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9.5 Range Configuration
Setting the range as close as possible to the actual length of the fiber under test will result in far greater
accuracy when testing.
Range Options: Auto, 1.3km, 2.5km, 5km, 10km, 20km, 40km, 80km, 160km, 240km, etc.
Operation:
Select the range desired.
Note:
●
If the user selects “Auto” for the test range, the OTDR will attempt to determine the range
automatically. It will also automatically choose a pulse width.
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By default, the OTDR module is set to “Auto.”
9.6 Pulse Width Configuration
Pulse width selection affects the trace dynamics and resolution. Selecting a smaller width to test can
achieve a higher distance resolution and smaller dead zone, but it affects the dynamics. Conversely,
selecting a wider pulse width can achieve higher dynamics, and can be used to test longer distances, but
will affect the resolution and dead zone.
Operation:
Select the pulse width value.
Note:
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Default value: Auto
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When the distance range is “Auto”, the pulse width will also be automatically determined. The pulse
width will adjust itself according to the distance range.
9.7 Averaging Time Configuration
Test times affect the test trace Signal-to-Noise-Ratio (SNR). The longer the test time, the higher the SNR
and the greater the dynamics. Consequently, when testing long-distance optical fiber, select a longer test
time to achieve greater resolution and accuracy.
Operation:
Click the time span duration in the time span area of [Settings].
Note:
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Averaging Time Options: Auto, Quick, 15s, 30s, 45s, 60s, 90s, 120s, 180s, etc.
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The factory default value is 60 seconds.
9 Test the optical fiber in Manual mode