# Reducing sample rate oscilloscope

**URL:** <https://forum.liquidinstruments.com/t/reducing-sample-rate-oscilloscope/592>\
**Category:** Support & Troubleshooting\
**Created:** [October 19, 2022, 2:48am UTC](https://forum.liquidinstruments.com/t/reducing-sample-rate-oscilloscope/592 "2022-10-19T02:48:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Tim1](https://avatars.discourse-cdn.com/v4/letter/t/b782af/32.png) [@Tim1](https://forum.liquidinstruments.com/u/Tim1)\
**Post date:** [October 19, 2022, 2:48am UTC](https://forum.liquidinstruments.com/t/reducing-sample-rate-oscilloscope/592/1 "2022-10-19T02:48:36Z")

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Hi, I would like to design a FIR-filter for the input signal of the Moku:Go oscilloscope. The problem is that the sample rate of 125MSa/s is too big for the Matlab filter designer. So, can the sample rate be reduced somehow?

Thanks, Tim

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**Author:** ![PaulC](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.liquidinstruments.com/paulc/32/23_2.png) [@PaulC](https://forum.liquidinstruments.com/u/PaulC)\
**Post date:** [October 19, 2022, 6:14pm UTC](https://forum.liquidinstruments.com/t/reducing-sample-rate-oscilloscope/592/2 "2022-10-19T18:14:04Z")

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Hi Tim,

are you using Moku Cloud Compile to implement a MATLAB designed filter ? If so, the input sample rate for the MCC slot is 31.25 MHz. Is that suitable ? If not, you could implement a decimator in MATLAB.

Also, in case you have not noticed, Moku:Go includes a FIR filter box instrument that might be useful for you to filter before the oscilloscope - see attached.

Regards,

Paul.

 ![FIR filter before OSC](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/58d64b1f8c54218ab0eb9d6784bdc1defde28c86.jpeg)