What is typically the first action taken when adjusting an optical receiver?

The first action taken when adjusting an optical receiver is typically turning on the optical receiver. When starting any troubleshooting or adjustment process, it is essential to ensure that the device is powered and operational. This foundational step allows technicians to monitor the receiver's performance, check signal levels, and determine if further adjustments are necessary.

Without powering on the optical receiver, no readings or adjustments can be effectively made, as the device will not be processing any incoming optical signals. Once the receiver is turned on, technicians can proceed with inspection, calibration, and configuration, which depend on the functionality of the device.

Although other actions, such as inspecting the power source or checking the network configuration, are critical steps in maintaining optical receivers, they come after establishing that the receiver is powered and functioning. Therefore, starting with turning on the optical receiver is crucial for any subsequent actions to be meaningful in the adjustment process.