First High End radio tested. First up is the Futaba 4PK. Having a super fast update rate of 300hz to the servo it stand out compared to the cheap lineup. The avg and max delays are as expected very good compared to the others.
Avg 10.29
min 6.25
max 18.86

But looking at what happens and how fast it does things it is clear that update rate is not everything, from the time you move the steering until the correct signal is at the servo it have already sent 2-5 updates that are wrong until it have the latest signal. So Futaba have alot of room for improvement here, and other radio manufactures might do things quicker.

Also it updates all servo at the same time instead of one after another, something i expected you must do if you want to get the maximum update rate. But it is the first time I have seen it in the logical analyzer. If you don't go parallel you can never get a 4 channel radio to update faster than about 80 hz.

The friend that let me test his radio also had 2 different receivers and the older FASST-C1 version R604FS was about 1ms slower on everything.