Does anyone know which wifi antenna on the phantom 3std is transmit and which one is receive
There are two in the RC and two in the aircraft
One has a black wire and the other has a grey wire in both the RC and the aircraft

The black wire from the gimbal is for video feed. I know that one cos I broke it.

WolvesSi Posted at 2016-8-9 15:11
The black wire from the gimbal is for video feed. I know that one cos I broke it.

So you think the black one in the drone is the transmit antenna

Specifically on the P3 Standard:

Remote:
One external 'whip' antenna for aircraft control (transmit on 5.8GHz)
Two internal 'patch' antennas for WiFi video and telemetry (bi-directional 2.4GHz)

Aircraft:
Two 'whip' antennas for aircraft control, one on each landing gear/leg (receive on 5.8GHz)
Two internal 'patch' antennas for video and telemetry transmission, located in the hollowed areas surrounding the battery compartment (bi-directional on 2.4GHz).

The 2.4GHz WiFi transmission contains video and telemetry from the aircraft. This is also how missions and other special flight modes (besides RTH) are sent from the mobile device to the aircraft.

OrlyP Posted at 2016-8-9 18:01
Specifically on the P3 Standard:

Remote:

Thankyou yes I know all of that I'm asking which of the two 2.4 antennas in the aircraft is the transmit antenna
Or do they both transmitt and receive

They both do tx/rx, as it is standard WiFi. The reason there are two antennas is for diversity.

OrlyP Posted at 2016-8-9 06:01
Specifically on the P3 Standard:

Remote:

What do you mean? (besides RTH). Do you mean including?

wmcvey Posted at 2016-8-9 21:46
What do you mean? (besides RTH). Do you mean including?

RTH would be from the RC at 5.8

the other missions and modes would be carried on the 2.4 link.

kirk2579@aol.co Posted at 2016-8-9 22:10
RTH would be from the RC at 5.8

the other missions and modes would be carried on the 2.4 link.

I read on a post awhile back that the RTH if done by the Go app was transmitted to the drone via 2.4 wifi, and if done by the S2 switch on the controller was transmitted by 5.8. What's your thought on that?

wmcvey Posted at 2016-8-10 11:13
I read on a post awhile back that the RTH if done by the Go app was transmitted to the drone via 2 ...

After giving it more thought, this is my take.

When RTH is triggered on the mobile device, one of two things could happen:
1. Send the RTH signal to the aircraft on 2.4GHz. But since the RC is acting as a hotspot on 2.4GHz, the RTH command, technically, passes through the RC before it is sent to the aircraft
2. Send the RTH to the remote on 2.4GHz, and the remote sends it to the aircraft on 5.8GHz.

These are speculations. Only developers who have access to the APIs would be able to know for sure which technique is being used.

wmcvey Posted at 2016-8-9 23:13
I read on a post awhile back that the RTH if done by the Go app was transmitted to the drone via 2 ...

sounds reasonable as the app is run via 2.4 and rc the 5.8

I am installing an inline amplifier in the aircraft so I am trying to find out which antenna to fit it to
They both go from the aircraft into the camera gimbal one black and one grey
I think as no one is %100 sure if they are both rx and Tx or which one is rx and which one is Tx
I will have to experiment by disconnecting one at a time and see which one affects the video signal the most
Thank you all for your information and input I will let you know what I discover and how it goes
So far with just the antenna upgrades I have achieved
1200 m in C E mode with no lag or loss of video or control
So it will be interesting to see the results using the amplifiers on both the wifi 2.4 and control 5.8 and also the aircraft 2.4 wifi

darrenphillips1 Posted at 2016-8-11 06:09
I am installing an inline amplifier in the aircraft so I am trying to find out which antenna to fit  ...

Have you got anything discovered?
I flew mine 2.5km with two small pcb yagis and panel antennas.
My video is lagging bit behind in range compared to 5.8 signal strenght so trying to improve that.