What step should be performed at the beginning of every fusion splicing operation?

The correct answer emphasizes the importance of making a number of test splices at the beginning of every fusion splicing operation. Test splices are crucial as they allow the technician to validate the performance and reliability of the fusion splicing equipment and techniques being utilized. By performing test splices, any potential issues related to alignment, pressure settings, or environmental factors can be identified and corrected prior to conducting the actual splicing work on the live fibers. This step helps ensure that the splice quality is optimal, minimizing the risk of splice failure in the finished work.

Gathering all required materials, preparing the work area, and running a diagnostic test on the equipment are also important steps in the fusion splicing process, but they do not specifically address the immediate need to confirm the functionality and accuracy of the splicing equipment directly before starting the operation. Hence, performing test splices first can save time and prevent problems that could arise from a faulty setup or inadequate preparation.