# QA403 THD only goes up to 8kHz even with 192 kHz sample rate?

**URL:** https://forum.quantasylum.com/t/qa403-thd-only-goes-up-to-8khz-even-with-192-khz-sample-rate/1013
**Category:** Uncategorized
**Created:** [September 20, 2023, 10:33pm UTC](https://forum.quantasylum.com/t/qa403-thd-only-goes-up-to-8khz-even-with-192-khz-sample-rate/1013 "2023-09-20T22:33:02Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![cgw158](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@cgw158](https://forum.quantasylum.com/u/cgw158)
#### Post date: [September 20, 2023, 10:33pm UTC](https://forum.quantasylum.com/t/qa403-thd-only-goes-up-to-8khz-even-with-192-khz-sample-rate/1013/1 "2023-09-20T22:33:02Z")

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Is there a way to change this? I would very much be interested in reading THD measurements at say 20kHz. I have my sample rate changed to 192kHz so I should be able to measure 3 harmonics of 20kHz at least. I even changed the x-axis scale and stuff. Am I doing something wrong?

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### Author: ![Moto](https://avatars.discourse-cdn.com/v4/letter/m/2bfe46/32.png) [@Moto](https://forum.quantasylum.com/u/Moto)
#### Post date: [September 21, 2023, 1:34am UTC](https://forum.quantasylum.com/t/qa403-thd-only-goes-up-to-8khz-even-with-192-khz-sample-rate/1013/2 "2023-09-21T01:34:29Z")

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Did you try and right click the THD button and set the range there?

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### Author: ![cgw158](https://avatars.discourse-cdn.com/v4/letter/c/977dab/32.png) [@cgw158](https://forum.quantasylum.com/u/cgw158)
#### Post date: [September 21, 2023, 10:45pm UTC](https://forum.quantasylum.com/t/qa403-thd-only-goes-up-to-8khz-even-with-192-khz-sample-rate/1013/3 "2023-09-21T22:45:08Z")

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Ah, yep, that seemed to do the trick. Thanks!