# Next saleae?

**URL:** <https://discuss.saleae.com/t/next-saleae/2742>\
**Category:** Uncategorized\
**Created:** [February 23, 2024, 10:38pm UTC](https://discuss.saleae.com/t/next-saleae/2742 "2024-02-23T22:38:56Z")\
**Posts on this page:** 1\
**Showing post:** 8

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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:** [May 26, 2025, 12:27pm UTC](https://discuss.saleae.com/t/next-saleae/2742/8 "2025-05-26T12:27:48Z")

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> [@Kai](#):
>
> On the hardware side, the biggest surprise I’ve had has been the sampling speed dependent analog filtering. Either make it a fixed filter (equivalent to the max speed), or a number of predefined selectable filters.

On this point, see:

> [@Saleae Logic2 Analog filtering technical details?](https://discuss.saleae.com/t/saleae-logic2-analog-filtering-technical-details/2427):
>
> I am trying to understand the technical limitations of Saleae Logic’s analog inputs. I am aware of the support articles: “In addition to the hardware AA filter, there is a digital-analog filter that engages for sample rates lower than the advertised sample rate. This is called the decimation filter. It will filter the data further before down sampling so data sampled at lower rates does not suffer from aliasing from frequency components that made it through the analog AA filter.” “To accu…

… as there is a work around to disable the analog filtering by tweaking the calibration file. Some known issues with this are:

1. It is an ‘unsupported’ hack vs. built-in feature
2. It requires command-line tools or manual text editing vs. GUI based  
(I’ve toyed around with a Tkinter GUI for this while learning python/Tkinter, but not sure anyone else would be interested in it)
3. The synchronization between analog & digital timing might be slightly off w/o additional tweaking

But, if you want to try, see the thread linked above for details and script to hack your calibration file. Let me know if it works, or if anyone would like the Tkinter GUI, and I could put it up on GitHub for people to try it out (still a rough experimental hack right now vs. a polished program).

**[Edit]**  
Finally, if you want to support the idea/feature request to do this all natively in Logic 2 software, please up vote this post:

> **[Upvoty](https://ideas.saleae.com/b/feature-requests/improve-high-frequency-analog-performance-at-lower-sample-frequencies)**

It will at least register customer demand, but activity to actually work on it is depending on Saleae’s own priorities and software dev team’s ‘bandwidth’ – I’m confident that the higher priority items will (eventually) get attention, but the ‘group delay’ is larger than anticipated 😜

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