RTA Question using REW

In the spectrum, which indicates positive or negative phase for say, H2? Does the polarity of the harmonics change sign?

Thank you!

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Click the settings (cog) at the top right and select 'Distortion Settings' and then check the box for 'Show Phase of Harmonics'. +90 degrees H2 is (maximum) negative phase and -90 degrees is (max) positive phase if I am not mistaken, and you will see a phase angle beside the harmonic value in the distortion panel.
 
Don’t completely trust the polarity, or at least that’s been my experience. Gear that I know to have a -90deg H2 are always represented as +90deg. Could be my setup, but it’s worth taking the polarity with a grain of salt.
 
Thank you for the tip codyt!
I am playing with my BA3-FE. So far, - phase on H2 seems to move the vocals or soloist farther back from the listener and + phase towards the listener. Reference is at minimum H2 and H3 as set by P3. I confirmed that CW or CCW from this point of lowest H2/H3 will increase H2 and will let you decide which polarity to go .
 
What twitchie said. I've tested with REW and DiAna and -90 degrees H2 on REW is shown as positive phase on DiAna.
 

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