Problems with the new phone

yangsqr

I previously used an iPhone 12 Pro, it could receive and record 25Hz data normally. Recently, I switched to an iPhone 17 Pro. On the recording page, the GPS data shows 25Hz (occasionally dropping to 24.x frames, just like before), which is fine. However, when I open the recording playback, it only shows 20Hz data recording (this also happens on the Android phone). Both iphones are running iOS app 10.1.3. How do I adjust the settings?

aol

The 20 Hz is showing for the calculated channels, which is the internal update rate for those channels. Look at the GPS channels for GPS update rate.

yangsqr

Thanks! I didn't understand the difference between calculated channels and GPS channels before, but I got now.

Could it be understood that even if the GPS input signal is 25Hz, it will be processed as 20Hz by racechrono when processing the data?

aol

yangsqr Only those calculated channels. Lap timing etc. is calculated from 100% of the GPS plots.

yangsqr

Got it, Thanks for your reply.