Calculation Example For The Transmission Power (Eirp) - ADS-tec IRF2000 Series Instruction Manual

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IRF2000 series - standard
WARNING
Radio interference and possible health damage due to exceeding the permitted
transmission power!
The maximum permitted field strength can be exceeded when using directional
antennas with a high level of antenna gain.
Comply with the maximum permitted signal strength (EIRP) as per the
national or local regulations (see calculation example for EIRP).
Observe the regulations and standards which apply at the installation site
(e.g. the standards for antenna erection VDE 0855 and for lightning
protection VDE 0185-305).
Always have the planning, installation and acceptance of antenna systems
carried out by a specialist with electro-technical qualifications.
To comply with FCC / IC regulations limiting both maximum RF output power
and human exposure to RF radiation, the maximum antenna gain including
cable loss in a mobile-only exposure condition must not exceed:
6.5 dBi in Cellular band
3.0 dBi in PCS band
3.0 dBi in LTE Band 2
6.0 dBi in LTE Band 4
6.5 dBi in LTE Band 5
9.0 dBi in LTE Band 13
9.0 dBi in LTE Band 17
3.0 dBi in LTE Band 25

3.9 Calculation example for the transmission power (EIRP)

EIRP = P
- C
out
loss
EIRP
= Equivalent Isotropically Radiated Power
P
= Transmission power of the device
out
C
= Losses caused by attenuation in the coaxial cable
loss
Ant
= Antenna gain
gain
© ads-tec Industrial IT GmbH • Heinrich-Hertz-Str. 1 • 72622 Nürtingen • Germany
+ Ant
= 22 dBm - 8 dB + 9 dBi = 23 dBm (≙ 200 mW)
gain
Doc v2.7
17

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