Chapter 4 Changing Measurement Conditions
4-10
To set sampling point count:
1. Press
f6 Sampling
Points
.
2. Select the numeric value from
f1
to
f6
.
The sampling point count is the number of points within the sweep width
where data is captured. When the number of sampling points is small, the
measurement time is shorter. However, sometimes the measurement may
be inaccurate, depending on the relationship between the sweep width
and the resolution. Set the number of sampling points so that the
following relationship is satisfied.
If the number of sampling points is smaller than the right-hand value,
“Res Uncal” is displayed on the right lower side of the screen.
P > = Span / Res + 1
P: Sampling point count
Span: Sweep width (nm)
Res: Resolution (nm)
Example: When the resolution is 0.1 nm at a sweep width of 50 nm,
P > = 50/0.1 + 1 = 501.
Set 501 or more sampling points at this time.
The internal minimum resolution is 1 pm. If a smaller resolution is set,
the waveform will be displayed at a resolution of 1 pm.
To display actual resolution:
1. Press
f7 Act-Res
On/Off
.
The measurement condition field displays the actual resolution at
the Center wavelength.
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