Garderos R-7700 Series, Руководство по эксплуатации

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6.3 WWAN radio settings
Based on the harmonized EU standards EN 50385:2017 and EN 50383:2010, taking
into account the reference values of the Council recommendations 1999/519/EG the
safety distances for the 2G/3G/4G antennas can be calculated. The calculation is
based on the output power of the router and the gain and losses inside the antenna
and extension cables.
The R-7700 routers are delivered with different WWAN modems depending on the
router type. To find out the modem type used in the router, login to the router, then
execute the command:
router# show hardware wwan
This command also shows the bands that the modem is active in.
The following tables show the maximum output power for all WWAN modems
depending on the supported technology:
WWAN modem type 2G 3G 4G CDMA450
EG25-G 35dBm 25dBm 25dBm
HE910-D 33.5dBm 24dBm
LE910-EU V2 33.5dBm 24.5dBm 24dBm
LE910-EU1 33.5dBm 24dBm
LE910-EUG 33.5dBm 25dBm 25dBm
MC7430 24dBm 24dBm
MPN200 25dBm
WPD-600N 23dBm
The gain and loss in the antenna and antenna cables also need to be taken into
account to get the output power relevant for the safety distance.
Calculate the total output power on the antenna. This value is calculated from:

Output power for each technology supported by the WWAN modem taken
from the table above.

Losses inside the router. This is a static value of -0.3dB.

Antenna gain taken from the data sheet of the antenna. If the gain depends on
the frequency, the calculation has to be done for each different gain.

Optional: Losses by extension cables.
Output power = Modem power -0.3dB + Antenna gain + Losses
Example:

Output power of the LE910-EU1 WWAN modem for 2G (GSM) is 33.5dBm, for
4G (LTE) it is 24dBm.

Losses inside the router are -0.3dB.

Antenna has a gain of 4dBi in all frequencies for 2G and 4G.

No extension cable.
Output power
4G
= 24dBm -0.3dB + 4dBi = 26.7dBi
Output power
2G
= 33.5dBm -0.3dB + 4dBi = 37.2dBi