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CODEX ONBOARD RECORDER – RECORDING ARRIRAW 2160p Rev10.01.2012 PAGE 3

GPO Polarity: Low or High

These should describe the type of electrical GPI trigger that is being used. These items are ignored if “Record

Trigger” is set to “None” or “SDI”.

Menu: SETUP->SYSTEM (“SYSTEM SETUP”)

The Codex Onboard has an ethernet port which allows it to be connected to standard computer network

infrastructure. The network IP configuration can be set here:

IP: 10.82.95.101

Mask: 255.255.255.0

Gateway: 10.82.95.1

DNS: INVALID

It is necessary to configure the network port if you wish to use the remote user interface (UI) software to

control the Codex Onboard recorder. The software is currently available for Mac OSX and Windows, but its use

is outside the scope of this document.

The “System control” setting determines whether remote UI software is allowed to take control of the recorder.

This can be set to “Locked” to prevent a network user from taking control of the recorder.

System control: Unlocked

The next three settings determine the brightness level of the Codex light rings and the remote handset‘s LCD

display. The user can pick a level in the range 0 (dim/off) to 15 (bright), and the default level is 12.

Screen contrast: 12

Control ring bright: 12

Main ring bright: 12

If the Onboard recorder receives power from the Alexa’s 24V regulated RS power output, then there is no

benefit in enabling a shutdown voltage level:

Shutdown volts: Disabled

4.3 During a shoot: Video/Audio/Timecode settings

Here we describe the menu pages that are likely to be used on a day-to-day basis during a shoot; VIDEO,

AUDIO, and TIMECODE.

Menu: SETUP->VIDEO (“VIDEO SETUP”)

To configure the recorder for Alexa Studio 4:3 ARRIRAW, set the “Format” to “ARRIRAW-2160p”. This will also

set the “Storage” and “Quality” settings, and will limit the "Fps" to the supported frame rates.

Format: ARRIRAW-2160p [This is the technical name for 4:3 aspect ARRIRAW]

Storage: 12-bit Bayer

Fps: 23.98, 24.00, 25.00, 29.97, 30.00, 48.00 [this must match the camera REC OUT video rate]

Quality: 1:1 [uncompressed]

Channels: 1 [single camera into one Onboard recorder]

Aspect: Square [for spherical lenses] or x2 Anamorphic

The Alexa firmware from V3.0 onwards supports variframe flags over the HD-SDI outputs, so it is now possible

to record ARRIRAW at non-HD speeds such a 27fps. When shooting variframe you must ensure that:

The Onboard recorder’s “SETUP->VIDEO->Variframe” setting is set to “On”.

The Alexa’s “MENU->RECORDING->REC OUT->Variframe flags” setting is set to “On”.

The camera's REC OUT is set to a frame rate that is equal to or higher than the frame rate you wish to

capture.

For example, to capture 27fps you would have to set the camera REC OUT to 29.97 or 30.00, and configure

the recorder to match.

Important Note: The Alexa will not warn you if the REC OUT is not set to a high enough frame rate or if the

variframe flags are disabled, so be extremely careful when using the variframe function. You can confirm

successful variframe recording on the Onboard by entering the Options menu from the Monitor/Rec screen,

and setting the Tc Source to POS (position), which will then advance as frames are recorded. Also, the Review

button should be used to confirm recording.

Audio capture on the Onboard recorder is disabled and also it will only record ‘flagged’ frames when in

variframe recording mode, so It is good practice to set the Onboard recorder‘s variframe setting to “Off” when

shooting at normal HD frame rates (23.98, 24.00, 25.00, 29.97, 30.00, 48.00).

Variframe: Off or On

Remaining settings:

Input: 3G

Output: Duplicated [forces both monitoring video outputs to be 4:2:2 single link]

Play Sync: Internal [Genlock source for playback]

Note: For single link 3G use Input 1. For dual link 3G use inputs 1 and 3.

Menu: SETUP->TIMECODE (“TIMECODE SETUP”)

If you require that the timecode for the ARRIRAW footage exactly matches the timecode recorded to in-

camera SxS media, then you must set “TC source: HD VANC”.

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