PTP 450i: How to reduce jitter?

Sure, the jitter is perfectly fine and it works great.

I wanted to know if it's possible to achieve this result :-)

Here's link eval result.

SNR is different between upload and download because transmit power is different, but the link is very good.

At this time I can see:

Path V:QPSK:28% 16-QAM:28% 64-QAM:22% 256-QAM:22% 
Path H:QPSK:26% 16-QAM:25% 64-QAM:24% 256-QAM:24%