16
a
Fieldstrengthsfromfixedtransmitters,suchasbasestationsforradio(cellular/cordless)telephonesandland
mobileradios,amateurradio,AMandFMradiobroadcastandTVbroadcastcannotbepredictedtheoreti-
callywithaccuracy.ToassesstheelectromagneticenvironmentduetofixedRFtransmitters,anelectroma-
gnetic site survey should be considered. If the measured field strength in the location in which the model
STL25isusedexceedstheapplicableRFcompliancelevelabove,themodelSTL25shouldbeobservedto
verify normal operation. If abnormal performance is observed, additional measures may be necessary, such
asreorientingorrelocatingthemodelSTL25.
b Overthefrequencyrange150kHzto80MHz,fieldstrengthsshouldbelessthan3V/m.
Table 4: Recommended separation distances between portable and mobile RF communications
equipment and the model STL25
Recommended separation distances between
portable and mobile RF communications equipment and the model STL25
ThemodelSTL25isintendedforuseinelectromagneticenvironmentinwhichradiatedRFdisturbancesis
controlled.ThecustomerortheuserofthemodelSTL25canhelppreventelectromagneticinterferenceby
maintainingaminimumdistancebetweenportableandmobileRFcommunicationsequipment(transmitters)
andthemodelSTL25asrecommendedbelow,accordingtothemaximumoutputpowerofthecommunica-
tionsequipment.
Rated maximum output
power of transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
1.2P
80 MHz to 800 MHz
1.2P
800 MHz to 2,5 GHz
2.3 P
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
Fortransmittersratedatamaximumoutputpowernotlistedabove,therecommendedseparationdistanced
inmeters(m)canbeestimatedusingtheequationapplicabletothefrequencyofthetransmitter,whereP is
themaximumoutputpowerratingofthetransmitterinwatts(W)accordabletothetransmittermanufacturer.
NOTE 1At80MHzand800MHz.theseparationdistanceforthehigherfrequencyrangeapplies.
NOTE 2Theseguidelinesmaynotapplyinallsituations.Electromagneticpropagationisaffectedbyabsorpti-
on and reflection from structures, objects and people.
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