9951_FCC_Exposure

FCC ID: LDKRTBIZ0352

RF Exposure Info

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FCCID_1222590

Cisco Systems Inc EDCS # EDCS-838699

Model Number: CP-9951 series

Excerpt from Australian Radiation Protection Standard

REFERENCE LEVELS FOR TIME AVERAGED EXPOSURE TO
RMS ELECTRIC AND MAGNETIC FIELDS (UNPERTURBED
FIELDS)
Exposure Frequency E-field H-field Equivalent plane
category range strength strength wave power flux
(V/m rms) (A/m rms) density Seq
(W/m2)

Occupational 100 kHz – 1 MHz 614 1.63 / f —
1 MHz – 10 MHz 614 / f 1.63 / f 1000 / f 2 (see note 5)
10 MHz – 400 MHz 61.4 0.163 10 (see note 5)
400 MHz – 2 GHz 3.07 × f 0.5 0.00814 × f 0.5 f/ 40
2 GHz – 300 GHz 137 0.364 50

General public 100 kHz – 150 kHz 86.8 4.86 —
150 kHz – 1 MHz 86.8 0.729 / f —
1 MHz – 10 MHz 86.8 / f 0.5 0.729 / f —
10 MHz – 400 MHz 27.4 0.0729 2 (see note 6)
f/
400 MHz – 2 GHz 1.37 × f 0.5 0.00364 × f 0.5
200
2 GHz – 300 GHz 61.4 0.163 10

5.0 Calculations
Given

E= (30*P*G)/d

Where E = field strength in Volts per meter
P = Power in Watts
G = Antenna Gain in dBi
D = distance in cm

This report shall not be reproduced except in full without written permission by Cisco Systems Inc
4.

Cisco Systems Inc EDCS # EDCS-838699

Model Number: CP-9951 series

Changing units of power to mW and meters to cm

P = mW = P (W) /1000 and
d(cm)= 100 *d(m)

Yields

E = 100* (30*(P / 1000*G)/d)
E= 17.32 (P*G)/d

Using the logarithmic formula for power and gain

P(mW) = 10^ ((P +G)/20)/d
G (numeric) = 10^(G (dBi) /10)

6.0 Results

Table 2

Frequency TX Power Antenna Gain Distance mW/cm^2 Limit

2402 MHz 4.63 dBm 0.44 dBi 20cm 0.0006 1mW/m^2

This report shall not be reproduced except in full without written permission by Cisco Systems Inc
5.

Document Created: 2009-12-15 12:19:46
Document Modified: 2009-12-15 12:19:46

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