Panasonic P2HD VariCam AJ-HPX3700G Operating Instructions Manual page 119

When making the white shading correction, make the
adjustment while observing the R, G, and B waveforms in
the horizontal and vertical directions with the waveform
monitor.
This now completes the white shading adjustments.
The adjustment values are now stored in the non-volatile
memory so that even when the unit's power is turned off,
there will be no further need to perform the white shading
adjustment.
119
Preparation: Mounting the lens and Performing the Flange Back and White Shading Adjustments