User's Manual

Appendix A: Technical Specifications - EMC Considerations A-7
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Recommended Separation Distances between portable and mobile RF Communications equipment and the
ClearCount SmartWand-DTX System Model A03
Equipment and Systems that are NOT Life-supporting
The SmartWand-DTX System contains a receiver operating at a frequency of 13.56 MHz +/- 7 kHz.
The SmartWand-DTX System may be interfered with by other equipment, even if that other equipment
complies with CISPR EMISSION requirements. If abnormal behavior is observed, please refer to the
separation distance chart provided in this appendix.
The SmartWand-DTX System contains a transmitter operating at a frequency of 13.56 MHz, using 10%
amplitude shift keying at a modulation frequency of 423.75 kHz, and maximum effective radiated power of
200 mW.
Recommended Separations Distances for the SmartWand-DTX System Model A03
The ClearCount SmartWand-DTX System Model A03 is intended for use in the electromagnetic environment
in which radiated disturbances are controlled. The customer or user of the ClearCount SmartWand-DTX
System Model A03 can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF Communications Equipment and the ClearCount SmartWand-DTX System
Model A03 as recommended below, according to the maximum output power of the communications
equipment.
Max Output Power
(Watts)
Separation (m)
150 kHz to 80MHz
D=(3.5/3)(Sqrt P)
Separation (m)
80 to 800MHz
D=(3.5/3)(Sqrt P)
Separation (m)
800MHz to 2.5GHz
D=(7/3)(Sqrt P)
0.01 .1166 .1166 .2333
0.1 .3689 .3689 .7378
1 1.1666 1.1666 2.3333
10 3.6893 3.6893 7.3786
100 11.6666 11.6666 23.3333
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.