Stryker SDC Ultra Bedienungsanleitung Seite 73

Guidance and Manufacturer's Declaration: Electromagnetic Immunity
SDC Ultra™ is intended for use in the electromagnetic environment specified below. The customer or the
user of SDC Ultra™ should ensure that it is used in such an environment.
(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
SDC Ultra™ system is used exceeds the applicable RF compliance level above, the SDC Ultra™ system should
be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as reorienting or relocating the SDC Ultra™ unit.
(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
The SDC Ultra™ system is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The user of the SDC Ultra™ system can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the SDC Ultra™ system as recommended below, according to the maximum
Rated maximum output
power (W) of transmitter
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 manufac-
turer.
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 absorp-
tion and reflection from structures, objects, and people.
Equipment and the SDC Ultra™ System
output power of the communications equipment.
Separation distance (m) according to frequency of transmitter
150 kHz to 80 MHz
d = 1.17√P
0.12
0.37
1.17
3.70
11.70
80 kHz to 800 MHz
d = 1.17√P
0.12
0.37
1.17
3.70
11.70
800 kHz to 2.5 GHz
d = 1.17√P
0.23
0.74
2.33
7.37
23.30
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