R&S ZNB Series - Page 272

Concepts and features
R&S
®
ZNB/ZNBT
272User Manual 1173.9163.02 ─ 62
Example:
The 4x24 extension of switch matrix R&S ZN-Z84 consists of 2 separate 2x12 subma-
trices. 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 submatrix is con-
nected to the VNA, then obviously you cannot use the test ports of this submatrix for
measurements.
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 4-28: 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 4-29: 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