# Pulsating oscillator **URL:** https://forum.quantasylum.com/t/pulsating-oscillator/1875 **Category:** Uncategorized **Created:** [May 16, 2025, 4:53am UTC](https://forum.quantasylum.com/t/pulsating-oscillator/1875 "2025-05-16T04:53:17Z") **Posts on this page:** 1 **Showing post:** 13
### Author: ![restorer-john](https://avatars.discourse-cdn.com/v4/letter/r/b5a626/32.png) [@restorer-john](https://forum.quantasylum.com/u/restorer-john) #### Post date: [May 17, 2025, 7:45am UTC](https://forum.quantasylum.com/t/pulsating-oscillator/1875/13 "2025-05-17T07:45:35Z")
I replied in a thread I was linking for you… > [@The issues with QA403 and 1.183 in terms of usage](https://forum.quantasylum.com/t/the-issues-with-qa403-and-1-183-in-terms-of-usage/981/18): > > Hi @Deadcap, OK, got it. There are two important considerations for each of these: First, FFTs can’t tell you much if the amplitude isn’t mostly constant during the acquisition. So, we need to get to a steady state for a meaningful measurement. Second, in I think all the cases you mention, there is a time required to get to that steady state . And that time isn’t very long. In the case of an amp supply rail sagging, that is usually measured in 10’s of milliseconds (CEA-490 contemplates a 20mS… --- _[View the full topic](https://forum.quantasylum.com/t/pulsating-oscillator/1875)._