GSi ALLEGRO - Page 61

GSI Allegro Tympanometer User Manual
D-0120695 Rev D 2022-06 Page 48
Guidance and Manufacturer’s Declaration - Electromagnetic Immunity (cont)
Immunity Test
IEC 60601 Test
Level
Compliance
Electromagnetic Environment-Guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80
MHz
6 Vrms in ISM and
amateur radio
bands 150 kHz
and 80 MHz
10 V/m
80 MHz to 2.7
GHz
3 Vrms
6 Vrms
10 V/m
Portable and mobile RF communications
equipment should be used no closer to any part of
the GSI Allegro, including cables than the
recommended separation distance calculated from
the equation applicable to the frequency of the
transmitter.
Recommended separation distance
d = [3.5/V
1
]
√
 (150 kHz to 80 MHz)
d=[12/V
2
]
√
 (ISM 150 kHz to 80 MHz)
Radiated RF
d = [12/E
1
]
√
 80 MHz to 800 MHz
d = [23/E
1
]
√
 800 MHz to 2.7 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 Strengthens from fixed RF transmitters, as
determined by an electromagnetic site survey (a*),
should be less than the compliance level in each
frequency range (b*).
Interference may occur near equipment marked:
Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2: These guidelines may not apply to 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 GSI Allegro is used exceeds the
applicable RF compliance level above, the GSI Allegro should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating the GSI Allegro.
(b*) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.