R&S ZNB Series User Manual page 270

®
R&S ZNB/ZNBT
ports can reduce or even eliminate the manual reconnections of the DUT, resulting in a
higher measurement speed, reliability and repeatability.
The firmware of the R&S ZNB/ZNBT is able to control switch matrices from Rohde &
Schwarz directly. For example, a 4-port R&S ZNB8 in combination with two R&S ZN-
Z84 can work as a multi-port network analyzer with up to 48 ports, seamlessly perform-
ing the required matrix switching operations.
Figure 4-27: R&S ZNB connected to two R&S ZN-Z84, each equipped as 2x24 matrix
While it is allowed to connect multiple matrices to a R&S ZNB/ZNBT, matrix cascading
is not supported.
An N-port analyzer is always limited to measuring N signals simultaneously. I.e. even
though the DUT is fully connected to the switch matrix, youcannott measure all its b-
waves simultaneously. For example, consider a DUT with 6 unbalanced ports, connec-
ted to a 2-port analyzer via a 2x6 matrix (e.g. a R&S ZN-Z8x base unit without exten-
sions). For each stimulus port, 5 sweeps are required to measure the resulting b-
waves, 6·5 = 30 sweeps in total.
User Manual 1173.9163.02 ─ 62
Concepts and features
Optional extensions and accessories
270