RF Exposure MPE

FCC ID: PD9533ANM

RF Exposure Info

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FCCID_963602

MPE Calculations
The device is not a portable device (i.e. intended to be worn on the body or be hand-
held), so it is classified as being either a mobile device or a fixed mounted device. The
user’s manual specifies a minimum separation distance of at least 20cm, consistent with
this classification. As shown in the calculations below, the power density 20cm from the
device is below the maximum permitted level for uncontrolled exposure with one or both
radios active.

FCC part 1.1310, Table 1 limits the power density for uncontrolled exposure. The power
density, Pd (mW/cm2 ) calculated from the maximum EIRP, Pt (mW) and the distance, d
(m), between the transmitting antenna and the closest person, can be calculated using:

Pd = Pt /(4 πd2)

MPE Output Max. Distance
EIRP Pd at 20cm
Frequency Limit Power Antenna where Pd =
(mW) (mW/cm2)
(mW/cm2) (mW) Gain (dBi)1 limit (cm)
2412 to
1.00 70.8 3.2 147.9 0.03 3.4
2462 MHz
5180 to
1.00 45.7 5.0 144.5 0.03 3.4
5240 MHz
5260 to
1.00 109.6 5.0 346.7 0.07 5.3
5320 MHz
5500 to
1.00 81.3 5.0 257.0 0.05 4.5
5700 MHz
5745 to
1.00 67.6 5.0 213.8 0.04 4.1
5825 MHz

The highest power density 20cm from the antennas of the module is 0.07 mW/cm2, which
is 7% of the permitted maximum power density.

1
Antenna gain for the 2.4GHz band is the 3.2dBi gain of the Universe antenna. For the 5 GHz bands the
5dBi gain is the gain of the Ethertronics antenna.

Document Created: 2008-06-26 12:17:25
Document Modified: 2008-06-26 12:17:25

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