# Feature request: Polarity Test

**URL:** https://forum.quantasylum.com/t/feature-request-polarity-test/2049
**Category:** Uncategorized
**Created:** [September 21, 2025, 10:20am UTC](https://forum.quantasylum.com/t/feature-request-polarity-test/2049 "2025-09-21T10:20:07Z")
**Posts on this page:** 1
**Showing post:** 5

<div class="post-metadata">

### Author: ![tkuzma](https://avatars.discourse-cdn.com/v4/letter/t/ad7895/32.png) [@tkuzma](https://forum.quantasylum.com/u/tkuzma)
#### Post date: [September 24, 2025, 5:13pm UTC](https://forum.quantasylum.com/t/feature-request-polarity-test/2049/5 "2025-09-24T17:13:51Z")

</div>

I made a phase test for Tractor a few months ago if you want to check it out. There’s one for the QA401 and one for the QA403. I think I made one that just does 180 polarity checks against a reference before and after you manually flip the polarity. I’ll have to dig it up if you’re interested in that one as well.

Cheers.

Tom

> [@Tractor Phase Measurement Test](https://forum.quantasylum.com/t/tractor-phase-measurement-test/1659):
>
> Hey all, I’ve seen this topic come up before and I’ve run into several situations in production testing where I needed to measure the phase of of the DUT. Tractor never had this test, so I made my own. You can select the reference channel to be the QA401 output, or the Input of the opposite channel. When using the output as reference, the measurement is just the same as what is shown in the QA401 software. The test is in the “O…

---

_[View the full topic](https://forum.quantasylum.com/t/feature-request-polarity-test/2049)._