Looks like you have one of our Gen 1 sensors. The vertical field of view in our OS1 changed from 33.2 to 45 degrees when we launched Gen 2 sensors.
You can download all documentation for your sensor from our download center. [https://ouster.com/downloads/]
Make sure you select hardware version as Gen 1 and whichever firmware you have installed.
We also recommend to upgrade the firmware to the latest version to get the most out of your lidar.
Sylvia, Ouster EMEA