Hitachi SU-1000 Operating Instructions Manual page 18

Facility names and functions (Front)
PIX / WFM select
A5
Scene file select / Shutter,GAIN,ND,CC select
A6
S Camera select
A7
Select the camera
STATUS off: not connected , yellow: camera power off , green: camera power on (normal state)
TALLY red: red tally , green: green tally , yellow: both red and green tally on
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