Motorola Solutions Inc. 89FT7637 User Manual
Release 10.5
Release Notes and User Guide Supplement
FCC Draft, November 2010
Page
40
!
S =
P " G
4
#
d
2
where
S = power density in W/m
S = power density in W/m
2
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
G = total Tx gain as a factor, converted from dB
d = distance from point source, in m
Rearranging terms to solve for distance yields
!
d =
P " G
4
4
#
S
Table 14
shows calculated minimum separation distances d, recommended distances and
resulting power compliance margins for each frequency band and antenna combination.
Table 14: Calculated exposure distances and power compliance margins
Variable
Band
Antenna
P
G
S
d
(calcu-
lated)
Recom-
mended
Separation
Distance
mended
Separation
Distance
Power
Compliance
Margin
Compliance
Margin
integrated
0.25 W
(24 dBm)
15.8
(12 dB)
6 W/m
2
23 cm
80 cm
(32 in)
12
external Yagi
0.063 W
(18 dBm)
50.1
(17 dB)
6 W/m
2
20 cm
80 cm
(32 in)
15
external flat
panel
panel
0.39 W
(26 dBm)
10.0
(10 dB)
6 W/m
2
23 cm
80 cm
(32 in)
12
900 MHz
FSK
FSK
indoor, integrated
Simulation model used to estimate Specific
Absorption Rate (SAR) levels
10 cm
(4 in)
2
integrated
0.34 W
(25 dBm)
6.3
(8 dB)
10
W/m
2
13 cm
20 cm
(8 in)
2.3
2.4 GHz
FSK
FSK
integrated
plus reflector
plus reflector
0.34 W
(25 dBm)
79.4
(19 dB)
10
W/m
2
46 cm
1.5 m
(5 ft)
10
integrated
0.2 W
(23 dBm)
5.0
(7 dB)
10
W/m
2
9 cm
20 cm
(8 in)
5
integrated plus
reflector
reflector
0.0032 W
(5 dBm)
316
(25 dB)
10
W/m
2
9 cm
1.5 m
(5 ft)
279
5.2 GHz
FSK
FSK
integrated plus
LENS
LENS
0.025 W
(14 dBm)
40
(16 dB)
10
W/m
2
9 cm
50 cm
(12 in)
31
integrated
0.2 W
(23 dBm)
5.0
(7 dB)
10
W/m
2
9 cm
20 cm
(8 in)
5
integrated plus
reflector
reflector
0.0032 W
(5 dBm)
316
(25 dB)
10
W/m
2
9 cm
1.5 m
(5 ft)
279
5.4 GHz
FSK
FSK
integrated plus
LENS
LENS
0.020 W
(13 dBm)
50
(17 dB)
10
W/m
2
9 cm
50 cm
(12 in)
31