RF Exposure MPE

FCC ID: RI7GE863

RF Exposure Info

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FCCID_690661

U.S. Technologies, Inc . Test Report, FCC Part 24E and Part
22H
Report Number: 06-0008 Issue Date: April 18, 2006
Customer: Sicom test s.r.l.
Model: GE863-QUAD / GE863-QUAD-PY Modular Transmitter

RF EXPOSURE

U.S. Technologies, Inc . Test Report, FCC Part 24E and Part
22H
Report Number: 06-0008 Issue Date: April 18, 2006
Customer: Sicom test s.r.l.
Model: GE863-QUAD / GE863-QUAD-PY Modular Transmitter

5.1 RF Safety Requirements to 2.1091 for Mobile Transmitters

Telit, Inc. calculated the MPE emission values for a GE863 with a maximum
power density when using a 3 dBi antenna for fixed and mobile applications.
They used the formula shown in OET Bulletin 65 and calculated the minimum
distance between antenna and unsuspecting user as 20 cm for both applications.

Power Output

The EUT’s maximum expected output power as shown in Section 2.6 was

824 MHz to 850 MHz Range

Frequency of Measurement Measurement
Fundamental (dBm) (Watt)
(MHz)

824.09 31.12 1.294

835.92 30.29 1.069

848.70 29.99 0.997

The maximum EIRP expected for all installations is with a +3dBi gain
antenna. This would yield a maximum EIRP of 31.12 dBm + 3 dBi = +34.12
dBm.

Therefore the maximum radiated output power (EIRP) is :

Antilog(34.12 dBm/10) = 2582 mW

U.S. Technologies, Inc . Test Report, FCC Part 24E and Part
22H
Report Number: 06-0008 Issue Date: April 18, 2006
Customer: Sicom test s.r.l.
Model: GE863-QUAD / GE863-QUAD-PY Modular Transmitter

MPE Calculations
2
The limits for this unit (uncontrolled exposure) are 0.55 mW/cm . Taking the RF Denisty Field
Equation:
2
S = (EIRP in mW)/(4πR )

Where R = 20 cm
and EIRP = 2582 mW

and π = 3.14159
2
S = 2582/4π20

S = 2582/5026.55
2
S = 0.51 mW/cm

All manual instructions will specify 20 cm all installations.

U.S. Technologies, Inc . Test Report, FCC Part 24E and Part
22H
Report Number: 06-0008 Issue Date: April 18, 2006
Customer: Sicom test s.r.l.
Model: GE863-QUAD / GE863-QUAD-PY Modular Transmitter

1850 MHz to 1910 MHz Range

Frequency of Measurement Measurement
Fundamental (dBm) (Watt)
(MHz)

1.85013 28.54 0.714

1.87990 26.37 0.433

1.90980 27.68 0.586

The maximum EIRP expected for all installations is with a +3dBi gain
antenna. This would yield a maximum EIRP of 28.54 dBm + 3 dBi = +31.54
dBm.

Therefore the maximum radiated output power (EIRP) is :

Antilog(30.68 dBm/10) = 1426 mW

MPE Calculations
2
The limits for this unit (uncontrolled exposure) are 1.0 mW/cm . Taking the RF Denisty Field
Equation:
2
S = (EIRP in mW)/(4πR )

Where R = 20 cm
and EIRP = 21172 mW
and π = 3.14159
2
S = 1426/4π20

S = 1426/5026.55
2
S = 0.28 mW/cm

All manual instructions will specify 20 cm all installations.

U.S. Technologies, Inc . Test Report, FCC Part 24E and Part
22H
Report Number: 06-0008 Issue Date: April 18, 2006
Customer: Sicom test s.r.l.
Model: GE863-QUAD / GE863-QUAD-PY Modular Transmitter

5.2 RF Safety Requirements to 2.1091 (d) for Mobile Transmitters

Maximum output power is 34.12 dBm. (824.09 MHz)

Thje unit features GPRS Class 10 (2 up, 4 down) as described on page 4 of the Technical
manual.

With a total time averaging of 8 packets, the 2 packet upload yields a duty cycle of
2/8 = .25 or 25%.

Using the formula for duty cycle correction = 10 log (0.25) = -6dB, the ERP is calculated as
follows:

ERP = Antilog ((34.12 – 6 – 2.14)/10)

ERP = Antilog (2.598)

ERP = 0.396 W

The maximum allowed exposure is 1.5 Watts, therefore, this unit meets the requirements of
<1,5 GHZ.

Maximum output power is 31.54 dBm. (1850.13 MHz)

Thje unit features GPRS Class 10 (2 up, 4 down) as described on page 4 of the Technical
manual.

With a total time averaging of 8 packets, the 2 packet upload yields a duty cycle of
2/8 = .25 or 25%.

Using the formula for duty cycle correction = 10 log (0.25) = -6dB, the ERP is calculated as
follows:

ERP = Antilog ((31.54 – 6 – 2.14)/10)

ERP = Antilog (2.34)

ERP = 0.219 W

The maximum allowed exposure is 3 Watts, therefore, this unit meets the requirements of
>1,5 GHZ.

Document Created: 2019-11-07 01:30:36
Document Modified: 2019-11-07 01:30:36

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