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2.4GHZ wireless product FCC certification test project interpretation

Edit: ANCI 2021-12-30 79

Article overview: If 2.4GHZ wireless products want to be sold in the North American market, they need to apply for FCC ID. Common products are: wireless mouse, wireless keyboard, etc. Due to factors such as product classification and application technology, different products are also tested for certification Different, today we mainly learn about the content of the FCC certification certification requirements and test standard analysis for this product.

If 2.4GHZ wireless products want to be sold in the North American market, they need to apply for FCC ID. Common products are: wireless mouse, wireless keyboard, etc. Due to factors such as product classification and application technology, the certification tests for different products are also Different, today we mainly learn about the content of the FCC certification certification requirements and test standard analysis for this product.

 

FCC certification standard:
FCC PART 15.207 Conducted limits

FCC PART 15.209 Radiated emission limits

FCC PART 15.215 Additional provisions to the general radiated emission limitations

FCC PART 15.247 Operation within the bands 902–928 MHz, 2400–2483.5 MHz, and 5725–5850 MHz

FCC PART 15.249 Operation within the bands 902–928 MHz, 2400–2483.5 MHz,5725–5875 MHZ, and 24.0–24.25 GHz

 

FCC certification test requirements:
The FCC PART 15 specification specifies the test requirements for products whose operating frequency is within the frequency range of 2.4-2.4835Ghz; the main reference standards are 15.247 and 15.249 (the two are in a parallel relationship, and for small power equipment can use 15.249),

Test Standard Basis

test
project

judgement standard

Modulation

Remark

FCC Part15.207

Conducted
disturbance

Frequency of emission   (MHz)

Conducted limit (dBμV)

ALL

Devices powered only by batteries or not powered by AC do not need to be tested

 

Quasipeak

Average

0.15–0.5

66 to 56*

56 to 46*

0.5–5

56

46

5–30

60

50

FCCPart15.247 (a)(1)

Hopping
interval

25KHz

frequency hopping system

The two limit standards choose the higher frequency and the higher frequency

or 20dB bandwidth with 2/3 frequency hopping

FCC Part 15.247(a)(1)  (iii)


Number of channels to hop

at least 15 channels

Frequency Hopping System / Digital Modulation

 

Dwell
time

Within the period of each carrier frequency (number of frequency hopping channels multiplied by 0.4 seconds), the average occupied time of any frequency shall not exceed 0.4 seconds

 

FCC Part15.247(b)(1)

maximum
conduction

0.125 watts

 

 

FCC Part15.247(b)(3)

output
power

1 watt

digital modulation

Also refer to Test Maximum Conducted Output Power Conducted Output Power

FCC Part15.247(a)(2)

Minimum
6dB bandwidth

At least 500KHz

digital modulation

 

FCC Part15.215©

20 dB 
bandwidth

Unlimited value requirement

frequency hopping system

 

FCC Part15.247(d)

edge
bandwidth

At least below 20dB

Spread Spectrum/Digital Modulation

 

Or: less than 54dBuV (AV), less than 74dBuV (PEAK),

 

FCC Part15.247(e)

power spectral
density

≤8dBm @ 3KHz

digital modulation system

 

FCC Part15.247(f)

average
occupancy
time

The combined system of frequency hopping operation cannot exceed 0.4 seconds in the period calculated in seconds (equal to the number of frequency hopping channels multiplied by 0.4 seconds) when the direct sequence or digital modulation operation is turned off. Should meet the power density required by FCC Part 15.247(d)

Hybrid system combining frequency hopping and digital modulation techniques

 

Hybrid systems operating with digital modulation should meet the power density required by FCC Part 15.247(d) with frequency hopping turned off

FCC Part15.209

Radiation
harassment

Frequency (MHz)

Limit (microvolts/meter)

Measuring distance (meters)

ALL

Frequency below 1G is the QP limit

0.009–0.49

2400/F(kHz)

300

0.490–1.705

24000/F(kHz)

30

1.705–30.0

30

30

30–88

100

3

88–216

150

3

216–960

200

3

Above 960

500

3

FCC Part15.249(a)

Radiated
field strength

Fundamental field strength

Harmonic field strength (microvolts/meter)

ALL

This limit is the limit of AV value, PK value plus 20dB on this basis
can refer to FCC PART15.35

(millivolts/meter)

50

500

See the table below for details:

 

ANCI Reminder
Of course, there are some other parameters such as antenna gain, antenna technical requirements, maximum power, antenna type, etc. that need to be understood in FCC certification. There are various types of 2.4G wireless products currently sold in the North American market, but the FCC test specifications they follow are unified, so the FCC certification of 2.4GHZ wireless products can be carried out according to the requirements of the above table. For specific details, please consult ANCI testing.


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