10
should be less than the compliance level in each
frequency range. b
Interference may occur in the vicinity of equipment
marked with following symbol:
NOTES 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTES 2 These guidelines may not apply in all situations, Electromagnetic propagation is affected
by absorption and reflection structures, objects and people.
a Field strengths from fixed transmitters, such as base station for radio (cellular/cordless)
telephones and land mobile 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 Infrared Thermometer (CFT-308) should be observed to verify
normal operation. If abnormal performance is observed, additional measurements may be
necessary, such as reorienting of the relocating the Infrared Thermometer (CFT-308).
b Over the frequency range 150 kHz to 80 MHz, fields strengths should be less than 3 V/m
Recommended separation distances between portable and mobile RF communications
equipment and the EQUIPMENT or SYSTEMS - For all EQUIPMENT and SYSTEMS that are not
LIFE-SUPPORTING
Recommended separation distances between
portable and mobile RF communications equipment and Infrared Thermometer (CFT-308)
The Infrared Thermometer (CFT-308) is intended for use in electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the Infrared Thermometer
(CFT-308) can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the Infrared
Thermometer (CFT-308) as recommended below, according to the maximum output power of the
communications equipment.
Rated maximum output power
of transmitter (W)
Separation distance according to frequency of transmitter (m)
80 MHz to 800 MHz
d = 0.35
√
P
800 MHz to 2.5 GHz
d = 0.7
√
P
0.01
0.035
0.070
0.1
0.111
0.222
1
0.35
0.70
10
1.107
2.214
100
3.5
7.0
For transmitters rated at a maximum output power not listed above, the recommended separation
distanced 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.
NOTES 1 At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTES 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected
by absorption and reflection from structures, objects and people.
