Nevro Senza - Page 45

Radiated
RF
IEC 61000-
4-3
3 V/m
80 MHz
to 2.5
GHz
3 V/m
80 M Hz to
2.5 GHz
d=1.2
√
80 MHz to 800 MHz
d=2.3
√
800 MHz to 2.5 GHz
Where P is the maximum output power rating of
the transmitter in watts (W) according to the
transmitter manufacturer and d is the
recommended separation distance in meters (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,
should be less than the compliance level in each
frequency range (b) Interference may occur in the
vicinity of equipment marked with the symbol
shown below:
NOTE: At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE: 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 Senza system is used
exceeds the applicable RF compliance level above, the Senza system should be observed to
verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the Senza system.
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 Senza system
The Senza system is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of the Senza system can help
prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the Senza system as
recommended below, according to the maximum output power of the communications
equipment.
Rated maximum output power of
transmitter
Separation distance according to frequency of
transmitter (meters)
Patient Manual 11052 Rev A (2015-01-16) 45