The FCC and Electronics Design<\/h2>\n\n\n
The <\/span>Federal Communications Commission<\/span><\/a> (FCC) was founded in 1934 and acts as a gatekeeper for the radio spectrum. It knows what devices are being used and on what frequencies all over the United States. Why do devices need to be regulated in the first place? To help safeguard against potential interference. The FCC keeps things in check by ensuring that every product meets specific limitations for RF emissions and electromagnetic compatibility.<\/span><\/p>\n\n\n\n Are you a hobbyist?<\/b> If so you can stop reading here. The FCC lets a hobbyist make five devices from a single design without requiring any testing. <\/span>Per section 15.23 of 47 CFR Ch.1<\/span><\/a>:<\/span><\/p>\n\n\n\n \u201c(a) Equipment authorization is not required for devices that are not marketed, are not constructed from a kit, and are built in quantities of five or less for personal use. (b) It is recognized that the individual builder of home-built equipment may not possess the means to perform the measurements for determining compliance with the regulations. In this case, the builder is expected to employ good engineering practices to meet the specified technical standards to the greatest extent practicable.\u201d<\/span><\/p>\n<\/blockquote>\n\n\n\n For startups and professional designers, read on to learn more about FCC compliance for your upcoming electronics project. <\/span><\/p>\n\n\n The FCC requires that electronic devices marketed and sold in the United States meet specific guidelines for electromagnetic compatibility (EMC) and radio-frequency (RF) emissions. The two general test categories are:<\/span><\/p>\n\n\n\n Based on these two test categories, one might assume that you only need to be concerned with the FCC if your device has an RF component. Not so fast. Any electronic device with a clock speed above 8 KHz is going to produce some type of interference or noise. The FCC goes on to define how devices radiate their interference, either intentionally or unintentionally.<\/span><\/p>\n\n\n These devices intentionally emit an RF signal and include all typical wireless modules like WiFi, Bluetooth, Zigbee, etc. These devices have to be tested and certified by the FCC before they can be sold and marketed in the United States.<\/span><\/p>\n\n\n\n These devices unintentionally emit interference\/noise and can include things like switching noise from a power supply, extended clock traces, or antennas created from a sloppy ground pour or a trace stub. While these devices do need to be tested the results don\u2019t need to be sent to the FCC. <\/span><\/p>\n\n\n\n Whether your device is an international or unintentional radiator, you\u2019ll need FCC documentation to support it. This can come in three flavors:<\/span><\/p>\n\n\n\n The testing and certification process for FCC compliance can be costly. The first step to understand your expected investment is to identify whether your device is an unintentional or intentional radiator. Once defined, you then need to decide whether your device requires Verification, Declaration of Conformity, or Certification paperwork. For unintentional radiators, <\/span>Subpart B of Section 15.101 for 47 CFR 15<\/span><\/a> lists the following device types and their required compliance:<\/span><\/p>\n\n\n\n The intentional radiator will require Certification with few exceptions. The testing and certification process for these devices can take anywhere from four to six weeks. We\u2019ve also seen testing centers that took ten months to work on a device. Mileage will vary depending on your product specifications and the responsiveness of your chosen testing lab.<\/span><\/p>\n\n\n\n For costs, you\u2019re looking at anywhere between $8,000 and $20,000 to have a device Certified. Devices that just need Verification or a Declaration of Conformity run between $1,000 and $2,000.<\/span><\/p>\n\n\n\n There\u2019s also the sore subject of non-compliance fees. On July 1, 2016, the FCC raised the fines for products found in violation of its rules. The maximum penalty has risen from $37,500 to $47,350 for each violation of a product or each day that a violation continues to persist. Continuing violations have also risen from $400,000 to $473,402.<\/span><\/p>\n\n\n\n Point being, messing around with FCC violations is serious business and can mean the difference between your product\u2019s success and failure. You can read more about <\/span>increased FCC fines here<\/span><\/a>.<\/span><\/p>\n\n\n If all this information is sounding overwhelming, we have a solution. There\u2019s a type of certification that the FCC offers called <\/span>Modular Certification<\/b>. This basically allows you, as the designer, to purchase wireless modules that are already certified which can be used in your design.<\/span><\/p>\n\n\n\n This is an excellent approach if you want to avoid all of the details, costs, and paperwork associated with FCC emission testing early on in your product\u2019s development. There are a ton of companies that make modules for BLE, WiFi, Zigbee, GSM, and other wireless technologies.<\/span><\/p>\n\n\n\n They all go through the same painstaking process of FCC approval and sell modules that include a chip, balun, antenna, crystal, and shield that can be quickly soldered onto a PCB. When you use one of these certified modules, you won\u2019t have to worry about FCC intentional radiation testing at all.<\/span><\/p>\n\n\n\n We typically see design teams using these modules when they\u2019re planning to produce a low volume product. This allows them to get quickly started with their development process without tying up valuable resources with FCC busywork. Once the product takes off, and the financials are in place then a team often looks into designing their own RF technologies. There are two types of modules to know about:<\/span><\/p>\n\n\n These modules are produced by a manufacturer that has taken all of the steps needed to obtain FCC certification. By using these modules, you\u2019ll get the benefit of FCC compliance, but you\u2019ll also be restricted in your choice of antennas.<\/span><\/p>\n\n\n\n The OEM that produces these modules will work with an EMC testing lab to certify a handful of antennas that will work with the transmitter. This means that as the end user, you\u2019ll need to choose an identical antenna that was used to pass FCC guidelines. Most pre-certified modules will come with an integration manual that outlines how the device can fit into your existing design project.<\/span><\/p>\n\n\n\n When considering a pre-certified module, keep the following in mind:<\/span><\/p>\n\n\n![\"fcc](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/iphone-att1.jpg\")
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What Does the FCC Test?<\/h2>\n\n\n
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Intentional Radiators<\/h3>\n\n\n
![\"intentional](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/fcc-regulatory-overview-22-638.jpg\")
Unintentional Radiators<\/h3>\n\n\n
![\"unintentional](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/fcc-regulatory-overview-22-638-1.jpg\")
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FCC Costs and Fines<\/h2>\n\n\n
![\"verification](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/15.101.gif\")
<\/figure>\n\n\n\nThe Path of Least Resistance for FCC Compliance<\/h2>\n\n\n
![\"pre](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/en.SPWF04-wifi-module-_newsbite-01-01-1024x682.jpg\")
Pre-Certified Modules<\/h3>\n\n\n
![\"fcc](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/fcc-testing-chamber-featured.jpg\")
![\"common](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/0808_ScrambledSignals_F1.gif\")
![\"twisted](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/0808_ScrambledSignals_F3.gif\")
![\"shielding](\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/2023\/07\/Interfence-Technology-Article-Enclosures-Pic-1024x684.jpg\")