Agilent Technologies FieldFox N9912A User Manual page 137

About SNP Files
 Phase data is NOT available for port 2 (RF IN port).
 The SNP file includes header information, and the following data:
 Data is returned with the correction type that is applied for each S-parameter.
 Only the data trace is saved – not the memory trace.
 In CAT Mode, S1P files are always Magnitude(dB) / Phase (angle) format.
 In NA Mode, SNP files for traces in Smith Chart or Polar format saves
 Trace Math is ignored when saving data to an SNP file.
File Management
Saves CAT and NA Mode trace data to an *.S1P or *.S2P
Data (S1P) / (2P)
o
file, depending on the active measurement. This file format is used by CAE
programs such as Agilent's Microwave Design System (MDS) and Advanced
Design System (ADS). It can also be imported into spreadsheet software
such as Microsoft Excel.
S1P - saves 1-port (receiver) data for the active data trace. *.s1p Files
o
contain 1 stimulus value and 1 S-parameter (total of 3 scalar values)
Stim Real(Sxx) Imag(Sxx)
S2P (NA Mode ONLY) - saves data for two S-parameters (S11, S21) if they
o
are both displayed. *.s2p Files 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(S2
Zeros are returned for S12, and S22 parameters and for S21 phase. When
2)
both are corrected, data is returned for both S-parameters, even when not
displayed. The data for all S-parameters are written to an S2P file according
to the format of Trace 1. When the format is Mag/Phase, zero-filled data
appears as 0 dB and 0 degrees. When the format is Real/Imaginary, zero-
filled data appears as (1,0).
The correction type for each S-parameter is annotated in the header.
Real/Imaginary format. All other trace formats are saved in Mag/Phase format.
Data (csv) Saves trace data from the current Mode to a *.csv file. This
o
format can be imported into spreadsheet software such as Microsoft Excel.
o In SA Mode, all visible data traces are saved. Each trace is saved to a
separate column that is labeled with the Trace State.
o In CAT and NA Modes, only the data trace is saved – not the memory
trace.
o In Power Meter and VVM Mode, NO data is saved.
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