7-20 PN: 10580-00343 Rev. H S820E UG
7-5 Calibration Menu Calibration, VNA
Interpolation
You can set your instrument to interpolate the calibration coefficients of a
Standard mode calibration. After performing a Standard calibration, you can
turn Interpolation On and then change the frequency range (smaller and
anywhere within the calibrated range) or change the number of data points.
You cannot increase the frequency range beyond the range that was used
during calibration. The submenu key is “Interpolation (On Off)” on page 7-19.
For example, you could perform a calibration from 1 MHz to 40 GHz using
4001 points. With Interpolation On, you could then make a measurement by
zooming in on a desired frequency range, 410 MHz to 435 MHz for example.
The trace in your measurement would use of the full 4001 points within this
much narrower frequency range. With Interpolation Off, the instrument
would use only the number of points that were calibrated within this
narrower frequency band, which would be a much smaller number of points.
Cal Correction
Cal Correction is turned on automatically after the calibration process has
been completed successfully. When Cal Correction is On, the calibration
coefficients are applied to the measured data, resulting in corrected
S-parameter data. You can turn Cal Correction Off, which results in trace
data using uncorrected (or raw) S-parameter data.
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