The one I'm using has one and I don't know what the exact time is. I could try with trial and error, but I'm wondering if there's any info and what it is?

Quick Google search has people saying anything from 2 to 5 seconds for the HD PVR 2. You're probably just gonna have to do the trial and error.

Nail on the head. I utilize the Hauppauge HD PVR 2 myself and settled it by means of along these lines also. Likewise, remember that in case you're utilizing a webcam or some other gadget to catch your responses, you'll need to postpone that in the OBS properties for that gadget, too! 192.168.100.1 192.168.1.1