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1601 Equodistont
Point Arroy
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F r o m o C o m p u t e r
User Flatness Correction Arroy
1 6 0 1 P o i n t s o f I n t e r n a l
Calibration Data
freq. span between correction entries
F-8 Operating and Programming Reference
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 CW 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.
Number --+ 0
Point
Frequency --) 2GHz
Array Configuration when the Correction Data Frequency Span
is a Subset of the Swept CW Generator Frequency Span
Number of points interpolated between correction entries is
calculated as follows:
stop frequency - start frequency
When correction frequencies are arbitrarily spaced, the number of
interpolated points varies.
No Corrections Applied
1 s t Cow. F r e q .
Figure F-4.
1600 - 1 = Number of pts
I
1601
Points
for ALC
1600
1200
o f
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