Stryker 4701 Manuel D'exploitation page 55

(Continued)
Guidance and manufacturer's declaration - electromagnetic immunity
Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
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 the Model 4701 is used exceeds the
applicable RF compliance level above, the Model 4701 should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating the Model 4701.
b Over the frequency range 150 kHz to 80 MHz, field strengths are less than 3 V/m.
Recommended separations distances between portable and mobile RF communications equipment and the
The Model 4701 is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the Model 4701 can help prevent electromagnetic interferences by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the
Model 4701 as recommended below, according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter
W
0.01
0.1
1
10
100
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 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
www.stryker.com
EMC Information
Model 4701
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
D=(1.2) (√P)
1.12
0.38
1.2
3.8
12
4701-209-001 REV B
m
80 MHz to 800 MHz
D=(1.2) (√P)
0.12
0.38
1.2
3.8
12
800 MHz to 2.5 GHz
D=(2.3) (√P)
0.23
0.73
2.3
7.3
23
1-49
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