
EPX-SERISE USER MANUAL Rev. G
67
Guidelines and manufacturers: electromagnetic tolerance
It is very difficult to accurately predict the magnetic field strength of wireless (mobile/wireless)
telephones, land mobile radio base station, amateur wireless, AM, FM wireless and TV broadcasting
systems. To assess electromagnetic settings using fixed RF receivers, area walkdown is needed. If the
magnetic field strength measured at the point where the Diagnostic X-ray System is used exceeds the
applicable RF compliance level, you should check whether the Diagnostic X-ray System is operating
normally. Should any performance abnormality is observed, additional action may be needed such as
changing the Diagnostic X-ray
System’s direction or location. At the frequency range between 150kHz
and 80MHz, the magnetic field strength should be less than 3v/m.
Recommended intervals between the Diagnostic X-ray System and the portable or mobile RF
communications equipment
The Diagnostic X-ray System should be used in an electromagnetic setting where RF communication
interferences are controlled. Users of the Diagnostic X-ray System should maintain the minimum
intervals between the System and the portable or mobile RF communications equipments to prevent
electromagnetic interferences more effectively.
Maximum output power
rating of the
transceiver-receiver
Watts
Interval depending on the transceiver-
receiver’s frequency
meters
150kHz ~ 80MHz
d = 1.17√p
80MHz ~ 800MHz
d = 1.17√p
800MHz ~ 2.5GHz
d = 2.33√p
0.01
0.117
0.117
0.233
0.1
0.37
0.37
0.737
1
1.17
1.17
2.33
10
3.7
3.7
7.36
100
11.7
11.7
23.3
For maximum power voltages of receivers not on the above list, the recommended interval, d(m), can
be calculated by using the
equation used for the receiver’s frequency. The p is the transmitter-
receiver’s maximum power rating in watts (W).
Note 1 : The high-frequency range is applied at 80MHz and 800MHz.
Note 2 : This guideline does not apply in all situations. Electromagnetic waves may be affected through
absorption into and reflection from structures, objects and people.