95/TX Operation & Maintenance Manual, Revision 1.0
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of the area inside the zone should be free of obstacles. Although both 900 MHz and 2.4 GHz signals can
travel around or through most towers or buildings, structures such as large metal tanks or solid metal
buildings may attenuate the signal to the point where reception is marginal.
Raising the antenna at either end of the path will improve signal strength and reduce transmission errors.
GDS Corp recommends placing any antenna at least 6 feet above the surrounding terrain, and even more
if possible. However, note that the standard antenna transmits its maximum signal strength in a relatively
flat ‘donut-shaped’ pattern which may affect the performance of 95/TX monitors located in close
proximity to an elevated C2/TX WSM or receiver/controller.
Figure 13-2: RF Transmission Zone
Combined Antenna Height
Distance
900 MHz 2.4 GHz
100 Ft
10’ / 3m 6’ / 2m
500 Ft
22’ / 7m 15’ / 5m
1000 Ft
30’/ 10m 20’ / 6m
3000 Ft
54’ / 17m N/A
RF Transmission Zone
