Array Solutions AIM4170 - Appendix 5 - Scan Data File Format

Antenna Analyzer AIM4170 page 44
Appendix 5 – Scan Data File Format
The scan data can be saved in two different formats that are suitable for importing into
spreadsheets or plotting programs.
In one file with the extension “.csv”, only the basic data is saved in the following order:
Frequency in MHz, SWR, Rseries, Xseries, Zmag, Theta(deg), Reflection coefficient,
Return loss(dB), Percent reflected power.
The data values for one frequency are all on one line and are comma delimited.
This file can be easily imported into a spreadsheet for detailed analysis.
Another file with the extension “.scn” is saved with more information about the
conditions of the scan. A detailed example is show below.
// The comments are not included in the actual file.
// Parameters included in this file: SWR, Rseries, Xseries,
// Zmagnitude, Theta
//
// If the equivalent parallel load circuit is needed:
// Rparallel=Zmag*Zmag/Rseries
// Xparallel=Zmag*Zmag/Xseries
//
09-08-05 10:57:33 // first line, date and time of the scan
110 // program version (changes if the data format
// changes)
20 // number of data points minus 1 :
// (there are 21 data blocks below)
12 // scan start frequency (MHz)
22 // scan end frequency
0.500000000000000 // step frequency between test points
12 // freq at left side of graph plot (MHz)
22 // freq at right side of graph plot (may not be
// the same as "scan end freq"
10 // swr full scale
1000 // z magnitude full scale
100 // theta full scale (degrees)
22.500000000000000 // not used
0 // not used
0 // not used
0.500000000000000 // freq spacing between major vertical lines on
graph
1 // plot_swr flag (1=true)
“comment string” // graph comment string, if any.
1010.010620117187500 // SWR : Start of data blocks; 5 items per block
// repeated 21 times in this example
0.892523407936096 // Rseries : equivalent series resistance of load
206.328903198242190 // Xseries : equivalent series reactance of load
206.330841064453120 // Zmagnitude : magnitude of load impedance
1.566470623016357 // Theta : angle of load impedance, radians
440.064605712890620 // next SWR
2.952029705047607 // next Rseries, etc