Chapter 8 287
Analysis and Processing of Result
Save and Recall the Agilent 4294A Internal Data
8. Analysis and Processing
of Result
Now look at the structure of data saved in the touchstone format. The data can be divided
into the option line and data lines.
The option line starting with "#" is placed at the beginning of the file. The structure of the
option line is as follows. Table 8-20 shows the meaning of each symbol.
# <Frequency u
nit> <Parameter> <Format> <Characteristic impedance>
Table 8-19 Example of data saved in touchstone format
#_KHZ_S_MA_R_50‹
1.00000000000e-01_3.33525005034e-01_-7.73675665259e-02‹
4.00009600000e+03_3.33353237003e-01_9.86914411187e-02‹
8.00009200000e+03_3.33415398880e-01_1.85199186206e-01‹
1.20000880000e+04_3.33583392524e-01_2.72698938847e-01‹
1.60000840000e+04_3.33311851436e-01_3.00653338432e-01‹
2.00000800000e+04_3.33375343866e-01_3.66584867239e-01‹
2.40000760000e+04_3.33422417685e-01_4.29817110300e-01‹
2.80000720000e+04_3.33443503503e-01_4.86124992371e-01‹
3.20000680000e+04_3.33431173499e-01_5.43855965137e-01‹
3.60000640000e+04_3.33431097810e-01_5.90200841427e-01‹
4.00000600000e+04_3.33366487197e-01_6.40886545181e-01‹
4.40000560000e+04_3.33259086931e-01_6.97765290737e-01‹
4.80000520000e+04_3.33099293459e-01_7.51655459404e-01‹
5.20000480000e+04_3.32939275455e-01_8.12797546387e-01‹
5.60000440000e+04_3.32774633027e-01_8.78330588341e-01‹
6.00000400000e+04_3.32566849713e-01_9.49001610279e-01‹
6.40000360000e+04_3.32357601579e-01_1.02763938904e+00‹
6.80000320000e+04_3.32137379193e-01_1.11495888233e+00‹
7.20000280000e+04_3.31905989161e-01_1.20526015759e+00‹
7.60000240000e+04_3.31703851783e-01_1.30251085758e+00‹
8.00000200000e+04_3.31460080009e-01_1.41421270370e+00‹
8.40000160000e+04_3.31262034449e-01_1.52120709419e+00‹
8.80000120000e+04_3.31105522810e-01_1.64604377747e+00‹
9.20000080000e+04_3.30970807903e-01_1.77705621719e+00‹
9.60000040000e+04_3.30877281129e-01_1.91649520397e+00‹
1.00000000000e+05_3.30887617271e-01_2.05756402016e+00‹
Symbols in the table ‹ : return, _ : tab
Table 8-20 Structure of option line
Symbol Description
# Indicates that this line is the option line.
<Frequency unit> Indicates the frequency unit. For the 4294A, it is fixed to kHz.
<Parameter> Specifies the type of parameters in data lines. For the 4294A, "S"
is specified that indicates the S parameter.
<Format> Specifies the format. For the 4294A, "MA" is specified that
indicates the format using an absolute value and phase.
<Characteristic
impedance>
Specifies the characteristic impedance. For the 4294A specified
is "R 50", meaning 50 W.
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