3033-001 Revision D January 2018
©NxThera 2018
Page 82 of 90
a
The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6.765
MHz to 6.795 MHz; 13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 to
40.70 MHz.
b
The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the
frequency range 80 MHz to 2.5 GHz are intended to decrease the likelihood that
mobile/portable communications equipment could cause interference if it is inadvertently
brought into patient areas. For this reason, an additional factor of 10/3 is used in
calculating the recommended separation distance for transmitters in these frequency
ranges.
c
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 Rezūm Generator is
used exceeds the applicable RF compliance level above, the Rezūm Generator should be
observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as re-orienting or relocating the Rezūm Generator.
d
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 1 V/m.
Table 17: Separation Distances
Recommended separation distances between portable and mobile RF communications
equipment and the Rezūm Generator
The Rezūm Generator is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Rezūm Generator can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and Rezūm Generator as recommended below,
according to the maximum output power of the communications equipment.
Separation distance according to frequency of transmitter (m)