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IM AQ1210-01EN
• Switching the Display between TRACE Mode and MAP Mode
4.
Tap the TRACE/MAP button to set the data display screen to MAP mode.
When the data display screen is in MAP mode, the button is TRACE.
Executing an Averaged Measurement
5.
Tap Wavelength to set the wavelength.
6.
Press AVG. The measurement begins, and the data display screen shows the waveform.
During averaged measurement, the duration to average over is displayed in the top area of the screen.
Also, during measurement, a mark appears at the top of the display to indicate that the laser light is on.
When averaged measurements are completed, measurement is stopped automatically, event analysis is
executed, and the analysis results are displayed on the screen. If you press AVG again during averaged
measurement, measurement is stopped.
Note
• You can select the initial screen that appears when the instrument starts in system settings. For details on
operation, see the explanation in section 10.1.
• If distance range and pulse width are set to auto, the instrument automatically selects the optimal values
internally immediately before starting a measurement. Change these values if necessary. For details, see
section 2.1.
Explanation
Averaged Measurement (AVG)
In averaged measurements, the data that is acquired from each pulse is averaged, and then event
analysis is performed. Averaged measurements improve the signal-to-noise (S/N) ratio. This is
effective when you want to detect faint events that are buried in noise.
Distance Range
With the auto setting, the instrument detects the open end (end point) at the start of an averaged
measurement and automatically calculates the length of the optical fiber cable. When setting the
distance range manually, set a distance range appropriate for the length of the optical fiber cable to
be measured. For details on the appropriate distance range, see section 2.1.
Pulse Width
With the auto setting, when the distance range is set to auto, the minimum pulse width that can
measure the distance to the open end (end point) is selected. When setting the pulse width
manually, set a pulse width appropriate for the distance range. For details on the appropriate pulse
width, see section 2.1.
4.2 Measuring in MAP Mode
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