Radio Certification FCC 15.247

FCC Part15.207

conducted disturbance

Frequency of emission

(MHz)

Conducted limit (dBμV)

ALL

Equipment powered only by batteries or not powered by AC does not need to be tested

Quasipeak

Average

0.15?C0.5

0.5?C5

5?C30

66 to 56*

56

60

56 to 46*

46

50

FCC Part15.247(a)(1)

Frequency hopping interval

25KHz

or 2/3 frequency hopping 20dB bandwidth

frequency hopping system

Choose the one with the larger frequency between the two limit standards.

FCC Part 15.247(a)(1)

(iii)

Number of channel jumps

At least 15 channels

Frequency hopping system / digital modulation

dwell time

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

FCC Part15.247(b)(1)

maximum conduction

Output Power

0.125 watts

frequency hopping system

FCC Part15.247(b)(3)

1 watt

digital modulation

Also refer to Test Maximum Conducted Output Power

FCC Part15.247(a)(2)

Minimum 6dB bandwidth

At least 500KHz

digital modulation

FCC Part15.215(c)

20 dB bandwidth

Infinite value requirement

frequency hopping system

FCC Part15.247(d)

edge bandwidth

At least 20dB below

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 occupied time

For combined systems with frequency hopping operation , the period in seconds (equal to the number of frequency hopping channels multiplied by 0.4 seconds) cannot exceed 0.4 seconds with direct sequence or digital modulation operation turned off.

Hybrid system combining frequency hopping and digital modulation techniques

A hybrid system working with digital modulation, with frequency hopping turned off, should satisfy

Power density required by fcc Part15.247(d)

FCC Part15.209

Radiation harassment

Frequency (MHz)

limit

(microvolts/meter)

Measure distance

(meters)

ALL

Frequencies below 1G are QP limits

0.009?C0.49

0.490?C1.705

1.705?C30.0

30?C88

88?C216

216?C960

Above 960

2400/F(kHz)

24000/F(kHz)

30

100

150

200

500

300

30

30

3

3

3

3

FCC Part15.249(a)

Radiation field strength

Fundamental field strength

(millivolts/meter)

Harmonic field strength (microvolts/meter)

ALL

This limit is the AV value limit, and the PK value is added 20dB on this basis.

Please refer to FCC PART15.35

50

500