The maximum allowable end-to-end loss is defined by which concept?

• A. Power penalties
• B. Receiver dynamic range
• C. Link Loss Budget
• D. Attenuation

Answer: (C)

The maximum allowable end-to-end loss is defined by the Link Loss Budget. This budget represents how much total signal loss from transmitter to receiver can be tolerated while still meeting the receiver’s minimum input requirements. It’s determined by subtracting the receiver’s minimum required input power (sensitivity) from the transmitter’s output power, and then applying a design margin for aging and component variability. All actual losses along the path—fiber attenuation, connector and splice losses, and any additional penalties—must not exceed this budget. If the path losses exceed the budget, the link won’t meet performance targets. Attenuation is the actual loss in a section of the link, not the total allowable loss; receiver dynamic range refers to the range of input powers the receiver can handle; power penalties describe performance degradations rather than the overall limit.