Concepts and features
R&S
®
ZNA
155
User Manual 1178.6462.02 ─ 20
Network parameter data
The network parameter data section contains one block of network parameters per fre-
quency point. Each block is preceded by a frequency value, i.e. the first entry in the
first (or only) data line of a data block is a frequency value. The complex network
parameter data is formatted as pairs of values. The following general rules apply
●
Individual entries in a network data line are separated by whitespace
●
In version 1.1 files, no more than four parameters are allowed per network data
line. No restriction exists on the number of data pairs on a line in version 2.0 files.
●
The network data blocks are arranged in ascending order of frequency
For segmented sweeps, the R&S
ZNA makes an exception to the strict "ascending
order" principle. During export, the segments are always kept together, which can
result in downward "frequency jumps" at segment borders.
Data arrangement
During export, for each block the R&S
ZNA arranges the frequency value f and net-
work parameter data (
Nij
)
1≤i,j≤n
as described in the Touchstone 1.1 standard.
●
n = 1
f N11
●
n = 2
f N11 N21 N12 N22
●
n = 3, 4
f N11 N12 N13
N21 N22 N13
N31 N32 N33
Similar matrix arrangement for n=4.
●
n > 4
For n > 4, the "max. four parameters per data line" restriction applies. It is over-
come by wrapping the matrix rows at multiples of four network parameter values.
For n = 9:
f N11 N12 N13 N14
N15 N16 N17 N18
N19
N21 ...
N95 N96 N97 N98
N99
f N11 N12 N13 N14
N15 N16 N17 N18
N19
N21 ...
N95 N96 N97 N98
N99
The data blocks are arranged in ascending order of frequency.
Operations on traces
