... 8 hours of operating life ο Visible fault locating (VFL) and optical power meter ο Universal FC/PC,FC/SC,FC/ST connector type ... connected.In average measurement mode, the noise in trace can be suppressed, and the SNR(signal noise ratio) is improved, therefore,the result ... , the more average times is executed, the more noise in trace is suppressed, and the longer time is spent for signal processing ...