7 Save/Recall/Print
7.3 Save
Line # Type of field Example Notes
on transducer correction data, refer
to the Input/Output, Corrections key
description. Allowable values:
dBuV/m, dBuA/m, dBG, dBpT, None
8 Freq
Interpolation
Frequency Interpolation,
Linear
if omitted leaves the Freq
Interpolation unchanged. Allowable
values: Linear, Logarithmic
9 Bias value in mA Bias,0.00 If omitted leaves the Bias value
unchanged (added as of A.08.50)
10 Bias State Bias State,On If omitted leaves the Bias State
unchanged. Allowable values: On,
Off (added as of A.08.50)
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
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 instrument. 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
instrument 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.
Only one Transducer units can be on at any given time. Note that this means that if a
correction file with a Transducer Unit is loaded into a particular Correction, all other
Corrections are set to that same Transducer unit. Note that the legacy term
“Antenna Unit” is still used in the correction file, even though the more modern term
“Transducer Unit” is used in the user interface.
2615 Spectrum Analyzer Mode User's &Programmer's Reference
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