Thought the image from DJI FPV system look good? Now it will look even better with the higher bitrate setting from the latest 01.00.60 update on 8th of July 2020. The original 25Mbps bit-rate can be bumped up to 50Mbps.
Mbps = Mbit/s, this is the amount of data transferred per second. By doubling the data rate to 50Mbps, the image will look much clearer with more detail, however it doesn’t come without downsides.
Here is some sample footage how it looks. Recorded in DJI FPV Goggles, High Quality, Auto Focus, 50Mbps. This is what I see in the goggles!
How to Enable 50Mbps?
Flash the latest firmware on your DJI gear, V1.6 or newer (how to update firmware).
The 50Mbps bitrate option is only available in FCC mode, in CE mode, the bitrate option is greyed out and fixed at 25Mbps. How to enable FCC mode on your Air Unit or Caddx Vista.
Go to Settings in the OSD menu, under Transmission, Bitrate, and select 50Mbps.
For the ultimate experience, consider setting focus mode to Auto to minimize blur on the sides.
And make sure you select either Channel 1, Channel 2 or Channel 3. If you select Channel 8 (public channel), your bitrate will be limited to 25Mbps.
Downsides of 50Mbps
In order to achieve double bitrate, the DJI FPV system uses two channels to transmit the video signal and therefore the number of channels available in your DJI FPV goggles will be reduced to 3 (plus public channel 8).
If you only see 2 channels instead of 3, just reset your goggles.
This also means more interference to people flying analogue since the band DJI is using is now much wider. To play well with analogue pilots, it’s better to use 25Mbps.
If you don’t normally fly with other people, this shouldn’t be a problem and there is no reason not to use 50Mbps.
As for latency, it seems to be on par with 25Mbps.
However, Audience mode doesn’t work when 50Mbps mode enabled (on the date of publishing).