User Manual
LBL-xxxx Page 9
Proteus Two-part Patch Technical description Effective: xxXXX2016
recommended separation distance in
metres (m).
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey,
a
should
be less than the compliance level in
each frequency range.
b
Interference may occur in the vicinity
of equipment marked with the
following symbol:
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
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 Proteus Patch is used exceeds the applicable RF compliance level above,
the Proteus Patch should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the Proteus
Patch.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile
RF communications equipment and the Proteus Patch
The Proteus Patch is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Patch can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the Proteus Patch as recommended below, according to the maximum
output power of the communications equipment.
Rated maximum output
power of transmitter
W
Separation distance according to frequency of transmitte
r
150 kHz to 80 MHz
d = 1,2 √P
80 MHz to 800 MHz
d = 1,2 √P
800 MHz to 2.5 GHz
d = 2,3 √P
0.01 Not applicable 0.1 0.23
0.1 Not applicable 0.4 0.74
1 Not applicable 1.2 2.3