91369 Service Manual
A-3
Appendix A — Electromagnetic Compatibility
Separation Distances
Note:
The monitor is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer, or user, of the monitor can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the monitor, as recommended below, according to the maximum output power of the
communications equipment.
Recommended Separation Distances Between Portable and Mobile RF Communications Equipment
and the Monitor (Always evaluate electronic equipment on site before use)
Immunity Test
IEC 60601
Test Level
Compliance
Level
Electromagnetic Environment
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to
80 MHz
3 Vm
80 MHz to
2.5 GHz
20 V r.m.s
1 kHz sine
80% AM
20 V/m
1 kHz sine
80% AM
Portable and mobile RF communications equipment
should be used no closer to any part of the monitor,
including cables, than the recommended separation
distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance:
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,* should be less than
the compliance level in each frequency range.**
Interference may occur in the vicinity of
equipment marked with the following symbol.
IEC 60417-5140: Non-ionizing electromagnetic
radiation.
* 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 monitors are used exceeds the applicable RF compliance level above, the
monitors should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as reorienting or relocating the monitors.
** Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [ V
1
] V/m.
d =
[
3.5
V
1
]
P
150 kHz to 80 MHz
d =
[
3.5
E
1
]
P
80 MHz to 800 MHz
d =
[
7
E
1
]
P
800 MHz to 2.5 GHz
