User's Manual

FreeWave Technologies
October 22, 2013
900 MHz Spread Spectrum Installation Manual
V5.3
LIG0003AC Rev D 9 of 11
WARNING: Any antennas placed outdoors must be properly grounded. Use extreme
caution when installing antennas and follow all instructions included with the
antennas.
Table 1 below provides the maximum output power settings for FreeWave transceivers at
given antenna gain (12.15 dBi and 8.15 dBi Yagi antennas are given as an example) and
cable loss combinations. Please note that it is the installer’s responsibility to ensure that
the emission limits are not exceeded.
Table 2 below shows how the Transmit Power settings on the radio correspond to the EIRP
of the transceiver-cable-antenna combination for the 12.15 dBi Yagi antenna at different
cable loss values.
Shaded area indicates combinations where EIRP limitations exceed FCC regulations
and RF Xmit Power must be reduced.
Table 3 below is similar to the Table 2, but shows the information for the 8.15 dB Omni
antenna.
Table 1: Output Power Settings at given Antenna Gain &
Cable Loss combination.
Cable Loss
1dB 2dB 3dB 4dB
Antenna
12.15 dBi 5 6 6 7
Gain
8.15 dBi 8 9 10 10
Table 2: EIRP for 12.15 dBi Yagi Antenna, Cable loss vs.
RF Xmit Power Setting.
Cable Loss
1dB 2dB 3dB 4dB
RF Xmit
10
41.15 40.15 39.15 38.15
Power
9
40.25 39.25 38.25 37.25
8
39.25 38.25 37.25 36.25
7
38.05 37.05 36.05
35.05
6
36.75
35.75 34.75 33.75
Table 3: EIRP for 8.15 dBi Omni Antenna, Cable loss vs.
RF Xmit Power Setting.