Note
• At 80 MHz and 800 MHz, the higher frequency range applies.
• These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
• Interference may occur in the vicinity of equipment marked with the following symbol:
• Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey,
a)
should be less than the compliance level in each frequency range.
b)
a) Field strengths from fixed transmitters, such as base stations 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 this product is used
exceeds the applicable RF compliance level above, this product should be observed to
verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as re - orienting or relocating this product.
b)
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/ m.
Recommended separation distances between portable and mobile RF
communications equipment and this product
This product is intended for use in the electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of this product can help prevent electromagnetic interference
by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and this product as recommended below, according to the maximum output power of the
communications equipment.
Rated maximum output
power of transmitter
(W)
Recommended distance according to frequency of transmitter (m)
150 kHz to 80 MHz
d=1.2
√
P
80 MHz to 800 MHz
d=1.2
√
P
800 MHz to 2.5 GHz
d=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
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (m) can
be estimated using 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 higher frequency range applies.
• These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
Case 7 Description of Endoscopes Class B
84
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