YDI Wireless 2458-AL Wireless LAN User Manual RF Exposure

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Document ID	237220
Application ID	cDUBsGSP7CtbSuc1vc3USA==
Document Description	rf exposure information
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	0.58kB (7292 bits)
Date Submitted	2002-04-17 00:00:00
Date Available	2002-04-12 00:00:00
Creation Date	2002-02-04 10:09:44
Producing Software	Acrobat PDFWriter 4.05 for Windows
Document Lastmod	0000-00-00 00:00:00
Document Title	RF Exposure
Document Creator	Microsoft Word - RF Exposure

Notice in Installation Manual:
FCC Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment when installed as directed. This equipment should be
installed and operated with fix-mounted antennas that are installed with a
minimum of 2 meters of separation distance between the antenna and all persons’
body during normal operation.
RF Exposure Calculations:
The following information provides the minimum separation distance for the
highest gain antenna provided with the Model: CA2458 Converter with Agere
Extended WLAN Card, as calculated from FCC OET 65 Appendix B, Table
1B Guidelines for General Population/Uncontrolled Exposure. This calculation is
based on the highest EIRP possible from the system, considering maximum power
and antenna gain, and considering a 1.0 mW/cm^2 uncontrolled exposure limit.
The Friss formula used was:
S = (Po*G) / (4*Pi*r^2) or r = (Po*G) / (4*Pi*S)
Where S = 1.0 mW/cm^2 for 5800 MHz
Where Po = 250 mW (Peak RF)
Where G = Isotropic antenna gain (numeric)
Where r = Minimum Safe Distance from antenna (cm)
For: 27 dBi Dish Antenna - …… r = 100 cm
The following table lists the antennas that will be provided with the
system:
Authorized Antennas
Model
Antenna Type
Antenna
Gain
(dBi)
Max
EIRP
(dBm)
MPE Distance
(CM)
A5.8FP23
One foot dish
24
48
71
A5.8FP27
Two foot dish
27
51
100
A5.8-1’
One foot flat panel
24
48
71
A5.8-2’
Two foot flat panel
27
51
100
A5.8HP90-16
Uni-directional antenna
16
40
28
Notes:
1. MPE distance figures are based on a conservative “worse case” prediction, i.e. +24
dBm into antenna and using formula S=EIRP/(4piR²) and no calculation for duty
factor. In practice the minimum distance will be much shorter. (Ref. 2)
2. The minimum MPE distance has been calculated for the maximum allowed Power
Density (S) limit of 1.0 mW/cm2 in the Frequency range 1500-100,000 MHz for
uncontrolled environments (Ref. 2).
Reference:
1. FCC Part 15, sub-clause 15.247 (b) (4)
2. FCC OET Bulletin 65, Edition 97-01
3. FCC Supplement C to OET Bulletin 65, edition 97-01

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Page Count                      : 2
Creator                         : Microsoft Word - RF Exposure
Create Date                     : 2002:02:04 10:09:44
Title                           : RF Exposure
Producer                        : Acrobat PDFWriter 4.05 for Windows

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