Concepts and features
R&S
®
ZNB/ZNBT
157
User Manual 1173.9163.02 ─ 62
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
ZNB/ZNBT makes an exception to the strict "ascend-
ing 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
ZNB/ZNBT arranges the frequency value f and
network 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
