RS200
(PC Based)
User’s Manual
2.1.5 Environmental Specifications
Most applications involve the module transmitting periodically to inventory tags
in the field. The longer the transmitter is on in relation to its off time (the “duty
cycle”) the faster the temperature will rise. The module will not transmit if the
temperature is at a dangerous level, but will transmit again as soon as the
temperature drops – often so quickly it is hardly noticeable. Other factors that
affect the time before the module begins to protect itself is the ambient
temperature and the power level at which the module is transmitting. These
factors are represented in the following table, which give the typical minutes of
transmission time before thermal protection is enabled:
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Ambient Temp. (c)
RF Power (dBm) Duty Cycle %
Time (m) to reach max temperature
-40 30
98 No
restriction
25 23
50 No
restriction
25 23
60
2.93
25 23
80
2.22
25 23
98
1.24
25 30
40 No
restriction
25 30
50
6.68
25 30
60
2.49
25 30
80
1.5
25 30
98
1.06
60 23
30
5.64
60 23
50
1.13
60 23
60
0.81
60 23
80
0.54
60 23
98
0.29
60 30
15 No
restriction
60 30
30
1.98
60 30
50
0.73
60 30
60
0.56
60 30
80
0.27
60 30
98
0.27
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