Hitachi HV-F31F - Manual (Page 43)

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microscope variable magnification.
(3) (A.E) GATE (CSR: F200 0078 h)
AUTO EXPOSURE signal detect area (8 x 8) can be set as desired.
-OFF-
Setting value 80000000 h
The screen overall video signal is detected for AUTO EXPOSURE control.
-ON-
Setting value 82000000 h
GATE for detecting the AUTO EXPOSURE video signal is set in lines 1-2 to 7-8. The area is not
shown on the screen.
a) (A.E) GATE line1-2 (CSR: F200 007C h)
-Manual adjustment-
Setting value 820xx0yy h
xx: LINE 1 ON/OFF data
yy: LINE 2 ON/OFF bit map data
b) (A.E) GATE line3-4 (CSR: F200 0080 h)
-Manual adjustment-
Setting value 820xx0yy h
xx: LINE 3 ON/OFF data
yy: LINE 4 ON/OFF data
c) (A.E) GATE line5-6 (CSR: F200 0084 h)
-Manual adjustment-
Setting value 820xx0yy h
xx: LINE 5 ON/OFF data
yy: LINE 6 ON/OFF data