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Guidance and Manufacturer's Declaration – Electromagnetic Immunity
The model USM-100H is intended for use in the electromagnetic environment specified below. The
customer or the user of the model USM-100H should assure that it is used in such an environment.
IEC 60601 Test
Immunity test
Level
3 and 6 Vrms
Conducted RF
150 kHz to 80 MHz
IEC 61000-4-6
and specific ISM,
AM frequency
3V/m
Radiated RF
80 MHz to 2.7 GHz,
IEC 61000-4-3
and specific
frequency
NOTE 1: At 80 MHz and 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.
_________________________________________________________________________________
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 USM-100 is used exceeds the applicable RF compliance level above, USM-100 should
be observed to verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as reorienting or relocating the unit.
b.Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Compliance
Electromagnetic
Level
Environmental Guidance
Portable and mobile RF commu-
nications equipment should be
used no closer to any part of the
model POC-421-12/POC-424-12
SERIES, including cables, than
the recommended separation
distance calculated from the
equation applicable to the fre-
quency of the
3 and 6 Vrms
transmitter.
150 kHz to 80
Recommended Separation Dis-
MHz and specific
tance
ISM, AM fre-
d = 1,2
quency
d = 1,2
d = 2,3
where P is the maximum output
power rating of the transmitter in
watts (W) according to the trans-
mitter manufacturer and d is the
recommended separation dis-
tance in meters (m).
Field strengths from fixed RF
transmitters, as determined by
an electromagnetic site survey,
should be less than the compli-
ance level in each frequency
3V/m
80 MHz to 2.7
range.
GHz, and specific
in the vicinity of equipment
frequency
marked with the following sym-
bol:
18
80 MHz to 800 MHz
800 MHz to 2,5 GHz
a
b
Interference may occur
POC-421_424 User Manual
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