RF Exposure

FCC ID: SK9ITR24001

RF Exposure Info

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FCCID_1484367

Model: ITR24001 FCC ID: SK9ITR24001 IC: 864G-ITR24001

General Information:
Applicant: Itron Electricity Metering, Inc.
ACS Project: 11-0105
Device Category: Mobile
Environment: General Population/Uncontrolled Exposure

Technical Information:
Antenna Type: WP Wireless P/N: WPANT30005-SA, 2.4 GHz Omni Directional Whip
Maximum Antenna Gain: 3.9dBi
Maximum Transmitter Conducted Power: 22.40dBm, 173.8mW
Maximum System EIRP: 26.30dBm, 426.6mW

MPE Calculation – Standalone Configuration

The Power Density (mW/cm2) is calculated as follows:

PG
S=
4R 2
Where:

S = power density (in appropriate units, e.g. mW/cm2)
P = power input to the antenna (in appropriate units, e.g., mW)
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 (appropriate units, e.g., cm)

Table 1.1: MPE Calculation – Standalone Configuration
MPE Calculator for Mobile Equipment
Limits for General Population/Uncontrolled Exposure*
Transmit Radio Power Radio Antenna Antenna
Distance Power Density
Frequency Power Density Limit Power Gain Gain (mW
(cm) (mW/cm^2)
(MHz) (dBm) (mW/Cm2) (mW) (dBi) eq.)
2437 22.4 1.00 173.78 3.9 2.455 20 0.085

ACS Report: 11-0105.W06.11.A Advanced Compliance Solutions Page 2

Model(s): ITR24001 FCC ID: SK9ITR24001 IC: 864G-ITR24001

MPE Calculation – Collocated Configuration (Itron Prism Cell Relay)

The Power Density (mW/cm2) is calculated as follows:

PG
S=
4R 2
Where:

S = power density (in appropriate units, e.g. mW/cm2)
P = power input to the antenna (in appropriate units, e.g., mW)
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 (appropriate units, e.g., cm)

Technical Information:

Table 1.2: Technical Information – Collocated Configuration (Itron Prism Cell Relay)
900 MHz LAN 802.11b/g/n (EUT) GSM / GPRS Modem CDMA Modem
FCC ID: SK9ITR9002 FCC ID: SK9ITR24001 FCC ID: N7NMC8790 FCC ID: N7N-MC5728
IC:864G-ITR9002 IC:864G-ITR24001 IC:2417C-MC8790 IC:2417C-MC5728

WP Wireless WP Wireless WP Wireless WP Wireless
Antenna P/N: WPANT30003-CB P/N: WPANT30005-SA P/N: WPANT30002-SB P/N: WPANT30002-SB
Type Omni Directional Body- 2.4 GHz Omni Omni Directional Body- Omni Directional Body-
mount Antenna Directional Whip mount mount

Antenna 850 Band: 2.3 dBi 850 Band: 2.3 dBi
1.8 dBi 3.9 dBi
Gain 1900 Band: 3.8 dBi 1900 Band: 3.8 dBi

Conducted 850 Band: 31.8dBm 850 Band: 25.07dBm
27.98dBm 173.8dBm
Power 1900 Band: 28.7dBm 1900 Band: 24.90dBm

Maximum GSM 850: 2.57 W 850 Band: 0.546 W
950.6 mW 426.6 mW
PK EIRP 1900 Band: 1.78 W 1900 Band: 0.741 W

Maximum GSM 850: 1.57 W 850 Band: 0.333 W
579.4 mW 260.0 mW
PK ERP 1900 Band: 1.08 W 1900 Band: 0.452 W

Note: Power provided for CDMA Modem FCC ID: N7N-MC5728 / IC: 2417C-MC5728 is average power as provided in
certification filing for determining MPE compliance.

Source Based Time Averaging GSM / GPRS Modem - FCC ID: N7NMC8790 / IC:2417C-MC8790

The GSM / GPRS Modem FCC ID: N7NMC8790 / IC: 2417C-MC8790 is a Class 12 modem with a 50%
source-based time-averaged duty cycle. The measured power level was reduced by a factor 3dB to account
for the duty cycle. The duty cycle correction factor is determined using the formula: 10log (0.50) = 3dB.

Corrected Level 850 = 31.8 – 3.0 = 28.8dBm
Corrected Level 1900 = 28.7 – 3.0 = 25.7dBm

ACS Report: 11-0105.W06.11.A Advanced Compliance Solutions Page 3

Model(s): ITR24001 FCC ID: SK9ITR24001 IC: 864G-ITR24001

Table 1.3: MPE Calculation – Collocated Configuration (Itron Prism Cell Relay)
MPE Calculator for Mobile Equipment
Limits for General Population/Uncontrolled Exposure*
Transmit Radio Power Density Radio Antenna
Antenna Gain Distance Power Density
Frequency Power Limit Power Gain
(mW eq.) (cm) (mW/cm^2)
(MHz) (dBm) (mW/Cm2) (mW) (dBi)
914.75 27.98 0.61 628.06 1.8 1.514 20 0.189
2437 22.4 1.00 173.78 3.9 2.455 20 0.085
824 (GPRS) 28.8 0.55 758.58 2.3 1.698 20 0.256
1850 (GPRS) 25.7 1.00 371.54 3.8 2.399 20 0.177
824 (CDMA) 25.07 0.55 321.37 2.3 1.698 20 0.109
1850 (CDMA) 24.9 1.00 309.03 3.8 2.399 20 0.147

Summation of Power Densities – Simultaneous Transmissions
This device contains multiple transmitters which can operate simultaneously and therefore the maximum RF
exposure is determined by the summation of power densities. The limit utilized is the lower limit specified for
all simultaneous transmitters. The limit used to show compliance to the 20cm separation distance is
0.55mW/cm^2.

The maximum power density as calculated by a summation of power densities for each simultaneous
transmission combination as follows:

GSM / GPRS Modem Operating in the 800MHz Cellular Band:
900MHz LAN: 0.189 (mW/cm^2)
802.11b/g/n: 0.085 (mW/cm^2)
GSM 850: 0.256 (mW/cm^2)
TOTAL: 0.530 (mW/cm^2)

GSM / GPRS Modem Operating in the 1900MHz PCS Band:
900MHz LAN: 0.189 (mW/cm^2)
802.11b/g/n: 0.085 (mW/cm^2)
GSM 1900: 0.177 (mW/cm^2)
TOTAL: 0.451 (mW/cm^2)

CDMA Modem Operating in the 800MHz Cellular Band:
900MHz LAN: 0.189 (mW/cm^2)
802.11b/g/n: 0.085 (mW/cm^2)
CDMA 850: 0.109 (mW/cm^2)
TOTAL: 0.383 (mW/cm^2)

CDMA Modem Operating in the 1900MHz PCS Band:
900MHz LAN: 0.189 (mW/cm^2)
802.11b/g/n: 0.085 (mW/cm^2)
CDMA 1900: 0.147 (mW/cm^2)
TOTAL: 0.421 (mW/cm^2)

Installation Guidelines
The installation manual should contain text similar to the following advising how to install the equipment to
maintain compliance with the FCC RF exposure requirements:

RF Exposure
In accordance with FCC requirements of human exposure to radio frequency fields, the radiating element shall
be installed such that a minimum separation distance of 20 centimeters will be maintained.

ACS Report: 11-0105.W06.11.A Advanced Compliance Solutions Page 4

Document Created: 2011-04-20 11:47:50
Document Modified: 2011-04-20 11:47:50

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