ORIGINAL: Zor
We cannot get better resolution than the servos are capable of resolving no matter what the feeding rate to them is. Advertising higher resolution like 2048 does not change the ability of the servos to deliver. That is just a marketing gimmick as far as I understand.
Any comments posted would be nice to read.
A few notes:
1) You're right, you cannot get better resolution than the servos can deliver. However, there are detectable differences between resolutions even with poor servos. For instance, compare the same servo with PCM-512, PCM-1024, and a 2048 system like Spektrum (use a high-end rx and tx to see it). You will see a difference.
2) It's not just a marketing gimmick. High quality servos will show that even more. If you choose to fly crappy servos, then you won't get resolution and your aircraft will fly accordingly.
It's not just the signal to the servo, it's the math leading up to it too.
Andy