SA 35 and SA 36
Operation and Maintenance Manual
Manual 118 Issue 15
Page 25 of 28
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
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.
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
SA
35/36 is used exceeds the applicable RF compliance level above, the
SA
35/36 should be observed
to verify normal operation. If abnormal performance is observed, additional measures may be necessary,
such as re-orientating or relocating the
SA
35/36.
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
SA
35/36
The
SA
35/36 is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the
SA
35/36 can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and
the
SA
35/36 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 transmitter
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 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23.3
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
metres (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 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.
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