and subsequent processing at ~100 kHz to  
demod a channel.

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**Author:** ![ronh](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/bcef8e/32.png) [@ronh](https://www.ruby-forum.com/u/ronh)\
**Post date:** [April 7, 2011, 7:24am UTC](https://www.ruby-forum.com/t/overrun-signal/205463/2 "2011-04-07T07:24:45Z")

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On 04/06/2011 08:37 PM, Ron H. wrote:

> aO is audio overrun, uO is USRP overrun…so what does OOOOOO… suggest, a  
> generic overrun?
> 
> Presents with the following:
> 
> UHD (USRP2) Sample Rate = 20M → Rational Resampler at Decimation = 100 →   
> Throttle → WX FFT Sample Rate = 200k

for usrp2, uhd prints an O when it catches a sequence error due to  
packet loss when the socket buffer is overflowed. BTW, the throttle  
block cant be helping.

-Josh