Alexa 35

Connection

The Alexa 35 provides 24V DC and Ethernet via a single Lemo connector at the rear of the camera. The power provided is sufficient to power the bitbox, though we cannot recommend or advise using other accessories with this port.

Alexa 35 Ethernet Port Location — Alexa 35 ethernet port location

IP Address Configuration

Open Menu → Communications → Network / WiFi

Set WiFi Power to Off to minimize WiFi spectrum use for the rest of the set.

Set LAN IP Mode to Static

Set Lan Static IP and Lan Static Subnet (see this article for more information):

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It is very important to leave the LAN Static Gateway blank in a static configuration. While this is required for some workflows, it will intermittently break normal communication.

Arri Camera Access Protocol (CAP) Configuration

Arri CAP is required to use Arri’s excellent Companion application, which is currently in a public beta test program. You can sign up for the test on Arri’s website.

Open Menu → System → Camera Access Protocol (CAP)

Enable CAP by setting the Enable CAP server checkbox, you will then need to set a password in the CAP server Password submenu. By default it is “arri”.

Arri Web UI

No additional configuration is required to utilize Arri’s Web UI. It is in many ways inferior to Companion for day-to-day use, and we recommend utilizing the new application. In a Chromium-based browser (we recommend Vivaldi), you simply need to enter the camera’s IP address that you set above.

Common Issues / Troubleshooting

I have set the IP address but still cannot get a response from the camera

Confirm that you have signal as indicated by the status lights on the bitbox. If you do, it is most likely an IP configuration issue. Double check all settings and confirm that the subnets match.

Ethernet link intermittent or not coming online

We have seen certain instances where the ethernet interface of the Alexa 35 will not recognize a 10/100 device plugged into it and will not come online. We have a patch for this in the bitbox firmware, though it was not deployed until Q3 2024. If you have a box older than that and have never had a firmware update, email us at [email protected].

Poor Companion Performance

If your companion configuration includes a “Web UI” tile, remove it and you will likely see improved performance at greater range.

Web UI Slow / Unresponsive

The Web UI requires a fair bit of data throughput which can cause issues at longer distances. You will find much better long range performance with the Arri Companion app.

Live Grade crashes or becomes unresponsive on look update via CAP

Disable Image Capture in the CAP settings menu of Live Grade

Cabling

Bit Part manufactures a custom cable compatible with Alexa 35, Alexa 265, and Alexa Mini LF that provides Ethernet and power in one convenient package. It is available in our store. We also manufacture an Anglissimo Lemo version which features a rotatable connector.

Knowledge Base