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Camera Controls 67
A plastic shield protects the display from scratches. It can be removed by pulling it off
the four pins.
13.1.2 Screen Buttons
Six screen buttons are located above and below the LCD display. Their function varies
depending on the screen content and is shown directly above or below each button.
If no function is shown above or below a button on the LCD, it has no function for that
screen.
As a failsafe, operations that cannot be reversed and can result in the loss of data
require pressing two buttons simultaneously to confirm the operation.
13.1.3 HOME screen
The HOME screen is the ALEXA’s default screen. It shows the most important camera
parameters and gives quick access to changing them through the screen buttons. To
return to the HOME screen from any menu in the camera, press the HOME button.
NOTICE
To adjust the LCD brightness from the HOME screen, rotate the jogwheel while
pressing the BACK button.
Screen buttons
Button Function
FPS Sets the frame rate of the sensor.
AUDIO Shows the current audio level. If AUDIO is set to Off, the audio
input is switched off: no audio is embedded in the HD-SDI out-
puts, and no audio tracks are recorded onto internal media. The
same applies if AUDIO is disabled, which is the case if the sen-
sor frame rate is different from the project fps setting (for exam-
ple, while over- or undercranking).
SHUTTER Sets the shutter angle of the sensor. Shutter angle and sensor
fps determine exposure time of the sensor in seconds by the fol-
lowing equation: angle / (360 * fps).
EI Sets the exposure index rated in ASA. The ALEXA has a base
sensitivity of 800 ASA.
Note: ASA rating is identical to ISO rating.
Note: Exposure Index is not applied to ARRIRAW signals.
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