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How Does OTDR Deal With Blind Spots In Actual Testing?

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2018-07-18
Tianjin Wenhao Technology and Development Co., Ltd.

A series of "blind spots" are often referred to as blind areas, resulting in saturation of the OTDR receiver caused by reflection of feature points such as active connectors and mechanical connectors.

The blind area in optical fiber is divided into event blind area and attenuation blind area: The reflection peak caused by the intervention of the active connector, from the starting point of the reflection peak to the length distance between the saturation peak of the receiver, is called the event blind area, and the reflection peak in the fiber is caused by the interventional active connector, from the starting point of the reflection peak is known as a attenuation blind zone. For OTDR, the smaller the blind area, the better. The blind area will increase with the increase of the width of the pulse widening, while increasing the pulse width increases the measurement length, but also increases the measurement blind area, so when testing the fiber, the measurement of the fiber and adjacent event points of the OTDR attachment should use a narrow pulse, while the wide pulse should be used to measure the distal end of the fiber.

How Does OTDR Deal With Blind Spots In Actual Testing?

How Does OTDR Deal With Blind Spots In Actual Testing?

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