FPV video

FPV Video Receiver

I roto i teie video, I will show the connection between the FPV VTX transmitter and receiver.
The transmitter parameter configuration tool needs an extra 12V power input. The transmitter also needs a 12V power input.
The programmer screen shows the current transmitter parameter. Through the transmitter’s programmer, you can modify the transmitter’s frequency, bandwidth, Te mau nota, te tahi atu a. If you use it for the first time, you don’t need to change any parameters. The default setting is already the best and tested in the factory.

Here is the receiver, which already has a small screen and buttons. The parameters here are the same as the transmitter. There are also SNR and PW values, SNR is signal quality and PW is signal strength.
SNR and PW values are very important. You need to check these parameters frequently.

The programmer and video input on the transmitter share the same input interface. So we first disconnect the power supply of the programmer. Remove the programmer and connect the video input cable. When operating, please remember to disconnect the power cord of the transmitter and do not operate it while it is powered on.

Now we give the transmitter a video input signal. Then connect the power to the transmitter. We put the transmitter on a metal sheet to speed up the heat dissipation of the transmitter. On the drone, you can use the propeller to dissipate heat towards the transmitter.

Wait a few seconds, and the video signal to appear on the FPV video receiver’s display. The transmitter supports SD 720P video input, and the receiver supports HDMI 1080P video output. The transmitter does not use HDMI input because SD has lower latency and faster encoding speed. As an FPV transmitter, low latency is more important than 1080P image quality.

We have replaced the video signal with the camera. The video picture is very stable and clean, with no snowflakes or mosaics.

SNR

The SNR value represents the quality of the wireless signal from the transmitter to the receiver.

The larger the SNR value is, the better the current signal is. The lower the value is, the worse the current signal is. When the SNR is lower than 5 no te 6, e tâpûhia te tapa'o no roto mai i te matini horo'araa i te taata farii e e ma'iti-noa-hia te hoho'a o te taata farii. E aore râ, te mau hoho'a.

I teie taime, e ti'a i te teitei o te antenna ia faatanohia e aore râ ia tauihia te ti'araa o te taata farii no te upooti'a i ni'a i te tahi mau fifi ia maitai a'e te fariiraa e ia ho'i te FAUFAA SNR i ni'a i te 6~7.

E faaite-noa-hia te faufaa SNR i muri a'e i te tuuraahia te matini nene'iraa i ni'a i te. Te rahiraa o te taime, tei te area 15dB te faufaa o te SNR, e e mea papû maitai te tapa'o video. Mai te peu e tei raro mai te faufaa o te SNR i te 6dB, e patahia te tapa'o video e aore râ e mo'e roa.

PW

No ni'a i te faufaa o te taata e farii i te afata, e nehenehe teie faito e hi'opo'a e, te vai ra anei te tahi fifi i ni'a i te taata e farii ra i te reira. Aita e faufaa ia tupohe i te reira. You only need to connect the receiver antenna and power it on to observe the PW value. If the PW value is -80, the current environment interferes with the receiver antenna. If the PW value is -90, the current environment is very clear and there is no interference to the receiver antenna.

If the PW value is less than -80, it may be because the transmitter is too close. I teie taime, you should adjust the distance between the transmitter and the receiver appropriately.