Originally Posted by Roelof (Post 15975107)

That is SXR?
Pfew 1500Hz, I wonder if someone can feel a difference between SUR and SXR. Althougd I did read some people can feel a difference between SSR and SHR (same frame speed but only a shorter pulse) but I think it is more like a placebo effect.

Originally Posted by gigaplex (Post 15975109)

There's another factor not many people consider in the SSR vs SHR debate. Microcontrollers have a finite timer resolution. I built a USB dongle adapter for VRC Pro using an Arduino, which by default has a 4us resolution on the timer function in the standard code library. I wrote a custom timer that knocks the resolution down to 0.5us. The SHR range is 1000-2000us, a 4us resolution means there are 250 steps between the min and max values. Each step has an error of 0.4%. SSR has a range between 50us and 550us, which means a 4us resolution has 125 steps, with an error of 0.8%.

Even when switching to the 0.5us timer in my code, there was still quite a bit of jitter in the recorded interval in SSR mode. It was visible in the software calibration screen. That suggests that the interrupts of the micro weren't consistently firing on time, or the signal from the receiver itself had some timing resolution errors. An oscilloscope would be able to verify the latter, which I don't have access to.