GE ApexPro Service Manual page 194

Electromagnetic compatibility
Immunity test
Conducted RF
EN 61000-4-6
Radiated RF
EN 61000-4-3
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 reflection from structures, objects, and
people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile 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 equipment
is used exceeds the applicable RF compliance level above, the equipment should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating the equipment.
b
Over the frequency range 150 KHz to 80 MHz, field strengths should be less than 3 V/m.
c
The low power design does not allow the use of high dynamic range operational amplifiers. To further reduce size and cost, the ECG
section utilizes single supply topology, and unshielded Flex assemblies. The result of the above mentioned design choices results in a
design that provides acceptable performance in the clinical environment.
D-4
ITE test level
3 Vrms
150 KHz to 80 MHz
3 V/m
80 MHz to 1 GHz
The ATS is suitable for use in the specified electromagnetic environment. For more
information, refer to the appropriate service manual.
The customer and/or the user of the CIC Pro center and ATS should assure that they
are used in an electromagnetic environment as described below.
Manage (increase) distance between sources of EMI and susceptible devices.
ApexPro™ Telemetry
Compliance level Electromagnetic environment – guidance
Portable and mobile RF communications
equipment should not be used closer to any part of
the equipment, including cables, than the
recommended separation distance calculated from
the equation applicable to the frequency of the
transmitter.
Recommended separation distance
3 V rms
d = 1.2
c
3 V/m
d = 1.2
d = 2.33
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:
80 MHz to 800 MHz
800 MHz to 1 GHz
b
.
2001989-203C
a
,