accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured
field strength in the location in which the system is used exceeds the applicable
RF compliance level in the table, the system should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the system.
NOTES
• For transmitters rated at a maximum output power not listed in the
following table, the recommended separation distance d in meters (m) can
be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output power rating of the transmitter
in watts (W) according to the transmitter manufacturer.
• At 80 MHz and 800 MHz, the higher frequency range applies.
• The recommended separation distance guidelines in the following table may
not apply to all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects, and people.
The information provided here, in conjunction with "Electromagnetic
Interference" on page 78, provides guidance on conducted and radiated
interference from portable and fixed RF transmitting equipment.
Recommended Separation Distances by Transmitter Frequency
800 MHz
to 2.5 GHz
80 to 800 MHz
150 kHz
to 80 MHz
Rated Maximum
Output Power of
Transmitter
(Watts)
0.24 m (9.5 in)0.12 m (4.7 in)0.12 m (4.7 in)0.01
0.76 m (30 in)0.38 m (15 in)0.38 m (15 in)0.1
2.4 m (7.9 ft)1.2 m (3.9 ft)1.2 m (3.9 ft)1
7.6 m (25 ft)3.8 m (12.5 ft)3.8 m (12.5 ft)10
24 m (78.7 ft)12 m (39.4 ft)12 m (39.4 ft)100
81
iU22 User Manual
4535 614 45861
2
Safety
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