R&S ZNB - Page 248

Concepts and Features
R&S
®
ZNB/ZNBT
248User Manual 1173.9163.02 ─ 55
Example:
The 4x24 extension of switch matrix R&S ZN-Z84 consists of 2 separate 2x12 subma-
trices, where matrix VNA ports of the "left" submatrix cannot be connected to the test
ports of the "right" submatrix and vice versa. If none of the two VNA ports of a subma-
trix is connected, obviously no connection between the VNA and the submatrices' test
ports can be established and hence reflection and transmission measurements are
impossible.
Right 2x12 submatrix
full crossbar
R&S ZNx
Left 2x12 submatrix
full crossbar
not connectable
R&S ZN-Z84
4x24
VNA ports
Matrix VNA ports
Matrix test ports
Transmission measurement possible
A C B D
13 14 15 16 17 18 19 20 21 22 23 24
7 8 9 10 11 121 2 3 4 5 6
Figure 5-24: Unconnected right submatrix
With the same extension type, connecting one of two submatrix VNA ports enables
reflection measurements for the corresponding matrix test ports. However, as long as a
second connection between the VNA and this submatrix is missing, "intra-submatrix"
transmission measurements are still impossible.
Right 2x12 submatrix
full crossbar
R&S ZNx
Left 2x12 submatrix
full crossbar
… possible
R&S ZN-Z84
4x24
VNA ports
Transmission measurement
not possible
A C B D
13 14 15 16 17 18 19 20 21 22 23 24
7 8 9 10 11 121 2 3 4 5 6
… not possible
Figure 5-25: Partially connected submatrices
Basically the same argument holds true for variant 16 of switch matrix ZV-Z82, which
consists of 4 separate 1x4 submatrices and that allows "inter-" but no "intra-submatrix"
transmission measurements.
Optional Extensions and Accessories