EXFO TG-300B Tone Generator - Manual (Page 7)

TG-300B/LFD-300B FiberFinder 2
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Tone recognition LEDs: Indicate if a tone of 270 Hz, 1 kHz, or 2 kHz was
recognized by the LFD­300B.
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Traffic LEDs: Indicate the presence and direction of the traffic as follows:
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When the Traffic LED on the left-hand side is lit, the traffic is coming from
the right.
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When the Traffic LED on the right-hand side is lit, the traffic is coming from
the left.
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Fiber Finder LED: Indicates if the low-frequency modulation (specific to the
TG­300B) was detected by the LFD­300B.
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Fiber Modulator LED: Indicates if the low-frequency modulation was emitted by
the TG­300B.
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Positioning LED: Blinks while the clamping mechanism presses on the fiber.
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ON/OFF and battery status LED: Is constantly lit while the unit is running and
blinking when the batteries are low.