RF exposure calculation

FCC ID: RYD-IHCTB627CW

RF Exposure Info

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FCCID_3264581

Dongguan Nore Testing Center Co., Ltd.
Report No.: NTC1701014FV01
FCC ID: RYD-IHCTB627CW

RF EXPOSURE EVALUATION

EUT Specification
EUT WIRELESS HOME MUSIC SYSTEM
Frequency band WLAN: 2.403GHz ~ 2.475GHz
(Operating) WLAN: 5.18GHz ~ 5.32GHz / 5.50GHz ~ 5.70GHz
WLAN: 5.745GHz ~ 5.825GHz
Others(Bluetooth: 2.402GHz ~ 2.480GHz)
Device category Portable (<20cm separation)
Mobile (>20cm separation)
Others ___
Antenna diversity Single antenna
Multiple antennas
Tx diversity
Rx diversity
Tx/Rx diversity
Max. output power -5.96dBm(0.25mW)
Antenna gain 0dBi
Evaluation applied MPE Evaluation
SAR Evaluation

Limits for Maximum Permissible Exposure (MPE)

Frequency Electric Field Magnetic Field Power Average Time
2
Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm )
(A) Limits for Occupational/Control Exposures
300-1500 -- -- F/300 6
1500-100000 -- -- 5 6
(B) Limits for General Population/Uncontrol Exposures
300-1500 -- -- F/1500 6
1500-100000 -- -- 1 30

$Dongguan Nore Testing Center Co., Ltd. Report No.: NTC1701014FV01 FCC ID: RYD-IHCTB627CW Friis transmission formula: Pd=(Pout*G)\(4*pi*R2) Where Pd= Power density in mW/cm2 Pout=output power to antenna in Mw G= gain of antenna in linear scale Pi=3.1416 R= distance between observation point and center of the radiator in cm Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. Measurement Result Channel Channel Max Tolerance Max Power Power Frequency Output Tune-UP density at density (MHz) power power 20cm (mW/ Limits (dBm) (mW) cm2 ) (mW/cm2 ) Test mode: GFSK Low 2402 -5.96 ±0.1 0.26 5.16e-5 1 Middle 2441 -6.51 ±0.1 0.23 4.55e-5 1 High 2480 -6.46 ±0.1 0.23 4.60e-5 1 Test mode: π/4-DQPSK Low 2402 -7.44 ±0.1 0.18 3.67e-5 1 Middle 2441 -7.96 ±0.1 0.16 3.26e-5 1 High 2480 -7.92 ±0.1 0.17 3.29e-5 1 Test mode: 8DPSK Low 2402 -6.92 ±0.1 0.21 4.14e-5 1 Middle 2441 -7.45 ±0.1 0.18 3.66e-5 1 High 2480 -7.40 ±0.1 0.19 3.70e-5 1 According to KDB447498 D01 V06, no simultaneous SAR measurement is required.$

Document Created: 2017-01-19 10:29:00
Document Modified: 2017-01-19 10:29:00