# QA403 as a Continuous Source

**URL:** <https://forum.quantasylum.com/t/qa403-as-a-continuous-source/1694>\
**Category:** Uncategorized\
**Created:** [January 22, 2025, 7:16pm UTC](https://forum.quantasylum.com/t/qa403-as-a-continuous-source/1694 "2025-01-22T19:16:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MTarr](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@MTarr](https://forum.quantasylum.com/u/MTarr)\
**Post date:** [January 22, 2025, 7:16pm UTC](https://forum.quantasylum.com/t/qa403-as-a-continuous-source/1694/1 "2025-01-22T19:16:49Z")

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Hi,  
I’d like to have a mode where the QA403 puts out a continuous tone. It is not necessary to make any measurements in this mode, just output frequency and level as selected by user.  
This would allow the QA403 to be used for debug where a continuous tone is best for viewing on a 'scope, dvm, etc. At present, I have to switch to a function generator for debug, and then back when it’s time to test the changes.  
It seems like this should be simple to implement, but I could be wrong about that…  
Thank you,  
Morty

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**Author:** ![Claudio](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@Claudio](https://forum.quantasylum.com/u/Claudio)\
**Post date:** [January 22, 2025, 9:49pm UTC](https://forum.quantasylum.com/t/qa403-as-a-continuous-source/1694/2 "2025-01-22T21:49:44Z")

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> [@MTarr](#):
>
> I’d like to have a mode where the QA403 puts out a continuous tone. It is not necessary to make any measurements in this mode, just output frequency and level as selected by user.  
> This would allow the QA403 to be used for debug where a continuous tone is best for viewing on a 'scope, dvm, etc. At present, I have to switch to a function generator for debug, and then back when it’s time to test the changes.  
> It seems like this should be simple to implement, but I could be wrong about that…

Hi @MTarr. I think it is enough to press the “IDLE” button after activating GEN1 at the desired frequency and amplitude to get a continuous tone at the output of QA403

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**Author:** ![MTarr](https://avatars.discourse-cdn.com/v4/letter/m/5daacb/32.png) [@MTarr](https://forum.quantasylum.com/u/MTarr)\
**Post date:** [January 26, 2025, 5:57pm UTC](https://forum.quantasylum.com/t/qa403-as-a-continuous-source/1694/3 "2025-01-26T17:57:19Z")

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Thank you, I didn’t know about that.  
-Morty