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The Agilent 816x VXIplug&play Instrument Driver Lambda Scan Applications
236 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition
Equally Spaced Datapoints
A linear interpolation is performed on all wavelength and power data for
the Lambda Scan Application and is optional for the Multi Frame Lambda
Scan Application.
The advantage of spacing all measurements equally is that presenting
results through use of a spreadsheet is greatly simplified. The operation
returns one wavelength array and a power array for each power meter
channel.
The disadvantage of using equally spaced datapoints is that the linear
interpolation is analogous to the use of a low pass filter. Figure 18 shows
the original curve as measured directly by a Power Meter and the
interpolated curve.
Interpolation will always tend to produce a smoother curve by rounding off
any peaks in the curve.
Figure 18 Equally Spaced Datapoints
Original
Curve
Interpolated
Curve
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