The Panasonic AC160 and the HPX250 menu is a little different from the usual P2 series. If you are shooting a CRT monitor screen, the sync scan setting can come in very handy.
Press the Dial Select Button (White arrow in picture) until the shutter speed appears on LCD. Then use the Shutter/Frame rate dial till you see the shutter indicating 1/50.0 (make sure the .0 appear like the yellow arrow in picture). Then once again press the Dial Select Button until the sync scan speed appear on screen. Using the Dial Select Button, you can now fine tune the 1/50.0 to the setting you require.
This function can help reduce or eliminate scrolling CRT monitor due to differing refresh rates.