Questions tagged [fcc]

is the Federal Communications Commission and regulates the RF spectrum, broadband and public safety.

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EMI standards just for power on/off

I know the FCC has EMI/EMC maximums for connected emissions into the AC power cable while electronics are on. But, are there FCC requirements on the brief connected emissions/bursts when the ...
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What sort of testing goes into satisfying the CE Low Voltage Directive?

I am designing a product that uses a third party 120/240 volt power supply that has been CE and FCC rated by its manufacturer. The rest of my system is operating at 12 volts DC. I will have some hand ...
2 votes
1 answer
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How to prove ROHS compliance of a component

I emailed the supplier of an OLED panel that comes mounted on a PCB that contains the driver circuitry, and they claim the part is ROHS compliant. I will be using this component in a system that I ...
1 vote
2 answers
95 views

Is a system powered by an FCC-compliant power supply FCC-compliant if the rest of the system doesn't require compliance?

As I understand it, AC/DC SMPS power supplies and unintentional radiators (anything with a chip clocked at a speed of more than 9 kHz) must be FCC compliant. I am preparing a device which uses an FCC-...
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FCC reguation for PCB in case of daughter board is FCC compliant

I am working on a project that uses the ESP32 WROOM module which is FCC compliant. I wonder if the FCC compliance gets void if new components are added to the module via a PCB. From my understanding, ...
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2 answers
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What are the FCC rules on taking a wifi-system out of its current packaging and putting it inside another unit?

I have a wifi module (Advantech WISE-4220) shown in this datasheet. If I remove the outer plastic casing and put the chip/antenna, unmodified, into another plastic case, am I breaking any FCC ...
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How to prepare my firmware for FCC Part 15 testing

I have a device for which I want to do FCC Part 15 testing - unintentional radiation. (It includes an ESP WROOM Wifi/Bluetooth module with modular approval). This device connects to wifi every 20 ...
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1 answer
55 views

How do you build a spurious emissions test rig?

Naively, it seems like you could test for spurious emissions by: Placing the device-under-test (DUT) in a grounded metal box with a broadband antenna inside. Hook the antenna's coax cable to the S21 ...
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Is it POSSIBLE for a wireless device to use the cellular frequencies without approval from the FCC

My question is purely hypothetical and does NOT apply to any real life scenarios. Is it possible for a wireless device to use the cellular quad band successfully without FCC approval or knowledge.
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Where is the third antenna on this avalanche beacon PCB?

I have been looking at the pictures of the internal circuitry of a Barryvox S avalanche beacon on the FCC ID website. I cannot open mine, since that would void the warranty. This beacon, as all modern ...
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Why EIRP has denominator factor 30 in the formula?

I am calculating the EIRP using FCC guidelines. I came across the formula in the FCC guidelines that has a denominator value of 30. That is, EIRP = (E x d)^2/30. Can anyone explain what 30 is and ...
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Spurious measurements FCC

I was wondering if someone can help me with a project at work. I am very very new into RF. I work for an EMC/EMI lab and we want to do some spurious emissions testing and establish a test procedure ...
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4 answers
138 views

FCC testing for boards with programmable firmware

I'm curious how FCC conformity testing is done on PCBs that contain devices with programmable firmware. Specifically, boards that are designed to allow the end-user to reprogram the firmware (such as ...
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2 answers
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Simulation tools for FCC SDoC testing

For as expensive as FCC-conformity lab testing costs, I am curious if there are any simulation tools that could help in producing an approximation of what a lab test would find, given a PCB design. ...
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347 views

How to connect a display with MIPI DSI connector X to a board with connector Y?

