1132
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Lines 2 through 5 can be empty but must appear in the file. Lines 6 through 11 are optional, the lines can
be left out of the file altogether.
The Overlap row and the two Bias rows apply only to external mixing. Both are read-only, they are
never written by the analyzer. The only way to insert or modify these rows is to edit the file with a text
editor or a spreadsheet editor. These rows are intended for use by mixer manufacturers, as they allow the
manufacturer to insert data about how the mixer corrections were generated and how they should be
applied. The Bias rows allow you to specify whether to turn Bias on or off when the Correction is turned
on and to specify a Bias value (turning off the Correction does not change the Bias, but turning it back on
again sets it to the value specified in the file). The Overlap row allows you to specify an overlap region
in which two different corrections may be applied. It is expected that in the corrections data itself, there
will be TWO corrections values exactly at Max Freq, otherwise Overlap is ignored. The way the overlap
is processed is as follows: if at any given time the current analyzer Start Freq is greater than Freq 1 and
lower than Freq 2, and the current Stop Freq is greater than Freq 2, extend the first correction point at or
above Freq 2 down to Freq 1, rather than using the correction data between Freq1 and Freq2.
The Antenna Unit row can only be used in Correction register 1, because there can only be one setting
for Antenna Unit at any given time. If a Correction whose Antenna Unit is set to anything but None is
loaded into any Correction register but 1, an error is generated (Mass storage error; Can only load an
Antenna Unit into Correction 1). When a correction file is saved from any Correction register but 1,
Antenna Unit is always written as None.
Similarly, the Bias rows can only be used in Correction register 1, because there can only be one setting
for Bias at any given time. If a Correction file with a Biasor Bias State row is loaded into any Correction
register but 1, an error is generated: Mass storage error; Can only load Bias Settings into Correction 1
The data follows the DATA row, as comma separated X, Y pairs; one pair per line.
For example, suppose you have an Antenna to correct for on an N9020A version A.02.06 and the
correction data is:
• 0 dB at 200 MHz
• 17 dB at 210 MHz
• 14.8 dB at 225 MHz
Then the file will look like:
• Amplitude Correction
• "Correction Factors for 11966E"
• "Class B Radiated"
• A.02.06,N9020A
• P13 EA3 UK6,01
11 Overlap, two values, Freq1
and Freq2, separated by
commas.
Overlap,33500,40000 Uses Freq Unit from line 6. Thus, in
this example Freq1=33.5 GHz, Freq2=
40.0 GHz (see note below). If omitted
leaves the overlap unchanged (added as
of A.08.50)
12 DATA marker DATA Corrections data begins in the next line