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User Manual for Vital Signs Monitor
64
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, and electromagnetic site
survey should be considered. If the measured field strength in the location in which The
Vital Signs Monitor is used exceeds the applicable RF compliance level above, The
Vital Signs Monitor should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or
relocating The Vital Signs Monitor.
b: Over the frequency range 150 kHz to 80 MHz, field strengths should be less than
3V/m.
Table 4
Frequency Range and Level: RF wireless communication equipment
Test Frequency
(MHz)
Modulation
Minimum
immunity
Level
(V/m)
immunity Level
Applied (V/m)
385
**Pulse Modulation: 18 Hz
27
27
450
*FM + 5 Hz deviation: 1
kHz sine
**Pulse Modulation: 18 Hz
28
28
710
745
780
**Pulse Modulation: 217 Hz
9
9
810
870
930
**Pulse Modulation: 18 Hz
28
28
1720
1845
1970
**Pulse Modulation: 217 Hz
28
28
2450
**Pulse Modulation: 217 Hz
28
28
5240
5500
5785
**Pulse Modulation: 217 Hz
9
9
ATTENTION:
If necessary to achieve the IMMUNITY TEST LEVEL, the distance between the transmitting
antenna and the ME EQUIPMENT or ME SYSTEM may be reduced to 1 m. The 1 m test distance
is permitted by IEC 61000-4-3.