RF Exposure

FCC ID: ORV-FCCB

RF Exposure Info

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FCCID_1594389

INTERTEK TESTING SERVICES

For Maximum Permissible Exposure (MPE) evaluation of the base unit, the maximum power
density at 20 cm from this mobile transmitter shall be less than the General Population /
Uncontrolled MPE limit in OET Bulletin 65.

1) For the RF4CE Zigbee portion of Base unit of tested model: FCCB, the maximum field
strength measured (FS) was 92.6 dBμV/m. The distance (D) between the antenna and the
equipment under test (EUT) was 3 meters. And the maximum source-based time-averaging
duty factor is 100%. From these data, the exposed power density at a distance (R) of 20cm
from the center of radiation of the antenna can be calculated according to OET Bulletin 65 as
follow:

The radiated power = (FS*D)2 / 30
= 0.546 mW

The radiated (EIRP) source-based time-averaging output power
= (0.546 * 1) mW
= 0.546 mW

The power density at 20 cm from the antenna
= EIRP / 4πR2
= 0.00011 mW cm-2

2) For the DECT portion of Base Unit of tested model: FCCB, the maximum field strength
measured (FS) was 107.1 dBμV/m. The distance (D) between the antenna and the equipment
under test (EUT) was 3 meters. And the maximum source-based time-averaging duty factor in
8 devices operation is 70.8%. From these data, the exposed power density at a distance (R) of
20cm from the center of radiation of the antenna can be calculated according to OET Bulletin
65 as follow:

The radiated power (EIRP) = (FS*D)2 / 30
= 15.39 mW

The radiated (EIRP) source-based time-averaging output power
= (15.39 * 0.708) mW
= 10.89 mW

The power density at 20 cm from the antenna
= EIRP / 4πR2
= 0.0022 mW cm-2

In the frequency range of 1,500 - 100,000MHz, the MPE limit is 1.0 mWcm-2 for general
population and uncontrolled exposure. As the measured power density at 20cm from the
transmitter is lower than the MPE limit, the compliance to the MPE limit can be ensured by
indicating the minimum 20cm separation between the transmitter's radiating structures and
body of the user or nearby persons.

FCC ID: ORV-FCCB RF Exposure info Page 1 of 2

INTERTEK TESTING SERVICES

The following RF exposure statement is proposed to be included in the user manual:

“ FCC RF Radiation Exposure Statement
Caution: To maintain compliance with the FCC’s RF exposure guidelines, place
the baby unit at least 20cm from nearby persons.”

In addition, for this multiple transmitters and antennas (both DECT & RF4CE portion), the
requirement of Simultaneous Transmission evaluation has also been considered and has
complied with the following conditions of the worse case;

MPE1/Limit1 + MPE2/Limit2 +MPE3/Limit3 ≤ 1

Thus,

0.00011/1 (RF4CE) + 0.0022/1 (Antenna 0 of DECT) + 0.0022/1 (Antenna 1 of DECT)

= 0.00451

It is concluded that no Simultaneous Transmission evaluation is required.

FCC ID: ORV-FCCB RF Exposure info Page 2 of 2

Document Created: 2011-11-28 09:15:17
Document Modified: 2011-11-28 09:15:17

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