User's Manual

Designing a Fusion Wideband Solution
Page 86 InterReach Fusion Wideband Installation, Operation, and Reference Manual
© 2015 TE Connectivity D-620616-0-20 Rev K • TECP-77-044 Issue 9 • March 2015
Equation 4—Maximum Antenna Coverage
By setting the path loss to the maximum allowable level (PL = APL), Equation 3 can be used to
estimate the maximum coverage distance of an antenna connected to a RAU, for a given frequency
and type of in-building environment.
d = 10^((APL - 20log
10
(4πf/c))/PLS)
For reference, Table 74 through Table 80 on page 88 show the distance covered by an antenna for
various in-building environments, in which the f
ollowing assumptions were made:
• 6 dBm output per carrier at the RAU output
• 3 dBi antenna gain
• RSSI design goal is equal to –85 dBm, which is typical for n
arrowband protocols, but not for
spread-spectrum protocols.
Table 74.
Approximate Radiated Distance from Antenna for 800 MHz SMR Applications
Environment Type Distance from Antenna
Meters Feet
Open Environment 75 244
Moderately Open Environment 64 208
Mildly Dense Environment 56 184
Moderately Dense Environment 48 156
Dense Environment 40 131
Table 75. Approximate Radiated Distance from Antenna for 850 MHz Cellular Applications
Environment Type Distance from Antenna
Meters Feet
Open Environment 73 241
Moderately Open Environment 63 205
Mildly Dense Environment 55 181
Moderately Dense Environment 47 154
Dense Environment 39 129