# Trigger when signal stays high

**URL:** <https://discuss.saleae.com/t/trigger-when-signal-stays-high/3607>\
**Category:** Logic 2 Software\
**Created:** [January 9, 2026, 9:17pm UTC](https://discuss.saleae.com/t/trigger-when-signal-stays-high/3607 "2026-01-09T21:17:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rob](https://avatars.discourse-cdn.com/v4/letter/r/838e76/32.png) [@Rob](https://discuss.saleae.com/u/Rob)\
**Post date:** [January 9, 2026, 9:17pm UTC](https://discuss.saleae.com/t/trigger-when-signal-stays-high/3607/1 "2026-01-09T21:17:39Z")

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I’m using Logic 2 v2.4.40.

I want to trigger when a signal stops and stays high. It seems like this should be easy, but I can’t figure out how.

Suggestions?

Thanks,

-Rob

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**Author:** ![BitBob](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.saleae.com/bitbob/32/2292_2.png) [@BitBob](https://discuss.saleae.com/u/BitBob)\
**Post date:** [January 11, 2026, 11:00pm UTC](https://discuss.saleae.com/t/trigger-when-signal-stays-high/3607/2 "2026-01-11T23:00:57Z")

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Given your trigger criteria:

> [@Rob](#):
>
> I want to trigger when a signal stops and stays high.

See the existing idea (and vote for it) here:

> **[Trigger on signal state](https://ideas.saleae.com/b/feature-requests/trigg-on-signal-state-low-high-after-x-time/)**
>
> Hardware logic analyzers have the option to trigger on a logic state being stuck for a certain period of time either low or high.  
> 
> Currently Logic 2 supports "Pulse Trigger" which you need to specify both the minimum and maximum time before it

… as well as a clever work around using using the [software glitch filter](https://support.saleae.com/product/user-guide/using-logic/software-glitch-filter).

**TL;DR –**

On the **trigger source channel** :

- Set the **glitch filter** to the **maximum idle time** to wait before triggering  
(i.e., **minimum time without an edge** on the trigger channel)
- Set [Capture Mode](https://support.saleae.com/product/user-guide/using-logic/capture-modes) to either:
  - **Trigger Mode : _Rising_ Edge**  
(for a signal that idles **high** ), _ **OR** _
  - **Trigger Mode : _Falling_ Edge**  
(for a signal that idles **low** )

Note: see above link for more details on the work around, including the technical limitations.

Also, you might want **two channels connected to same signal** , to both: (1) trigger on idle high (or on idle low) and (2) see all the signal edges w/o a glitch filter.