N017RW
Premium Pilot
I'm gonna stir up this hornet's nest of a thread:
(similar info also posted in the thread titled 'FCC Application for Phantom 3 Pro and Advanced')
I reviewed the 'GRANT OF EQUIPMENT AUTHORIZATION' for the P3 Tx found here:
http://fccid.net/number.php?fcc=SS3-GL3001501&id=845254#axzz3Xf1LcJhR
Interesting, it shows a conducted Tx power level of only 0.038 watts. This is VERY close to the CE limit for Tx power.
This is measured by a direct connection to the Tx antenna coaxial output connector in to 50 ohm power sensor.
0.038 watts = 15.8dBm.
Now the interesting part... the [U.S. / FCC model] Tx employs a 3.5dBi forward gain antenna.
(I have no idea if it's the left or the right one, the other is Rx only.)
Now if we add the 15.8dBm conducted Tx power + the antenna's 3.5dBi forward gain, we get: 19.3dBm or 0.085mW.
A bit shy of 20dBm or 100mW.
It would seem the antenna(s) (at least the Tx) are directional to achieve the gain and thus have a front/rear.
Also, pure speculation:
It may be that the CE versions omit the 3.5dBi gain Tx antenna and use a typical omni. Because the Tx's conducted output is [only] 0.038mW the Tx can be the exact same model for the CE with [just] a different Tx antenna and be within the CE max power limit.
I welcome others to read the doc. and see what thier opinions are.
(similar info also posted in the thread titled 'FCC Application for Phantom 3 Pro and Advanced')
I reviewed the 'GRANT OF EQUIPMENT AUTHORIZATION' for the P3 Tx found here:
http://fccid.net/number.php?fcc=SS3-GL3001501&id=845254#axzz3Xf1LcJhR
Interesting, it shows a conducted Tx power level of only 0.038 watts. This is VERY close to the CE limit for Tx power.
This is measured by a direct connection to the Tx antenna coaxial output connector in to 50 ohm power sensor.
0.038 watts = 15.8dBm.
Now the interesting part... the [U.S. / FCC model] Tx employs a 3.5dBi forward gain antenna.
(I have no idea if it's the left or the right one, the other is Rx only.)
Now if we add the 15.8dBm conducted Tx power + the antenna's 3.5dBi forward gain, we get: 19.3dBm or 0.085mW.
A bit shy of 20dBm or 100mW.
It would seem the antenna(s) (at least the Tx) are directional to achieve the gain and thus have a front/rear.
Also, pure speculation:
It may be that the CE versions omit the 3.5dBi gain Tx antenna and use a typical omni. Because the Tx's conducted output is [only] 0.038mW the Tx can be the exact same model for the CE with [just] a different Tx antenna and be within the CE max power limit.
I welcome others to read the doc. and see what thier opinions are.