# Waveform definition

**URL:** <https://simpeg.discourse.group/t/waveform-definition/641>\
**Category:** Electromagnetics\
**Created:** [December 4, 2024, 10:38am UTC](https://simpeg.discourse.group/t/waveform-definition/641 "2024-12-04T10:38:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![glow](https://avatars.discourse-cdn.com/v4/letter/g/f0a364/32.png) [@glow](https://simpeg.discourse.group/u/glow)\
**Post date:** [December 4, 2024, 10:38am UTC](https://simpeg.discourse.group/t/waveform-definition/641/1 "2024-12-04T10:38:42Z")

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Regarding the emission waveform of this transient electromagnetic, how should I redefine it in Simpeg’s waveform definition? Here are some measured parameters,  
Frequency: 240.0  
TIME\_DELAY: -1.7E-6  
RAMP\_TIME: 4E-6  
RAMP\_TIME\_ON: 0.000145

 ![USF_format_description](https://global.discourse-cdn.com/free1/uploads/simpeg/original/1X/f638f303acdfa1887019c88069f1e3aaf4c8b934.jpeg)