# Time-domain waterfall (as in webSDR)

**URL:** <https://www.ruby-forum.com/t/time-domain-waterfall-as-in-websdr/246146>\
**Category:** GNU Radio\
**Created:** [September 4, 2013, 4:39am UTC](https://www.ruby-forum.com/t/time-domain-waterfall-as-in-websdr/246146 "2013-09-04T04:39:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [September 4, 2013, 4:39am UTC](https://www.ruby-forum.com/t/time-domain-waterfall-as-in-websdr/246146/1 "2013-09-04T04:39:24Z")

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does anybody know how to replicate Pieter’s work in webSDR producing a  
time-domain waterfall?

the waterfall i’m using now is WX GUI Waterfall Sink and it works  
beautifully but is basically a frequency-domain/power waterfall right?

i’m new to GRC so perhaps my understanding of the Sink above is  
incorrect  
(plz correct me if i’m wrong) … perhaps someone can explain the  
differences between Pieter’s frequency-vs-time waterfall and the Sink  
above?

sam/kg4g-go

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**Author:** ![Salvatore\_M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b782af/32.png) [@Salvatore\_M](https://www.ruby-forum.com/u/Salvatore_M)\
**Post date:** [September 4, 2013, 4:45am UTC](https://www.ruby-forum.com/t/time-domain-waterfall-as-in-websdr/246146/2 "2013-09-04T04:45:49Z")

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On 09/03/2013 10:38 PM, Salvatore M. wrote:

> sam/kg4g-go
> 
> * * *
> 
> Discuss-gnuradio mailing list  
> [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)  
> In the Gnu Radio waterfall sink, the Y axis is time, the X axis is  
> frequency, and the Z axis (colour) is power level.

That seems identical to what they do on WebSDR