I want to connect a touchscren display to a development board via MIPI DSI interface, but their connectors do not match. The display uses a 30-pin FCC, 1mm pitch, double-side contacts connector (link ...
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FCC Complaince & Removable Bluetooth Antennas

We are developing a product that will hopefully soon be sold internationally and will therefore be put through FCC & CE Certification testing. Part of that design is an audio mixer with an ...
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FCC certified module in europe

If I have an FCC certified BLE module, can I use it in a product destined for Europe and CE mark the product with no additional (intentional radiator) testing?
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FCC compliance nRF9160 external antenna

We are currently evaluating a nRF9160 for a consumer/industrial product. It does not have a built in antenna for GPS/LTE. There are detailed specs on designing for an external one from Nordic. Now ...
1 vote
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80 views

Need help understanding RF radio parameters

I am experimenting with the SPSGRF-915 RF transceiver, particularly with the different center frequencies. My question mainly revolves around the situation where multiple devices can transmit at the ...
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Which products require EMC certificate?

What are the guidlines (or where can I find them) for which products require EMC testing certificate? I know that this determined per country, so for starters let's go with the US. My product contains ...
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Does my Wireless Charging PCB need to have FCC, UL, CSA, certified marks?

I have a simple 5W output wireless charging device that uses a tx coil to transfer power to a phone, this is powered from a 1800mAh battery. Do I need any certifications for this?
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Are IEC 60601-1-2 medical emc and FCC compatible?

I must comply with the medical EMC standard IEC 60601-1-2 but wireless modules do not come certified to this standard. For example, telit fn980 is certified to FCC, RED, etc. Are FCC certified devices ...
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If all parts in a product are FCC or CE certified then do i still need to apply for certification for the complete product?

I am building a CNC product and all the electronics parts we are using are either FCC or CE certified. Do I then have to obtain a separate certification for the product as a whole ? Also any idea what ...
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Bluetooth and Wifi Maximum Power limt

I saw below Bluetooth chip comparison of many module , most of all are having 8dbm max power , what I know FCC has 30dbm and CE has 20dbm Max power limit so why Bluetooth module are limited to only ...
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FCC rules for wideband / spread spectrum devices

I'd like to clarify how the FCC measures power in a frequency band (both for intentional and unintentional radiators). There are devices which either frequency hop (output is a sine wave, but center ...
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2 answers
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Why are radiated emissions standards for consumer electronics different from industrial?

Why are radiated emissions standards for consumer electronics different from industrial? Source:??
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Is EMI/EMC still a big concern for a PC case?

I've recently started looking into researching potential concerns when it comes to using a non-metal material for a custom PC case, specifically wood. I've seen people talk about heat, electrical ...
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3 answers
77 views

Are external data connections considered "unintentional radiation" by the FCC?

Does a device with an external communication port of some kind fall under "intentional radiation" or "unintentional radiation" according to the FCC for testing and certification ...
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1 vote
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Is EMC (FCC and EU) testing performed as sold or as used?

I have a prototype that inserts a fairly weak ISM band RF signal (HF/VHF) as a way of detecting a connection between two metal objects without there being a DC return path (Ideally I would use TDR but ...
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1 answer
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Does using an antenna extension cable violate FCC cert?

I have a question about FCC part 15 certs. Using the Particle Cellular B series SoM, they have a "Grant of equipment authorization" to use the module as an end device. Link to the module docs below. ...
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1 answer
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CE/FCC/RoHS/etc certification for Intel NUC and other barebone MiniPCs?

Intel sell the Intel NUC without a hard drive or ram. They provide a list of compatible rams and drives. By sliding in the ram stick and drive, am I not invalidating all of the certificates on the ...
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3 votes
1 answer
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Is there any country where the 868 MHz or 915 MHz ISM band cannot be used?

The product I am working on (Electronic Shelf Label) uses the 915 MHz radio frequency band and is currently being deployed in Asia. I am gathering the list of countries that the 915 MHz frequency is ...
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3 votes
1 answer
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Building a UHF RFID Reader, FCC regulations?

I've been working on a project that involves tiny UHF transponders (ex. OMNI-ID Fit 220) that fit into a product with very limited space. We wanted to build our own reader (5 or 6 of them) because it'...
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1 vote
1 answer
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Maximum transmit power allowed for 802.11g

I'm learning about the 802.11 regs. In a book I'm using, "CCNA Wireless 200-355 Official Cert Guide (Certification Guide) 1st Edition by, David Hucaby (Author). Page 53", it has the following clause ...
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1 answer
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FCC / CE requirements for adapter pcb?

