I've just made the jump from Traktor (using an S4) to Pioneer hardware, and I've noticed that you cannot fine-adjust the tempo using the jog wheel to get two tracks exactly in phase.
Please try understand what I am saying here: Let's say for the sake of simplicity that I load the same track into both decks and set them to 0.00% pitch. Now I want to beat match the second deck to the first (without using sync). What I find is that if the phase is off very slightly (I'm talking sub 50 millisecond range), the jog wheels do not respond to slow rotations in order to pull the tracks into phase.
Unlike with Traktor hardware, it seems that there is a "minimum acceleration" required for the jogs to detect a tempo bend. With my S4, I could rotate the jogs however slowly I desired, and the track would respond accordingly -- by microscopically adjusting its phase over time.
I've noticed this same behaviour with club units such as the CDJ2000. Unless I use a certain speed or acceleration to bump the jogs, nothing is detected - even if I slowly make multiple full rotations of the platter, the two tracks will remain the same amount out of phase.
This is rather annoying since to correct for the small phase offset, I usually end up over-correcting (even with the minimum amount of force I can physically apply to get some detection). I end up over-correcting backwards and forwards until by chance the bend lands the tracks in phase.
Is this a design choice by Pioneer? A hardware limitation? Is there really no way to fine-adjust by slowing rotating the jogs? Please, before you respond, confirm this for yourself. The speeds I'm talking about are about 1 rotation per 5 seconds.