User Manual

Chapter 10. Certification Information and WEEE Compliance
• Any transmitter installed in the CF card slot must not exceed 4 W of e.i.r.p. To check if a
particular equipment complies with this restriction, you need to know its FCC ID number
and visit the searching engine in the FCC web site in the following Internet address,
where you can find the output power by the equipment in the grant of equipment:
https://gullfoss2.fcc.gov/prod/oet/cf/eas/reports/GenericSearch.cfm
If this link does not work properly, please visit the FCC website (http://www.fcc.gov/) and
follow the following steps to find the searching engine:
FCC website −→ Office of Engineering Technology −→ Equipment Authorization Electronic
Filing −→ Generic Search
Please notice that the output power listed in the grant uses different units depending on the
type of the equipment, e.g.:
1. The output power for 802.11a/b/g/h equipment or similar equipment approved under
§15.247 or §15.407 is listed as Conducted RF power. §15.247 or §15.407 limit the e.i.r.p. to
4 W, so this restriction is fulfilled.
2. The output power for Part 22 cellular equipment is listed as e.r.p. The relationship between
e.r.p. and e.i.r.p. is the following one:
e.i.r.p. = 1.64 x e.r.p.
3. The output power for Part 24 PCS equipment is listed as e.i.r.p.
4. For other type of equipment, please consult the distributor in order to assure the restriction
is fulfilled.
Note: Definitions:
Effective Radiated Power (e.r.p.) (in a given direction): The product of the power supplied to the
antenna and its gain relative to half-wave dipole in a given direction.
Equivalent Isotropically Radiated Power (e.i.r.p.) (in a given direction): The product of the power
supplied to the antenna and its gain relative to an isotropic antenna.
The table below is excerpted from Table 1B of 47 CFR 1.1310 titled Limits for Maximum Permis-
sible Exposure (MPE), Limits for General Population/Uncontrolled Exposure:
Frequency Range (MHz) Power Density (mW/cm
2
)
300 - 1500 f/1500
1500 - 100000 1.0
Table 10-1. Excerpt of Table 1B of 47 CFR 1.1310
The equipment WRAP Access Server equipment transmits in the 2400 - 2483.5 MHz frequency
range, so the applicable MPE limit is 1 mW/cm
2
. The equipment can be provided with up to 4
Bluetooth modules WT11# (FCC ID: QOQWT11):
Under the conditions stated above MPE limits can be guaranteed as the calculation below shows:
Example 10-1. 15.247 or 15.407 Compact Flash Card with maximum allowed e.i.r.p. of 4 W
Using Equation from page 18 of OET Bulletin 65, Edition 97-01:
S
Compact Flash card
= Prad (e.i.r.p.)
Compact Flash card
/ 4πR
2
= 4000 mW/4π(20 cm)
2
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