Match each technical excerpt regarding military fiber-optic communication systems with the statement that best describes the author's primary purpose.
- When field technicians encounter severe optical loss across a tactical fiber link, they must first inspect all end-face connectors with a video microscope before attempting re-splicing. Airborne particulate debris and microscopic oil films account for most signal attenuation issues, making thorough dry-cloth cleaning the essential first corrective action.To explain the proper troubleshooting sequence and initial remediation for signal attenuation in field links.
- Single-mode optical fiber utilizes a narrow core diameter to transmit a single light path across dozens of kilometers with negligible pulse dispersion, whereas multimode fiber features a wider core allowing multiple light modes to travel simultaneously. While multimode hardware is less expensive to install, single-mode infrastructure provides the high bandwidth required for long-range data feeds.To contrast the technical specifications and operational trade-offs between two types of optical fiber.
- Personnel working around active optical transmitters must never look directly into disconnected fiber ferrules or unsealed bulkhead adapters. Invisible infrared emissions can cause irreversible retinal burns within fractions of a second without triggering a natural blink reflex; therefore, laser safety goggles rated for infrared wavelengths are mandatory during testing.To warn maintenance personnel about the severe hazards of invisible laser emissions and mandate safety protocols.
Answer
Excerpt 1 matches the purpose of explaining the proper troubleshooting sequence and initial remediation for signal attenuation; Excerpt 2 matches the purpose of contrasting the technical specifications and operational trade-offs between two types of optical fiber; Excerpt 3 matches the purpose of warning maintenance personnel about the severe hazards of invisible laser emissions and mandating safety protocols.
Each excerpt has a distinct rhetorical function signaled by its structure and vocabulary: the troubleshooting excerpt instructs technicians on handling signal drop; the comparison excerpt evaluates the structural and practical differences of two fiber media; and the hazard excerpt cautions against physical harm from invisible laser light.
Step-by-Step Solution
Key Concept
Author's Primary Purpose
Estimated Time:1m 30s