2-22
IM AQ7280-01EN
Adapt Trace (Waveform editing)
In an optical fiber cable measurement, reducing the pulse width of optical pulse measurement
increases the measurement resolution of the waveform in the near-end section but causes the optical
pulse to attenuate in the far-end section, preventing correct measurement. Conversely, increasing
the pulse width of optical pulse measurement allows correct measurement in the far-end section but
decreases the measurement resolution of the waveform in the near-end section. The Adapt Trace
feature compensates for these measurement accuracy degradations by performing optical pulse
measurement using three different pulse widths for the same wavelength and combining the three
waveforms on the screen. The AQ7280 automatically determines the pulse widths depending on the
specified distance range and wavelength.
Measurement
waveform using a
narrow pulse width
(Trace1)
Increased waveform resolution
When the distance is long,
measurement is not possible.
Measurement
waveform using a
wide pulse width
(Trace3)
Decreased waveform resolution
Measurement waveform
using an intermediate
pulse width
(Trace2)
Events far away
can be measured.
Events in mid-range
can be measured.
Adapt Trace
Pulse width
(narrow)
Pulse width
(intermediate)
Pulse width (wide)
You can change the effective range of Trace1 to
Trace3 by moving the lines marking the sections.
Note
Adapt Trace turns on and off automatically depending on the loaded waveform data.
• When waveform data in SMP format is loaded, Adapt Trace is turned on.
• When waveform data in SOR format is loaded, Adapt Trace is turned off.
2.3 Performing Averaged Measurement and Displaying the Results with Icons (/SMP option)