User's Manual

75
Recommended separation distances between portable and mobile RF
communications equipment and the EUT
There is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the EUT can help Prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the EUT as recommended below, according to the maximum output power of the
communications equipment.
Separation distance according to frequency of transmitter [m]
IEC 60601-1-2
Frequency of
Transmitter
Equation
Rated maximum
output power of
transmitter
[W]
150kHz to 80MHz
P
V
d







1
5.3
V
1
=3Vrms
Separation Distance
(meters)
80MHz to 800MHz
P
E
d







1
5.3
E
1
=3V/m
Separation Distance
(meters)
800MHz to 2.5GHz
P
E
d







1
7
E
1
=3V/m
Separation Distance
(meters)
0.01
0.116
0.1166
0.2333
0.1
0.368
0.3687
0.7378
1
1.166
1.1660
2.3333
10
3.687
3.6872
7.3785
100
11.660
11.6600
23.333
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in meters (m) can be estimated using the equation applicable to the frequency of the
transmitter, where p is the maximum output power rating of the transmitter in watts (W) according to the
transmitter manufacturer.
NOTE 1) At 80MHz and 800MHz, the separation distance for 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 the EUT is used exceeds the applicable RF compliance level above, the EUT should
be observed to verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as re-orienting or relocating the EUT.
b
Over the frequency range 150kHz to 80MHz, field strengths should be less than [V1] V/m.
Name
Shield Type
Length
Notes
Link cable
Shielded
6 m
Provided with wiring unit.
P-interface cable
Non-shielded
8 m
Provided with X-ray interface unit.
USB cable (A to B)
Non-shielded
1.8 m
Provided with AGI unit.
AC power cord (220V)
Shielded
1.8 m
Provided with charger unit.