Reader rf power, Reader rf power example, Reader rf power 58 – ThingMagic Astra User Manual
Page 58: Reader rf power example 58
Reader RF Power
Astra User Guide
58
Reader RF Power
If you are using an external antenna during initial installation, you must properly configure
to use the correct RF power to comply with FCC regulations. The software limit does not
allow the power to be set higher than 30.0 dBm. Therefore this particular antenna
configuration will comply with FCC regulations.
For the external antenna, the maximum RF power for compliance is determined from
antenna gain and antenna cable loss using the following formula:
Pmax = 36 dBm - Antenna Gain + Cable Loss
Reader RF Power Example
The antenna provided by ThingMagic that is listed in
has the following features:
Antenna that has a maximum gain of 6 dBi
Cable that has a loss of 0.6 dB
Using the formula listed above, you have the maximum RF power is (36- 6 + 0.6) = 30.6
dBm. For more information about setting the RF power, refer to
Note
Be sure to read
Compliance, Warranty, and IP Notices
to maintain compliance with
FCC regulations.