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MPE

OKURA USA INC. SPA-WI-PLAY WIRELESS MULTIROOM AUDIO STREAMING 2AM3K-SPA-WI-PLAY 2AM3KSPAWIPLAY s p a wi play

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Document DEVICE REPORTGetApplicationAttachment.html?id=8200393 
FCC §15.247 (i), §2.1091 ­ RF Exposure

FCC ID: 2AM3K-SPA-WI-PLAY
Applied procedures / limit According to FCC §15.247(i) and §1.1307(b)(1), systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess of the Commission's guidelines.

Limits for Occupational / Controlled Exposure

Frequency Range (MHz)

Electric Field Strength (E)
(V/m)

Magnetic Field Strength (H) (A/m)

Power Density (S) (mW/ cm2)

Averaging Time |E|2,|H|2or S
(minutes)

0.3-3.0

614

1.63

(100)*

6

3.0-30

1842 / f

4.89 / f

(900 / f)*

6

30-300

61.4

0.163

1.0

6

300-1500

F/300

6

1500-100,000

5

6

Note:  is frequency in MHz

* = Power density limit is applicable at frequencies greater than 100 MHz

Limits for General Population / Uncontrolled Exposure

Frequency Range (MHz)
0.3-1.34 1.34-30 30-300 300-1500 1500-100,000

Electric Field Strength (E)
(V/m)
614 824/f
27.5

Magnetic Field Strength (H) (A/m)

Power Density (S) (mW/ cm2)

Averaging Time |E|2,|H|2 or S
(minutes)

1.63

(100)*

30

2.19/f

(180/f)*

30

0.073

0.2

30

F/1500

30

1.0

30

Note: f = frequency in MHz * = Plane-wave equivalent power density

MPE PREDICTION Predication of MPE limit at a given distance, Equation from OET Bulletin 65, Edition 97-01
Where: S = power density P = power input to antenna G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna,R=20cm
Test Result of RF Exposure Evaluation

2.4G WIFI
BLE
EDR

Modes& Channel
Freq. (MHz)

Tune up Produce power

Maximu m peak output power (dBm)

Output power
to antenna
(mW)

Antenna Gain
(numeric)

802.11n(H T20)&243
7
GFSK& LCH

14±1 3±1

8DPSK& LCH

3±1

15

31.6228

1.5346 (1.86dBi)

4

2.5119

1.4791 (1.7dBi)

4

2.5119

1.4791 (1.7dBi)

Power Density
(S) (mW/ cm2)

Limit (mW
/ cm2
)

Result

0.0097

1

Pass

0.0007

1

Pass

0.0007

1

Pass

BT+WIFI supported simultaneous transmission: BT+2.4GWIFI: MPE Ratio =0.0097+0.0007
=0.01041, So passed.

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