HP 8360 B Series User Manual page 216

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1601 Equadistant
Point Array
Accessible Only
From a Computer
User Flatness Correction Array
1601 Points of lntemol
Calibration Data
freq. span between correction entries
stop frequency - start frequency
F-8 Operating and Programming Reference
When user flatness correction is enabled, the sum of the two arrays
produces the 1601 reference voltages for the ALC system.
Figure F-3. The Sources of ALC Calibration Correction Data
If the correction frequency span is only a subset of the start/stop
frequency span set on the source, no corrections are applied to the
portion of the sweep that is outside the correction frequency span.
The following example illustrates how the data is distributed within
the user flatness correction array.
Assume that the swept signal generator is set to sweep from 2 to
18 GHz, but you only enter user flatness correction data from
14 to 18 GHz. Linear interpolation occurs between the correction
entries to provide the 401 points required for the 14 to 18 GHz
portion of the array. No corrections are applied to the 2 to
13.99 GHz portion of the array. Refer to Figure F-4.
Point Number --) 0
Frequency --) 2GHz
Array Configuration when the Correction Data Frequency Span
is a Subset of the Swept Signal Generator Frequency Span
Number of points interpolated between correction entries is
calculated as follows:
of Correction
No Corrections Applied
1st Corr. Freq.
Figure F-4.
1600 - 1 = Number of pts
I
1601 Paints
for ALC
1200 1600
o f D a t a