---
title: "WIZ750SR-100 radiated emissions"
url: "https://maker.wiznet.io/forum/13866"
markdown_url: "https://maker.wiznet.io/forum/13866/md"
type: "Forum topic"
category: "MCU & Boards"
author: "jmiguelg"
created: "2020-06-02T08:43:13+09:00"
last_activity: "2021-04-01T01:00:37+09:00"
language: "en"
views: 583
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# WIZ750SR-100 radiated emissions

## Question

Asked by jmiguelg on 2020-06-02 in MCU & Boards.

Dear all,

We designed a PCB board in which WIZ750SR-100 fits.
While doing an radiated emission test we saw a big spike at 57MHz and its harmonics (114 MHz and 171MHz).

Is something inside the WIZ750SR-100 working at 57MHz?
Regards,

## Replies

### Reply 1 by jmiguelg, 2021-03-31

The emission came from other electronics. Nothing to do with Wiznet

### Reply 2 by rena, 2021-04-01 (in reply to reply 1)

Hi, [@jmiguelg](https://maker.wiznet.io/u/jmiguelg).
Thank you for the feedback.
If you have any other questions, please leave a post on the forum.

---

Source: https://maker.wiznet.io/forum/13866