R&S 1332.4500K22, User Manual

Page: 281 / 1709

Concepts and features
R&S
®
ZNA
281 User Manual 1178.6462.02 ─ 20
Source
Ref Meas Src
Mon
Out
Out
In
Src
Step
Att
Rec
Step
Att
Port y = 1, 3
In Out
Ref Source Meas
Out
Out
In In
Port y
Src Mon Out
Figure 4-38: B16 jumpering for direct source monitoring
●
Options R&S ZNAxx-B161/163 are only available with hardware option
R&S ZNAxx-B16 (see Chapter 4.7.26, "Direct generator/receiver access" ,
on page 277). Furthermore:
–
R&S ZNAxx-B161 requires R&S ZNAxx-B21
– R&S ZNAxx-B163 requires R&S ZNAxx-B21 and R&S ZNAxx-B23
(see Chapter 4.7.28, "Source step attenuators" , on page 278)
●
Upgrade kits R&S ZNAxx-U161/U163 are available to retrofit direct source monitor
access, with the same logic and prerequisites as for options R&S ZNAxx-
B161/163. The R&S ZNA must be sent to Rohde & Schwarz service though.
4.7.34 Internal combiner
Option R&S ZNAxx-B213
On a 4-port R&S ZNAxx with hardware option R&S ZNAxx-B2 13 , the source signals
generated at physical ports 1 and 3 can be internally combined and routed to port 1.
No external combiner or additional cabling is needed. The performance loss of using
the coupler as combiner is avoided.
An internal combiner is particularly useful for Intermodulation measurements and
Embedded LO mixer group delay measurements , that require a two-tone signal.
It is possible to switch the combiner on or off between channels.
Optional extensions and accessories