RF Exposure

FCC ID: Z7RB23

RF Exposure Info

Download: PDF

FCCID_2915610

FCC ID : Z7RB23

1. RF EXPOSURE

1.1.The Requirement
System 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 levels in excess
of the Commission’s guidelines. See Section 15.247(b)(4) and Section 1.1307(b)(1)

1.2.Limit For Maximum Permissible Exposure (MPE)

Limits for General Population/ Uncontrolled Exposure
Power Density Averaging Time
Frequency Electric Field Magnetic Field
(S) 2 2
Range Strength (E) Strength (H) E ,H or S
2
(MHz) (V/m) (A/m) ( mW/cm )
(minutes)
0.3-1.34 614 1.63 (100)* 30
1.34-30 824/f 2.19/f (180/f)* 30
30-300 27.5 0.073 0.2 30
300-1500 f/1500 30
1500-100,000 1.0 30

F = frequency in MHz, * Plane-wave equivalent power density

1.3.MPE Calculation Method
Predication of MPE limit at a given distance
Equation from page 18 of OET Bulletin 65, Edition 97-01

S=PG/4πR²

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

From the peak EUT RF output power, the minimum mobile separation distance,
d=0.2m, as well as the gain of the antenna is 0 dBi, the RF power density can be
obtained.

1.4.TEST RESULTS
Maximum measured transmitter power

For BT 4.0 LE

GFSK mode

Test Minimum Target Power Power
Output Output Antenna
Frequency Separation power Density Density Test
Power Power Gain
Distance (dBm) Limit At 20 cm Results
（MHz） (dBm) (mW) (Numeric)
(cm) (mW/cm2) (mW/cm2)
2402 20.00 -1.77 0.665 -1 ±1 1.000 1.000 0.0002 Pass
2440 20.00 -1.40 0.724 -1 ±1 1.000 1.000 0.0002 Pass
2480 20.00 -1.12 0.773 -1 ±1 1.000 1.000 0.0002 Pass

For BT classic mode

GFSK mode

Test Minimum Target Power Power
Output Output Antenna
Frequency Separation power Density Density Test
Power Power Gain
Distance (dBm) Limit At 20 cm Results
（MHz） (dBm) (mW) (Numeric)
(cm) (mW/cm ) (mW/cm2)
2

2402 20.00 4.18 2.618 4 ±1 1.000 1.000 0.0006 Pass
2441 20.00 4.10 2.570 4 ±1 1.000 1.000 0.0006 Pass
2480 20.00 4.04 2.535 4 ±1 1.000 1.000 0.0006 Pass

∏/4-DQPSK Mode

Test Minimum Target Power Power
Output Output Antenna
Frequency Separation power Density Density Test
Power Power Gain
Distance (dBm) Limit At 20 cm Results
（MHz） (dBm) (mW) (Numeric)
(cm) (mW/cm2) (mW/cm2)
2402 20.00 2.42 1.746 3±1 1.000 1.000 0.0005 Pass
2441 20.00 3.07 2.028 3±1 1.000 1.000 0.0005 Pass
2480 20.00 3.14 2.061 3±1 1.000 1.000 0.0005 Pass

8DPSK Mode

Test Minimum Target Power Power
Output Output Antenna
Frequency Separation power Density Density Test
Power Power Gain
Distance (dBm) Limit At 20 cm Results
（MHz） (dBm) (mW) (Numeric)
(cm) (mW/cm ) (mW/cm2)
2

2402 20.00 2.62 1.828 3±1 1.000 1.000 0.0005 Pass
2441 20.00 3.18 2.080 3±1 1.000 1.000 0.0005 Pass
2480 20.00 3.25 2.113 3±1 1.000 1.000 0.0005 Pass

The measurement results comply with the FCC Limit per 47 CFR 2.1091 for the
uncontrolled RF Exposure.

1.5.FCC Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. In order to avoid the possibility of exceeding the FCC radio
frequency exposure limits, Human proximity to the antenna shall not be less than
20cm(8 inches) during normal operation. Proposed RF exposure safety information to
include in User’s Manual.

Document Created: 2016-02-25 18:05:58
Document Modified: 2016-02-25 18:05:58

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC