032-0265-EN Rev 1 D-5
Recommended separation distances between portable and mobile RF
communications equipment and the Gendex QST
The Gendex QST is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Gendex QST can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the Gendex QST as recommended
below, according to the maximum output power of the communications equipment.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and landmobile radios, amateur radio, AM and FM radio broadcast and TV broadcast
cannot be predicted theoretically with 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 Gendex QST is used exceeds the applicable RF compliance level
above, the Gendex QST should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re¬orienting or relocating the Gendex
QST.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m
Rated
maximum
output power
of transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2.5 GHz
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
11.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a maximum output power not listed above, 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
NOTE: At 80 MHz and 800 MHz, the separation distance for the higher frequency
range applies.
NOTE: These guidelines may not apply in all situations. Electromagnetic propagation
is affected by absorption and reflection from structures, objects and people.
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