How does Argus measure jitter?

[Nik Mitev]

Hi,

I am looking at the possibility to use our existing Argus installation
to monitor jitter and packet loss. My concern is that, especially with
udp traffic, Argus is likely to be effectively guessing the jitter
amount rather than doing reliable measurements and blurring the
difference between delay introduced by software at end points and true
network delay.
I am hoping that someone will prove me wrong :)

What formula/algorithm does Argus use for jitter measurement?

Cheers,
Nik