Stryker 0240050988, Manual

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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 compli-
ance 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
Equipment and the SDC Ultra™ System
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 output power of the communications equipment.
Rated maximum output
power (W) of transmitter
Separation distance (m) according to frequency of transmitter
150 kHz to 80 MHz
d = 1.17√P
80 kHz to 800 MHz
d = 1.17√P
800 kHz to 2.5 GHz
d = 1.17√P
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1.17 1.17 2.33
10 3.70 3.70 7.37
100 11.70 11.70 23.30
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.