Exfo FTB-635 Wideband Copper and DSL Test Module Uživatelský manuál stáhnout pdf (Strana 280)

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Impulse Tests

272 FTB-635

WB Impulse Noise Test

 Impulse Separation Time defines the shortest time between

consecutive discrete impulses, and is used for centering the impulse

on the graph. This separation time also defines the largest allowable

gap between threshold events within a single impulse.

 Import from Impulse Scope button allows you to import the Impulse

Separation Time value from Impulse Scope.

 Plot Interval allows you to define the time period to display the

impulse noise spikes on the graph.

Setting Threshold Values

The Test Thresholds page allows you to set the WB Impulse Noise

Threshold values for the test.

To set the threshold values:

1. From either the WB Count or WB Histogram tab, tap the Edit

Thresholds button to open the Test Thresholds page.

2. Set the threshold values as required.

3. Tap Close to confirm and close the page.

The page allows you to set the following parameters:

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