Keysight Technologies FieldFox A Series User Manual page 679

File Management
Saving and Recalling Files
About SNP Files
The SNP file includes header information, and the following data:
— S1P - saves 1-port (receiver) data for the active data trace. *.s1p Files
— S2P (NA Mode ONLY) - saves 2-port data for the active trace. *.s2p Files
— Only data traces are saved – not memory traces.
Corrections
— When parameters are corrected, data is returned even when not displayed.
— When parameters are NOT corrected or displayed:
> Display formats
In CAT Mode, S1P files are always Magnitude (dB) / Phase (angle) format.
In NA Mode:
— Smith chart and Polar display formats are ALWAYS saved in Real/Imag data
— All other display formats are saved in LogMag/Phase (dbAngle).
> What Data Processing functions are included in saved SNP Data:
In NA Mode, the data processing functions (such as trace math) that are
included in the SNP data depends on a Preference setting. Click System, then
Preferences, then Preferences, then scroll to NA, SNP File Save, then select
from the following:
Keysight N9927-90001 User's Guide
— Data (S1P) / (S2P)
*.S2P file, depending on the active measurement. This file format is
used by CAE programs such as Keysight's Microwave Design System
(MDS) and Advanced Design System (ADS). It can also be imported
into spreadsheet software such as Microsoft Excel.
contain 1 stimulus value and 1 S-parameter (total of 3 scalar values) Stim
Real(Sxx) Imag(Sxx)
contain 1 stimulus value and 4 S-parameters (total of 9 scalar values) Stim
Real(S11) Imag(S11) Real(S21) Imag(S21) Real(S12) Imag(S12)
Real(S22) Imag(S22)
Data is returned with the correction type that is applied for each
S-parameter. The correction type for each S-parameter is annotated in the
header.
— With Smith chart and Polar formats, Real/Imag zero-filled data
appears as (1.0, 0.0).
— With all other formats, LogMag/Phase zero-filled data appears as
(0.0, 0.0).
pairs.
Saves CAT and NA Mode trace data to an *.S1P or
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