Marlow
lvl.2
Flight distance : 37316 ft
Ireland
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Over the last few months testing, I've come to a few conclusions and these are not really that well documented .. if at all.
- LB1 Airunits do not like anymore more than 4S. Yes, they're spec'd to 6S, but it really fries/scrambles/screws with the Linux partition on the airunit and renders them useless. The remote control portion will continue to work. It's best to feed them with a 12V UBEC, if you are running a system with power bigger than 4S. So the DIY wiring documentation on the DJI Wiki is an absolute NO GO for 5S or higher voltage systems, unless you add a UBEC. It's not only the NAND that gets destroyed by the higher voltages, but also some internal interface functions. There's a good reason, why the LB2 only takes up to 12v'ish.
- DJI will replace the Airunit (or Groundunit) on warranty once. Even now. But once it has been replaced, they'll charge 350+ bucks for it.
- GoPro Hero4 v5 firmware and also the latest firmware for the Hero3+ won't play with LB1 HDMI at all. And there has been no firmware updates from DJI since to cope with that. Probably never will be. The Thieye T5e (and probably every other camera with the Ambarella chipset) works perfectly with HDMI with LB1. Using the analog output on GoPro Hero cams with the LB1 also works perfectly.
- LB1 will not supply telemetry, once there is no video signal. So if you have no camera signal, your camera is off or you've flown out video range, you loose telemetry ... full stop. Remote control will still work. It seems that the remote control portion is in the lower 2.4GHz band, the video in the upper 2.4GHz band, so video dies before remote control does.
- When the LB1 encoder partition is bugger, the remote control part still works. Matter of fact, may people using bigger rigs with LB1 will never notice, that their encoder is fried, the reason being, that with the Zenmuse Z15 gimbals (Panasonic/Sony/Canon), the GCU handles the encoder part and the LB1 still looks like it works (HD Gimbal portion).
If you adhere to above bits and bobs, LB1 airunit shouldn't really go wrong and I've only ever managed to reflash one once .. out of 10's of attempts. It's a nightmare. Groundunits however, should they go wrong, are easy enough to reflash and work fine after doing that.
Just my 2c. I have 5 airunits and 4 ground units, so I've had my fare share of hardship with these. The problem is: there is very little on the market, that does quite the same as LB1. Even Lightbridge 2 feels like a downgrade, when you've been using Lightbridge 1.
/M
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