SmartSight Networks Inc MF24 ユーザーズマニュアル
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3.1.2 Evaluating System Gain Requirements
To establish a link between two antennas, the following requirements must be
met:
Path loss < system gain (radio gain + antenna gain - cable losses).
The radio gain, at a specific bit error rate (BER), is equal to the transmission
power less the radio receiving sensitivity. The radio gain provided by the
Microflex depends on the power output and data rate selected via the MNM
software. At maximum power and medium data rate (384 kbps), the radio gain is
122 dB. At minimum data rate (192 kbps), the radio gain is 125 dB.
The antenna gain will vary according to the model selected. ComLink offers a
selection of antennas to meet the propagation specifications of various
configurations (See Table 1).
Using the maximum radio gain with the maximum allowed 11 dBi antenna gain
(including cable losses) at both ends, the achievable system gain is 147dB (at
192kbps data rate).
met:
Path loss < system gain (radio gain + antenna gain - cable losses).
The radio gain, at a specific bit error rate (BER), is equal to the transmission
power less the radio receiving sensitivity. The radio gain provided by the
Microflex depends on the power output and data rate selected via the MNM
software. At maximum power and medium data rate (384 kbps), the radio gain is
122 dB. At minimum data rate (192 kbps), the radio gain is 125 dB.
The antenna gain will vary according to the model selected. ComLink offers a
selection of antennas to meet the propagation specifications of various
configurations (See Table 1).
Using the maximum radio gain with the maximum allowed 11 dBi antenna gain
(including cable losses) at both ends, the achievable system gain is 147dB (at
192kbps data rate).
2.4 - 2.4835 GHz
ANTENNA TYPE
PART NUMBER
DESCRIPTION
6 dBi omni
ANT-WO6-24
Antenna used at the base or
repeater station to transmit 360
repeater station to transmit 360
o
in a
horizontal plane.
8 dBi flat panel
(circular polarized)
ANT-WP8-24
Low profile directional antenna used
at the remote stations.
at the remote stations.
9 dBi omni
ANT-WO9-24
Antenna used at the base or
repeater station to transmit 360
repeater station to transmit 360
o
in a
horizontal plane.
11 dBi flat panel
ANT-WP11-24
Directional antenna used at the
remote stations.
remote stations.
12 dBi omni
ANT-WO12-24
Antenna used at the base or
repeater station to transmit 360
repeater station to transmit 360
o
in a
horizontal plane (used to
compensate for cable losses
greater than 1dB)
compensate for cable losses
greater than 1dB)
Table 1 – Antenna Gain
Since the Microflex can be installed next to the antenna, it is easy to minimize
coaxial cable losses. This allows the use of smaller, lower cost antennas.
coaxial cable losses. This allows the use of smaller, lower cost antennas.