Transmit Power
This setting specifies the RF transmit power.
Use a transmit power of 0 when bench testing to reduce RF exposure.
The FCC specifies a maximum EIRP (Effective Isotropic Radiated Power) of 36 dBm.
EIRP = (Transmitter Power) + (Antenna Gain) - (Cable Losses) [all in dB or dBm]
Radio installations should be performed by a professional. It is very important that the transmit power level selected and the gain of the attached antenna do not exceed the maximum allowed EIRP permitted by local regulations. Regulations vary by country and region. As the equipment owner, you are responsible for making sure that your installation and maintenance of the radio equipment ensure local regulations are met. For example, in much of the United States, FCC part 15 rules limit the 900 MHz, ISM band transmission from the <product> to a maximum effective radiated power of +36 dBm.
The <product> maximum power is 30.0 dBm; therefore, a 6 dB (or lower) gain antenna can be used with any Transmit Power setting. If a higher gain antenna is used, the cable loss will need to be determined, and the Transmit Power adjusted so as not to exceed the FCC limit of +36 dBm.
A lower Transmit Power can be used (to conserve battery power) if the required range allows it.
Transmit power settings shows the <product> RF transmit power versus the setting.
|
RF
transmit |
RF power (dBm) |
RF power (mW) |
|---|---|---|
|
10 |
30.0 |
1000 |
|
9 |
29.0 |
800 |
|
8 |
27.8 |
600 |
|
7 |
26.8 |
480 |
|
6 |
25.2 |
330 |
|
5 |
23.6 |
230 |
|
4 |
21.5 |
140 |
|
3 |
19.0 |
80 |
|
2 |
15.4 |
35 |
|
1 |
10.0 |
10 |
|
0 |
7.0 |
5 |