i have just ordered a groove A-2hn AP (631mW output)
and a 15dBi omni antenna
connecting the ap directly to ant. (no cable loss)
using formula to calc EIRP i get 19.954 Watts
question::EIRP = P ´ 10 dBi/10
(P = transmitter-amp power in Watts. dBi = gain in dBi - cable attenuation in dB. This result is in Watts.)
or EIRP = P - A + G
(P = transmitter-amp power in dBm, A = Atennuation in dB, G = Gain in dBi. The result is in dBm)
is this legal by FCC. everything i found says....
which only defines "directional antenna" where mine is an omni.2.2 Part 15.247
Devices that operate to FCC Part 15.247 are limited to frequency hopping and digitally modulated
systems.
2.2.1 Digital Modulation System Requirements
The FCC, under the definition of systems using digital modulation techniques, allows a device to
comply with these regulations without necessarily implementing Direct Sequence Spread Spectrum
(DSSS), provided that the following requirements are met:
1. The minimum 6 dB bandwidth of the signal shall be at least 500 kHz.
2. The maximum permitted peak conducted output power is +30 dBm (1 W). However, the
power spectral density conducted from the intentional radiator to the antenna shall not be
greater than +8 dBm in any 3 kHz band during any time interval of continuous transmission.
3. If the antenna used has a directional gain in excess of 6 dBi then the conducted output power
described shall be reduced by the amount in dB that the directional gain of the antenna
exceeds 6 dBi.
4. In any 100 kHz bandwidth outside the frequency band of operation the power shall be at least
20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of
the desired power.
5. Radiated harmonic and spurious emissions which fall within the restricted bands, as defined
in FCC Part 15.205, must comply with the radiated emission limits specified in FCC Part
15.209.
should i be ok with this or will i have to turn down the power.
also i remember in the routerOS that you had to set the Country.
i first assumed that it was only for which frequencies were available, but now im wondering ...
it knows the output power of the AP and you specify your antenna gain. using that does the routerOS regulate the AP to stay within the FCC limits. (long shot but a guess)
any help or reference is appreciated.
i searched the forum and net and found similar answers but nothing that will lay this question of mine to rest
