Motorola Canopy FSK and OFDM radios PTP 100 (FSK) User Manual download pdf (Page 52)

Release 11.0 Release Notes and User Guide Supplement

Issue 1, March 2011 Page 52

×：

表示该有毒有害物质至少在该部件的某一均质材料中的含量超出SJ/T11363-2006

标准规定的限量要求。

11.3 RF EXPOSURE SEPARATION DISTANCES

To protect from overexposure to RF energy, install Canopy radios so as to provide and maintain

the minimum separation distances from all persons shown in Table 17.

Table 17: Exposure separation distances

Module Type

Separation Distance from Persons

Canopy Module (FSK or OFDM)

At least 20 cm (approx 8 in)

Canopy Module with Reflector Dish

At least 1.5 m (approx 5 ft)

Canopy Module with LENS

At least 50 cm (approx 20 in)

AP Antenna of connectorized module or integrated

900 MHz module

At least 80 cm (32 in)

Indoor 900 MHz SM

At least 10 cm (4 in)

The following section and its Table 18 provide details and discussion of the associated

calculations.

11.3.1 Details of Exposure Separation Distances Calculations and Power

Compliance Margins

Limits and guidelines for RF exposure come from:

 US FCC limits for the general population. See the FCC web site at

http://www.fcc.gov, and the policies, guidelines, and requirements in Part 1 of

Title 47 of the Code of Federal Regulations, as well as the guidelines and

suggestions for evaluating compliance in FCC OET Bulletin 65.

 Health Canada limits for the general population. See the Health Canada web

site at http://www.hc-sc.gc.ca/rpb and Safety Code 6.

 ICNIRP (International Commission on Non-Ionizing Radiation Protection)

guidelines for the general public. See the ICNIRP web site at

http://www.icnirp.de/ and Guidelines for Limiting Exposure to Time-Varying

Electric, Magnetic, and Electromagnetic Fields.

The applicable power density exposure limits from the documents referenced above are

 10 W/m

for RF energy in the 5.7/5.8-GHz frequency bands.

Peak power density in the far field of a radio frequency point source is calculated as follows:

S =

P " G

where

S = power density in W/m

P = RMS transmit power capability of the radio, in W

G = total Tx gain as a factor, converted from dB

d = distance from point source, in m

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