ADS-tec IRF2000 Series - Calculation Example for the Transmission Power (EIRP)

IRF2000 series - standard Doc v2.7 17
© ads-tec Industrial IT GmbH • Heinrich-Hertz-Str. 1 • 72622 Nürtingen • Germany
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
out
- C
loss
+ Ant
gain
= 22 dBm - 8 dB + 9 dBi = 23 dBm (≙ 200 mW)
EIRP = Equivalent Isotropically Radiated Power
P
out
= Transmission power of the device
C
loss
= Losses caused by attenuation in the coaxial cable
Ant
gain
= Antenna gain