As the new ImmersionRC Receivers (UNO 5800 v2 / DUO5800 v3) use “Nexwave” Chips, they should outperform the old Airwave Receivers.
Maybe that’s true because basically the Nexwave System is based on the popular Sky RF Chip which Foxtech also uses in their systems and that chip has -90db instead of -85db (airwave chip).
Since Foxtech seems to have some quality issues (buy 10 new receivers from Foxtech and find be suprised how different they all perform), we want to give those Nexwave Receivers a chance.
So i bought a new UNO5800 v2 for testing and borrowed a UNO5800 v1 (airwave chip) + 600mW Tx from one of my FPV buddies, for testing.I also wanted to compare those to my RC305 Foxtech Receiver + 400mW Tx (of course, the 600mW ImmersionRC Setup should outperform the foxtech setup, just because of those 200mW more power).
We placed a copter with the transmitters installed on a high platform and the receivers on the groundstation in 1.5km and 2.5km distance. We used the same SPW antennas on all transmitters and receivers.
Saldy youtube and it’s strong video compression don’t like grainy videos, so much details was compressed away, but i can tell you that there is a difference between all three test videos.
In 1.5km distance the UNO v1 (airwave) showed a descent picture with little color noise, but also with many black dots in it. During flights, I noticed that those black dots are often combined with stronger distortions and short drop outs.
But our test setup is placed on the ground, not moving anything, so it’s hard to tell how stable the link would be during flight.
The UNO v2 produced a slightly sharper image with more contrast/details and without any black dots. The color noise is the same, as with the UNO v1.
Foxtechs RC305 + 400mW Tx gave us pretty much the same image, as the UNO v2.
Next test in 2.5km.
Still a solid and descent Image on the UNO v1 but again with many black dots. Our UNO v2 produced a picutre that was slightly better and without black dots. The Foxetch Setup showed much color noise now, because of 200mW less power, than the ImmersionRC Setup, but with solid and usable quality.
In all tests, the upper part of the video was shaky, when we used the ImmersionRC systems, whereas the Foxtech picture was absolutely solid. I often heard about that problem and I’m not sure if the cam (Sony SUPER HAD II CCD cam), the Tx or the Rx is causing that problem.
It would have been too much work to do this comparison during flight, because of the high output power. We would have to fly 2-3km away every time to see a difference, but I hope i can get my hands on a 25mW ImmersionRC transmitter, so we can compare it against the Foxtech 25mW Tx (the one which is labeled as 10mW) during flight (no need for long range to see a difference when using 25mW).