RadHaz Assessment

FCC ID: STZSRMA9000UW

RF Exposure Info

Download: PDF

FCCID_1857810

Exposure of humans to RF fields

As per Section 1.1310 mobile transmitters are required to be operated in a manner that ensures
the public is not exposed to RF energy levels in accordance with OST/OET Bulletin Number
65.

Calculations have been made using the General Public/Uncontrolled Exposure limits.

Minimum safe distances have been calculated below.

Power density, mW/m2 = E2/3770

- Occupational / Controlled Exposure limit will be 1.47 mW/m2
(f/300 = 440 MHz/300)

- General Population / Uncontrolled exposure limit will be 0.293 mW/m2
(f/1500 = 440 MHz/1500)

The minimum distance from the antenna at which the MPE is met is calculated from the
equation relating field strength in V/m, transmit power in watts, transmit antenna gain,
transmitter duty cycle and separation distance in metres:

E, V/m = (√ (30 * P * G)) / d

Controlled Uncontrolled
E = 1.47 W/m2 = E2/3770 E = 0.293 W/m2 = E2/3770
E= √ 1.47*3770 E= √ 0.293*3770
E = 74.4 V/m E = 33.2 V/m

The rated maximum transmitter power = 25 watts.

Transmitter is operated using a quarter wave whip antenna with a gain of 2.14 dBi (1.64).

The client has declared a duty cycle of 50% as the device operates on a push to talk basis

Controlled Uncontrolled
d = √ (30 * P * G*DC) / E
d = √ (30 * 25 * 1.64 * 0.5) / 74.4 d = √ (30 * 25 * 1.64 * 0.5 ) / 33.2
d = 0.333 metres or 33.3 cm d = 0.747 metres or 74.7 cm

Result: Complies if the safe distances defined for each environment are applied.

____________________________________________________________________________________________________________________________________________________________________________

Page 21 of 33 Test Report No 121020.1 29th November 2012.

This report may not be reproduced except in full.

Document Created: 2012-12-03 08:20:44
Document Modified: 2012-12-03 08:20:44

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC