Sokkia CX Series Operator's Manual page 23

Operation panel
"5.1 Basic Key Operation"
Display unit
Softkey selection
Guide light
Guide light
Guide light
Setting-out measurement etc. can be carried out effectively using the Guide
light. The Guide light is composed of a light that is divided into a red and a
green light. A poleman can ascertain the present position by checking the
Guide light color.
Star key
green red
(When seen from the objective lens side
while the instrument is in the Face 1 state)
4. CX FUNCTIONS
Illumination key
Power key
13