E.F. Johnson Company 242-20X1-213, Руководство пользователя

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1-4
October 1995
Part No. 001-2008-202
FCC EXPOSURE LIMITS
This fixed station radio transceiver was tested by the manufacturer with an appropriate antenna in order to verify compliance
with Maximum Permissible Exposure (MPE) limits set under Section 2.1091 of the FCC Rules and Regulations. The guide-
lines used in the evaluation are derived from Table 1 (B) titled “Limits For General Population/Uncontrolled Exposure” which
is from FCC report OET bulletin #65.
Table 2 lists the antennas recommended for use in the VHF frequency range. Each model of this radio was tested with the
appropriate antenna listed. The antenna shall be mounted to a tower and be a minimum of 10 meters above the ground at the
lowest point on the antenna. The radio manufacturer has determined that the user and service personnel should remain four (4)
meters in distance away from the antenna when transmitting. By maintaining this distance, these individuals are not exposed to
radio frequency energy or magnetic fields in excess of the guidelines set forth in Table 1 (B).
NOTE: Other antennas or installation configurations that have not been tested may not comply with FCC RF exposure limits
and therefore are not recommended.
Table 1 (B)
FCC Limits for Maximum Permissible Exposure (MPE)
(B) Limits For General Population/Uncontrolled Exposure
Frequency Range (MHz)
Electric Field Strength
(E) (V/m)
Magnetic Field Strength
(H) (A/m)
Power Density
(S) (mW/cm
2
)
0.3 - 1.34 614 1.63 (100)*
1.34 - 30 824/f 2.19/f (180/f
2
)*
30 - 300 27.5 0.073 0.2
300 - 1500 -- -- f/1500
1500 - 100,000 -- -- 1.0
f = Frequency in MHz *Plane-wave equivalent power density.
Table 2
Recommended Antennas
(Antenna Manufacturer - Decibel Products)
Frequency Antenna Model No.
132-144 MHz DB205E
144-178 MHz DB205F