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Signal strenght measures in dBm of Inspire 1, M600 Pro and Mavic Pro

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Recently I've got RF Explorer 6G combo and started measuring the radio emmissions strenght of whatever I found at home :) So here are some results for some of the drones I have. This could be helpful to someone as reference. I'm in Europe so all drones are set to CE emmision strenght and all measurements where done by literally touching the antennas of the RF Explorer to the RC's or the Aircraft antennas.

Inspire 1 Raw, latest firmware:
RC 2.4Ghz -33.0 dBm
RC 5.8Ghz -29.5 dBm
Aircraft - 2.4Ghz -27.0 dBm

M600Pro, latest firmware:
RC 2.4Ghz -28.0 dBm
RC 5.8Ghz -28.0 dBm
Aircraft - 2.4Ghz -6.0 dBm

Mavic Pro, fw v1.03:
RC 2.4Ghz -5.5 dBm
Aircraft - 2.4Ghz -12.5 dBm

From this data can be seen that Mavic Pro RC also the M600Pro Aircraft are having some badass strenght compared to the rest. As usual Inspire is the weakest one from all aspects (RC and Aircraft). It will be interesting if someone have such data on his own to compare.

Edit:
Removed the lines for inspire and m600 with 5.8Ghz for the aircraft which was accidentally typed in.
 
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Were you able to measure the increased gain using your yagi?
Those Yagi adapters are not increasing the gain as any other signal reflector accessory, they are "focusing" the signal. For increased gain you need signal amplifier or to increase the gain of the transmitter itself.
 
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Those Yagi adapters are not increasing the gain as any other signal reflector accessory, they are "focusing" the signal. For increased gain you need signal amplifier or to increase the gain of the transmitter itself.
What is the difference between increased "focus" and increased gain? If you "focus" more of the transmission energy into a tighter directional beam, aren't you increasing the "gain" in the beam while decreasing gain when outside the beam? And if so, that would be measurable with RF equipment.

 
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What is the difference between increased "focus" and increased gain? If you "focus" more of the transmission energy into a tighter directional beam, aren't you increasing the "gain" in the beam while decreasing gain when outside the beam? And if so, that would be measurable with RF equipment.

First you should make difference between dBm and dBi. The first is measuring decibels per milliwatt and the second is measuring decibels per isotropic. My mesurements as you can see are in dBm and are not related to the isotropic characteristics of the measured antenna.
 
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Recently I've got RF Explorer 6G combo and started measuring the radio emmissions strenght of whatever I found at home :) So here are some results for some of the drones I have. This could be helpful to someone as reference. I'm in Europe so all drones are set to CE emmision strenght and all measurements where done by literally touching the antennas of the RF Explorer to the RC's or the Aircraft antennas.

Inspire 1 Raw, latest firmware:
RC 2.4Ghz -33.0 dBm
RC 5.8Ghz -29.5 dBm
Aircraft - 2.4Ghz -27.0 dBm
Aircraft - 5.8Ghz -43.0 dBm

M600Pro, latest firmware:
RC 2.4Ghz -28.0 dBm
RC 5.8Ghz -28.0 dBm
Aircraft - 2.4Ghz -6.0 dBm
Aircraft - 5.8Ghz -50.0 dBm

Mavic Pro, fw v1.03:
RC 2.4Ghz -5.5 dBm
Aircraft - 2.4Ghz -12.5 dBm

From this data can be seen that Mavic Pro RC also the M600Pro Aircraft are having some badass strenght compared to the rest. As usual Inspire is the weakest one from all aspects (RC and Aircraft). It will be interesting if someone have such data on his own to compare.
This is very interesting thanks!

I didn’t realize Inspire 1 had a 5.8 signal coming from the aircraft? I thought 5.8 was just from Slave RC to main RC?

For the uninitiated can you please explain why the levels are negative please? I thought a negative dbm was like extremely weak signal?
 
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I didn’t realize Inspire 1 had a 5.8 signal coming from the aircraft? I thought 5.8 was just from Slave RC to main RC?
Thanks for noting that! It's a mistake I probably did while making the post, the 5.8Ghz data typed for the inspire aircraft is actually from one of the other devices I measured at home and it looks I've mixed up the data accidentally. :oops:

For the uninitiated can you please explain why the levels are negative please? I thought a negative dbm was like extremely weak signal?
Yes it is very weak signal but that is because I'm not measuring with cable connected directly to the transmitter without using antennas, but trough the antennas the signal become attenuated. For example a relatively good wifi signal is rated to be -70dbm, at home my router is showing -40dBm when I touch the antennas. For the remote controlled "toys" we use it's much stronger so they can reach a few km range which a home router cant reach.
 
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Thanks for noting that! It's a mistake I probably did while making the post, the 5.8Ghz data typed for the inspire aircraft is actually from one of the other devices I measured at home and it looks I've mixed up the data accidentally. :oops:


Yes it is very weak signal but that is because I'm not measuring with cable connected directly to the transmitter without using antennas, but trough the antennas the signal become attenuated. For example a relatively good wifi signal is rated to be -70dbm, at home my router is showing -40dBm when I touch the antennas. For the remote controlled "toys" we use it's much stronger so they can reach a few km range which a home router cant reach.
Got it thanks!
 

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