# Polarity Measurement in Tractor

**URL:** <https://forum.quantasylum.com/t/polarity-measurement-in-tractor/778>\
**Category:** Tractor\
**Created:** [January 3, 2023, 4:44pm UTC](https://forum.quantasylum.com/t/polarity-measurement-in-tractor/778 "2023-01-03T16:44:22Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![passmedien](https://avatars.discourse-cdn.com/v4/letter/p/fbc32d/32.png) [@passmedien](https://forum.quantasylum.com/u/passmedien)\
**Post date:** [January 3, 2023, 4:44pm UTC](https://forum.quantasylum.com/t/polarity-measurement-in-tractor/778/1 "2023-01-03T16:44:22Z")

</div>

I like to do a polarity measurement of a multichannel amp with tractor to be sure all cabeling is right.  
Is there a way to perform this measurement?  
Thanks

---

<div class="post-metadata">

**Author:** ![matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@matt](https://forum.quantasylum.com/u/matt)\
**Post date:** [January 5, 2023, 12:05am UTC](https://forum.quantasylum.com/t/polarity-measurement-in-tractor/778/2 "2023-01-05T00:05:33Z")

</div>

> [@passmedien](#):
>
> rity measurement of a multichannel amp with tractor to be sure all cabeling is right.  
> Is there a way to perform this measurement?

Hi @passmedien, you should be able to do this in Tractor Mic test. This will do a sweep and compare it to a reference channel (right channel). This is outlined at the link below. But I think there should be a more direct test where you play a single cycle of a waveform, and from that learn if in-phase or out-of-phase. What HW are you working on?

> **[Mic Testing with the QA401](https://quantasylum.com/blogs/news/mic-testing)**
>
> Last week a post on the forum showed how to make an automated test for microphones that runs in Tractor. Recall Tractor is the standalone program that

---

<div class="post-metadata">

**Author:** ![passmedien](https://avatars.discourse-cdn.com/v4/letter/p/fbc32d/32.png) [@passmedien](https://forum.quantasylum.com/u/passmedien)\
**Post date:** [January 10, 2023, 10:45pm UTC](https://forum.quantasylum.com/t/polarity-measurement-in-tractor/778/3 "2023-01-10T22:45:07Z")

</div>

Hi @matt . I try to do it with Mic Testing but didn´t get ist runing.  
I´m using a QA402 and I´m able to see the polarity in the time domain. But it would be great to automate the test

---

<div class="post-metadata">

**Author:** ![passmedien](https://avatars.discourse-cdn.com/v4/letter/p/fbc32d/32.png) [@passmedien](https://forum.quantasylum.com/u/passmedien)\
**Post date:** [March 3, 2024, 3:34pm UTC](https://forum.quantasylum.com/t/polarity-measurement-in-tractor/778/4 "2024-03-03T15:34:43Z")

</div>

Hi @matt do you have any other idea for polarity testing in Tractor?  
Testing the Phase is not a good solution because I need the right channel.  
Could you als define a mask in the time domain?