Sony VPH-G90E Manuel D'installation page 150

Link Functions List of the Projection Distance by Angle of Optical Axis
How the PIC ORBITING and SCAN LINE SHIFT functions work
150
(GB) Others
PIC ORBITING
Shifts the picture horizontally and vertically by 10 steps each in the
directions of the arrows shown below.
10 steps
10 steps
10 steps
The picture moves through an 80-step cycle in 60 minutes.
(Hc SHIFT: 20 steps × 2 = 40 steps, Vc SHIFT: 20 steps × 2 = 40 steps)
SCAN LINE SHIFT
Shifts the scanning lines vertically by 20 steps each in the directions of the
arrows shown below.
20 steps
20 steps
One cycle for SCAN LINE SHIFT is 80 steps in 10 minutes.
(Vf CENT: ± 40 steps)
Note
The picture shifts up, down, left and right by 10 steps each in PIC
ORBITING mode, and it shifts up and down by 20 steps each in SCAN
LINE SHIFT mode. Before using the linked picture orbiting function,
adjust the picture size and position so that the picture orbiting can work
successfully.
Picture
10 steps
Picture