FPV range test in a park
Just a quick update on my FPV project: Today I went to a park and tested the video transmission over wifi. I contrast to the last test this environment was free of other wifi networks. So this fits more the usual FPV environment.
I’ve mounted the standard 3dBi dipole at a height of 50cm for tx and used my double biquad on the rx side. Air data rate was 26mbit/s which allowed me to transfer 5mbit/s of video data at a retransmission rate of 3.
The results were quite promising. The longest line of sight (with a some trees in between. Actually the perfect line of sight was not usable since my FPV system guard insisted on a bench 😉 ) I’ve found in that park was 500m. At that distance there wasn’t a single packet drop. Thus the video stream was perfect. That is quite good for HD video transmission at 100mW (which means it’s perfectly legal to use). This is a satellite image of the setup:
The RSSI at 500m was at -70dBm. I’ve found that with the 3dBi dipole on the RX side at 300m I was still able to receive a more or less usable video. This was received with a RSSI of -82dBm. So I’m quite confident to reach 1km with the double biquad and the antenna more elevated (-> in the air on the quad).