Regarding optical power measurement, what is typically included in the input of optical receivers?

The inclusion of a DC voltage test point in the input of optical receivers is significant because it allows for real-time monitoring and measurement of the power levels being received. Optical receivers convert incoming optical signals into electrical signals, and the DC voltage produced can be directly correlated with the intensity of the incoming light. This voltage provides crucial feedback for assessing the performance and functionality of the optical receiver, making it a standard feature in many designs.

In contrast, while the other options may seem relevant, they do not typically represent standard features of optical receivers. Testing points for signal strength or fiber connections could be present in certain contexts, but they do not capture the essential electrical characteristics that a DC voltage test point provides. An RF output connection might be part of some integrated systems but is not intrinsically linked to the basic functionality of optical input measurement in most optical receivers. Hence, the inclusion of a DC voltage test point is key to the operational and diagnostic framework surrounding optical power measurement.