FreeWave Technologies
August 13, 2004
2.4GHz Spread Spectrum Installation Guide
V3.7
LIG0002AC Rev A
5 of 12
The following antennas are approved for use with FreeWave 2.4GHz transceivers:
2.4GH Directional Antennas
Gain Manufacturer
Manufacturer
Model Number
FreeWave
Model Number
14dB Mobile
Mark
SCR14-2400
EAN2414CR
2.4 GHz Omni-directional Antennas
Gain Manufacturer
Manufacturer
Model Number
FreeWave
Model Number
5dB Maxrad
MAXC24505
EAN2405WC
2.5dB Mobile
Mark
PSTN3-2400N
EAN2400NH
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 2.4GHz
transceivers at given antenna gain (14 dB and 5 dB antennas are given as an example in
Point to Point and Point to Multipoint systems) and cable loss combinations. Please note that
it is installer’s responsibility to assure that the emission limits are not exceeded
.
Table 2 below shows how the RF Xmit Power settings on the transceiver correspond to the
EIRP of the transceiver-cable-antenna combination for the 14 dB Yagi antenna at different
cable loss values for the Point-to-Point system architecture.
Shaded area indicates combinations where EIRP limitations exceed FCC regulations and
RF Xmit Power must be reduced.
Table 1:
Output Power Settings at given Antenna Gain &
Cable Loss combination.
Cable Loss
1dB
2dB
3dB
4dB
14dB,
Point-to-Point
6 8 9 9
14 dB,
Point-to-Multipoint
5 5 6 8
5dB
9 9 9 9
Table 2:
FreeWave Technologies 2.4GHz EIRP for 14dB
Corner Reflector Antenna, Point-to-Point system
architecture, Cable loss vs. RF Xmit Power Setting.
Cable
Loss
1dB 2dB 3dB 4dB
9
39.43
38.43
37.43
36.43
8
38.98
37.98
36.98 35.98
7
38.17 37.17 36.17 35.17
6
36.93 35.93 34.93 33.93
5
34.96 33.96 32.96 31.96
Antenna G
a
in
RF Xm
it Power
