Concepts and Features
R&S
®
ZNB/ZNBT
226
User Manual 1173.9163.02 ─ 38
Measurement process for external generators
The measurement process for
external generators
"Gen 1", "Gen2" ... differs from the
measurement process for internal source ports:
●
An external generator always represents a permanent signal source that is
switched on for all partial measurements. In contrast, an analyzer port is switched
off for partial measurements that do not require a source signal.
Exception:
Internal ports can be configured as permanent sources; see "Gen" set-
ting in the "Define Arbitrary Frequency" dialog ("CHANNEL > CHANNEL CONFIG
> Port Config > Arbitrary Frequency...").
●
The external source is measured in the first partial measurement where an internal
source is active. This means that no separate partial measurement for the external
generator signal is needed. If no internal source is needed at all, the external
source is measured in the first partial measurement.
4.7.20 External Switch Matrices
4.7.20.1
Overview
From the perspective of the VNA, the purpose of a switch matrix is to extend the num-
ber of test ports, i.e. to convert an N-port network analyzer into an N'-port network ana-
lyzer (N'>N) without modifying the instrument itself. The increased number of test 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
ZNB 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.
Optional Extensions and Accessories
