135
Guidance and manufacturer’s declaration – electromagnetic immunity
Table 204
The Digitizer is intended for use in the electromagnetic environment specified below. The customer or end user of the Digitizer
should assure that it is used in such an environment.
Immunity test IEC 60601 test level Compliance level Electromagnetic environment - guidance
Portable and mobile RF communication equipment should be used
no closer to any part of the Digitizer, including cables, than the
recommended separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
3 V
P
d
2
.
1
=
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2,5 GHz
3 V/m
P
d
2
.
1
=
80 MHz to 800 MHz
P
d
3
.
2
=
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,
a
should be less than the compliance
level in each frequency range.
b
Interference may occur in the vicinity of equipment marked with
the following symbol:
Note1:
At 80MHz and 800MHz, the higher frequency range applies.
Note 2: These guidelines may not be applicable 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 Digitizer is used exceeds the applicable RF compliance
level above, the Digitizer should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as
reorienting or relocating the Digitizer.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
b
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