GE BiliSoft Service Manual page 51

NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by adsorption
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 radios, AM and FM radio broadcasts and TV broadcasts 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 BiliSoft Phototherapy unit is used exceeds the applicable RF compliance
level above, the BiliSoft Phototherapy unit should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as reorienting or
relocating the BiliSoft Phototherapy unit.
b. Over the frequency range 150 KHz to 80 MHz field strengths should be less than 3 V/m.
Table 3
Recommended separation distance between portable and mobile RF communications equipment and
the BiliSoft Phototherapy System
The BiliSoft Phototherapy System is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of the BiliSoft Phototherapy System can help
prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communica¬tions equipment (transmitters) and the BiliSoft Phototherapy System as recommended below,
according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter W
0.01
0.1
1.0
10.0
100.0
For transmitters rated at a maximum output power not listed above, the recommended separation distance (d)
in meters (m) can be determined 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 80 MHz and 800 MHz, 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.
© 2007 by General Electric Company. All rights reserved.
Separation distance according to frequency of transmitter m
150 kHz to 80 MHZ
0.12
0.38
1.2
3.8
12.0
80 MHz to 800 MHz
0.12
0.38
1.2
3.8
12.0
M1110150 006
Chapter 9: Technical Reference
800 MHz to 2.5 GHz
0.23
0.73
2.3
7.3
23.0
37