A product consisting (electronically) just of a PCB with a male USB-C one one side, 5mm of traces and a female USB-C on the other end. No other components at all. To be used as consumer device. How ...
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1 answer
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Can the Olimex ESP32-EVB be used in a commercial application?

My friend and I are very near a final product design, but we currently are using an Olimex ESP32-EVB relay module as part of the final system. Recently we were told by a consultant that the FCC could ...
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1 answer
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FCC/ETSI conformance with backscatter

Do passive backscatter devices fall under regulations of FCC/ETSI? Suppose a system emits a 4W EIRP tone in the ISM band (conforming to FCC/ETSI regulations). A fully passive device backscatters data ...
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2 votes
1 answer
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Do I need to recertify a product if I add a DC to DC converter?

I have a product that has been FCC verified as an unintentional radiator, I have fixed a problem with the power that required a DC to DC converter that operates in the 100kHz to 300kHz range (added to ...
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4 votes
1 answer
885 views

Self Certifying for FCC testing

I have been tasked by my current employer to look into the costs of self certifying. With past companies I have worked for, all of the tests were at a 3rd party lab. The closest thing I have seen to ...
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1 vote
2 answers
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FCC certified module with uncertified antenna: technical or legal issue?

Say I have a consumer device that uses a pre-certified WiFi module. As I understand it, radio modules are certified with a fixed set of antenna choices that were included as part of the module's ...
0 votes
1 answer
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Pi Filter Option

I put a (C-L-C) Pi Filter in series with my antenna trace on a new design, like so: source The reason you put one of these circuits in, as I understand it, is just in case, during compliance ...
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ESP32 FCC Certification

I want to build an esp32 device using the esp32-pico-d4 chip that I will sell to hobbyists. However, I recently came across something called the FCC. It requires radio devices to get certified which ...
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FCC EIRP test results different than other countries

We have an issue with regulatory testing where our lab reported EIRP varies significantly between separate labs who have tested for FCC and another country. The test methods are quite different. The ...
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4 votes
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Why are "devices utilized exclusively in any transportation vehicle" exempted from FCC compliance testing?

I was researching whether do we need to do FCC compliance testing for a device we developed for a client. Curiously, it seems to be in the list of exemptions (passage taken from here): A digital ...
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Can we install product above FCC test power level declared in certification report

we have a product which has radio of 1W maximum output power , we have sent product for FCC through party lab, and they certified the product with 18 dbm only. So we get the certificate with only 18 ...
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Viable alternative for expensive MLCC capacitor?

I'm thinking of building and selling a product which uses a DC-DC isolator. I've been prototyping with Recom RI3 3W Isolated DC-DC Converter Through Hole, Vin 5 V dc, Vout 9V dc, I/O isolation 1kV. ...
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Simplest option for generating audio tones?

I'm looking for the simplest way to generate audio tones. Something like a square or sine wave, but I want multiple tone options. For example, two quick beeps, one at 440Hz, one at 1Khz. The tones ...
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3 answers
201 views

Disable RC oscillator in ATmega328 for FCC compliance

With respect to the topic below, I was trying to find where in the AVR documentation does it say the 8 MHz RC internal oscillator is "disabled" when CKSEL is selected to a different source? I am ...
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EN 300 328 CE radio certification with power limit

We have developed product for Malesia country, where we need local SIRIM certificate. RF module we used in our product is 2.4Ghz wifi mesh, with max 30dbm (1 watt) output power capacity. To get ...
2 votes
1 answer
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Wifi/BT on Realtek 8723 - Is FCC, CE certification needed for Wifi if we disable Wifi and use only Bluetooth?

I'm planning on importing a generic mini pc that comes with an onboard Realtek 8723 for Wifi and Bluetooth. We will need to get it FCC, CE, IC certified before we sell it in North America/EU. Getting ...