Rohde & Schwarz R&S ZNA Series - Page 97

Getting Started
R&S
®
ZNA
97User Manual 1178.6462.02 ─ 29
R&S ZNA67 connector Ext. test set connector Used at frequencies
Conv LO Out Converter p LO IN via power divider HIGH
p = 1, 2 for systems with 2 external test sets
p = 1, ..., 4 for systems with 4 external test sets
Some of the RF connections are only used while the network analyzer operates in the
low frequency range (below approx. 67 GHz) or in the high frequency range (above
approx. 67 GHz). However, to ensure full flexibility and maximum accuracy, it is recom-
mended to establish all RF connections.
To get accurate measurement results, use high-quality cables with low attenuation and
excellent phase stability. Rohde&Schwarz offers suitable cable sets fro GORE
®
, see
"Cable sets (optional)" on page 98.
RF input power
The RF input power at the connectors RF IN and LO IN of the converters must not
exceed the maximum values quoted in the data sheet. Because these maximum val-
ues are below the maximum RF source power of the R&S ZNA, the R&S ZNA has to
be configured carefully, before establishing these connections. Selecting the
"ZNA67EXT-TS" converter type ensures compatible source powers (see Chap-
ter 3.5.7.2, "Converter configuration", on page 100).
Proceed as follows:
1. Ensure that the converter is in standby state or disconnected from the power sup-
ply (see "Standby switch" on page 86).
2. Make sure to select the "ZNA67EXT-TS" converter type for each converter port of
the VNA (see Chapter 3.5.7.2, "Converter configuration", on page 100).
3. Connect the RF input and output connectors of the diplexers and the frequency
converters as shown in Figure 3-21.
Repeat this procedure whenever you are not sure whether a suitable converter config-
uration is already active. Switching the VNA off and on preserves the converter config-
uration.
Converter configurations can be saved and loaded via the graphical user interface of
the R&S ZNA.
("Save Converter Topology..."/"Load Converter Topology..." on the Frequency Con-
verter tab)
Getting started with R&S
ZNA67EXT