Keysight x-series User Reference Manual page 690

9 Strip Chart Measurement
Save
Line
# Type of field
8 Freq Interpolation
9 Bias value in mA
10 Bias State
11 Overlap, two values, Freq1
and Freq2, separated by
commas.
12 DATA marker
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
690
Example
Frequency Interpolation,Linear
Bias,0.00
Bias State,On
Overlap,33500,40000
DATA
Notes
if omitted leaves the Freq Interpolation
unchanged. Allowable values: Linear,
Logarithmic
If omitted leaves the Bias value
unchanged (added as of A.08.50)
If omitted leaves the Bias State
unchanged. Allowable values: On, Off
(added as of A.08.50)
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)
Corrections data begins in the next line
EMI Receiver Mode Reference