Exfo FTB-8500 Series for FTB-500 Manual do Utilizador descarregar pdf (Página 374)

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Advanced Tab

360 FTB-8500 Series and FTB-8120NGE/8130NGE

Service Disruption Time (SDT)

 Unit: Select the unit for the statistics. Choices are μs, ms, s, and min.

The default setting is ms.

Note: When the measured SDT is equal or longer than the Test Period, then the

SDT equals the Test Peri o d tim e .

 Service Disruption: Indicates the time (in seconds) during which

there is a disruption of service due to the absence of traffic or to the

detection of defects. The H and C LEDs indicate respectively the

current (C) and history (H) SDT measurement states.

The C (Current) LED is red if there is an SDT, and lasts until the next No

Defect Time period for Defect Mode, and until the next frame for the

No Traffic Mode. For No Traffic Mode, the LED will only turn red when

the No Traffic Mode period has been reached or exceeded. The C LED

is green when there is no SDT. After an SDT with Defect Mode, the C

LED will only turn green after the No Defect Time has been met.

The H (History) LED indicates if any SDT occurred in the past (LED is

red) or not (LED is green).

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Exfo FTB-8500 Series for FTB-500 Manual do Utilizador Página 374

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