Installation BAT450-F
Release 12 07/2020
53
9
Configuring the transmit power for the
4.9 GHz band
Note:
This chapter exclusively applies to device variants with approval for
the 4.9 GHz band (Approvals 2, characteristic value P).
Note:
The operator of a WLAN radio installation must adhere to the
applicable transmission threshold values.
).
In the graphical user interface, proceed as follows:
Open the
Configuration > Wireless LAN > General
dialog.
In the “General” frame in the “Restrict to 4.9GHz operation mode” row,
choose the “Enabled” option in the drop-down list.
Note:
For devices operating in the 4.9 GHz band according to
FCC 47CFR Part 90 Subpart Y the following applies:
For antennas with an antenna gain >9 dBi, the transmit power must be
reduced accordingly in the device software. For more detailed information
see the following step-by-step instructions.
Open the
HiLCOS Menu Tree > Setup > Interfaces > WLAN >
Radio-Settings
dialog.
In the “lfc” column, click the physical WLAN interface to which you
connect the antenna.
In the “Radio-Band” row, choose the “5GHz” option in the drop-down list.
Subtract the cable and installed overvoltage protector attenuation from
the antenna gain. If the value after subtracting the attenuation is
≤
9 dBi,
you do not need to do anything else.
If the value is >9 dBi, proceed as follows:
Calculate the difference to the maximum permitted antenna gain of 9 dBi.
Example calculation for an antenna gain of 14 dBi and an attenuation of
2 dBi:
Step 1 (antenna gain minus attenuation):
14 dBi - 2 dBi = 12 dBi
As the value is >9 dBi, the difference to the maximum permitted 9 dBi
must be calculated in Step 2.
Step 2: 12 dBi - 9 dBi = 3 dBi
Enter the difference you have calculated in the “Tx-Power-Reduction”
field.
