Product Info

OTDR

Figure 4.4-1 Link parameter setting page

Helix Factor：It is used to represent the actual length of the optical cable. The

optical fiber revolves around the central axis in the optical cable tray. If it is

necessary to test the length of the optical cable, the Helix Factor needs to be used.

After setting the Helix Factor, the measured "position / length" follows the

following formula: D (position, length) = (1 - reinforcement coefficient) *

measured value.

To define the actual pitch starting point of the fiber, you can set the starting

fiber length. When testing the equipment, connect a starting optical fiber between

the equipment and the tested optical fiber. This is why the fiber pitch includes the

startup fiber by default. When defining the length of the start-up fiber, the

application sets the fiber diameter at the beginning of the measured fiber.

Therefore, only events related to the defined fiber diameter are considered. The

application will include the loss caused by the pitch start event in the displayed

value. The radial distance start event will also be considered in determining the

loss and reflectivity status of the machine (pass / fail). The starting point of the