Guidance & Declaration - Electromagnetic immunity
The model UDS-A is intended for use in.the electromagnetic environment specified below. The customer or
the user of the model UDS-A should assure that it is used in such an environment.
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 model UDS-A is used exceeds the applicable RF compliance level above, the
model UDS-A should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as reorienting or relocating the model UDS-A.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3V/m.
a
b
Immunity test
IEC 60601 test
level
Compliance
level
Electromagnetic environment - guidance
Portable and mobile RF communications equipment
s
hould be used no closer to any part of the model
UDS-A, including cables, than the recommended
separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
3V
3V
3 V/m
d=2.3
×
P1/2 800 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:
NOTE I At 80 MHz end 800 MHz. 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.
3 V/m d=1.2
×
P1/2 80 MHz to 800 MHZ
lEC 61000-4-6 150 kHz to 80 MHZ
Conducted RF
lEC 61000-4-3 80 MHz to 2.5 Ghz
3 Vrms
Radiated RF
18
