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The reflection rate of an optical fiber affects the transmission speed of the light
on the optical fiber. Therefore, setting of the reflection rate directly affects the
accuracy of measured distance. Generally, the reflection rate of an optical fiber is
provided by the manufacturer of the optical fiber. It can be set to any value between 1.0
and 2.0. The value has a precision of four decimal places.
On the parameter setup page, press [
▲
] or [
▼
] to select Reflection rate. Press [Enter]
to enter or [ESC] to exit from the reflection rate setup page, as shown in Figure 3-16.
Figure 3-16 Setting the reflection rate
Press [ ] or [ ] to select the digit to be modified, and press [
▲
] or [
▼
] to modify
the value of the selected digit. After modification is completed, press [Enter] to make
the setting effective and press [ESC] from the setup page.
Setting the End Threshold
This threshold is the fiber end threshold. If the end threshold is set to 3.0 dB, the
first event with the insertion loss equal to or higher than 3.0 dB on the test trace is
regarded as the end of the optical fiber.
On the parameter setup page, press [
▲
] or [
▼
] to select End threshold. Press [Enter]
to enter the end threshold setup page, as shown in Figure 3-17.
Figure 3-17 Setting the end threshold
