ARRI ALEXA Series User Manual

Main Controls 73
The MON OUT should match the sensor and the REC OUT frame rate. If
the sensor frame rate exceeds the available MON OUT frame rates, set
the MON OUT to half the sensor frame rate if possible to maximize the
smoothness of the image when panning and tilting.
To correctly set frame rates for the REC OUT:
1. Press the MENU button.
2. Using the jogwheel, select the Recording menu.
3. Select REC OUT.
4. Set Frame rate to the desired frame rate. This frame rate should
match the frame rate setting on the external recorder.
5. If the desired sensor frame rate is a standard speed, set REC OUT
fps sets sensor fps to On.
6. Press the HOME button to exit.
To correctly set frame rates for the MON OUT:
1. Press the MENU button.
2. Using the jogwheel, select the Monitoring menu.
3. Select MON OUT.
4. Set Frame rate to the same frame rate as the REC OUT. If the REC
OUT frame rate exceeds the range of the available MON OUT frame
rates, set the MON OUT frame rate to half the value of the REC OUT
frame rate.
5. Press the HOME button to exit.
To set a non-standard frame rate for the REC OUT:
1. Press the MENU button.
2. Using the jogwheel, select the Recording menu.
3. Select REC OUT.
4. Set REC OUT fps sets sensor fps to Off.
5. Press the HOME button to exit.
6. On the HOME screen, press the FPS button.
7. Select the desired frame rate from the list or add a user-defined
frame rate (see Adding a list value in Lists and User Lists).
High Speed Mode
If a valid High Speed license key is installed on the ALEXA, frame rates
from 60.000 to 120.000 fps are available in 16:9 High Speed mode, and
from 48.000 to 90.000 fps in 4:3 ARRIRAW High Speed mode. Frame
rates below 60.000 fps in 16:9 and 48.000 fps in 4:3 are not available.
Exit High Speed mode to record with lower frame rates.
High Speed mode recording is possible only to internal recording
media, not via the REC OUT outputs. When High Speed mode is loaded,
the REC OUT outputs switch output paths and carry the MON OUT
signal with a maximum frame rate of 30 fps.

ARRI ALEXA Series Specifications

General

Dynamic Range	14+ stops
Resolution	4.5K (ALEXA LF), 6.5K (ALEXA 65)
Recording Formats	ARRIRAW, Apple ProRes
Lens Mount	PL mount
Viewfinder	Optional EVF (Electronic Viewfinder)
Sensor Size	Super 35 (most models), Large Format (ALEXA LF, ALEXA 65)
ISO Range	EI 160 - EI 3200 (Base ISO 800)