Rohde & Schwarz R&S ZNA Series - Intermodulation measurement results

Concepts and features
R&S
®
ZNA
267User Manual 1178.6462.02 ─ 29
O U T O U T
ININ
MEASSO URCEREF
O U T O U T
ININ
MEASSOURCEREF
Figure 4-23: Direct access to lower-tone port, external combiner
The lower tone is generated at a VNA port, the upper tone is also provided by the ana-
lyzer (4-port models only) or by an external generator. The signals are combined exter-
nally and fed to the SOURCE IN connector at the lower tone port. Thus the superim-
posed signals are available at the lower tone port and can be fed to the DUT input. The
IF output signal is measured at another VNA port.
As an alternative to the test setup with external combiner, you can also combine the
two tones using the coupler in the test set of the upper-tone port:
O U T O U T
ININ
MEASSO URCEREF
O U T O U T
ININ
MEASSOURCEREF
Figure 4-24: Direct access to both ports, coupler as combiner
With frequency converters, only external combination of the converter RF out signals is
supported. For all measurements involving two-tone stimuli and a receiving converter
port (intermodulation, two-tone group delay), a 4-port R&S ZNA is required.
Intermodulation measurement results
The intermodulation measurement provides two different types of results:
●
In the swept measurement, the analyzer performs a frequency or power sweep of
the two-tone stimulus signal and displays the selected intermodulation quantities
as a function of the lower-tone frequency or power.
Optional extensions and accessories