R&S 1323.7600.02, Getting Started

Page: 22 / 48

RF connections
R&S
®
ZCxxx
22 Getting Started 1177.5156.02 ─ 05
Therefore always use an appropriate torque wrench, suitable for the type of con-
nector. Rohde & Schwarz offers an optional 5/16” torque wrench that fits for SMA,
3.5 mm, 2.92 mm and 1.85 mm connectors (R&S
ZN-ZTW variant 35). Similar
wrenches are available for other sizes of spanner, too. For ordering information,
see the R&S
ZCxxx data sheet or product brochure.
5.1 Connection procedure
The RF input power at the connectors RF IN and LO IN of the R&S ZCxxx must
not exceed the maximum values quoted in the data sheet. Because these maxi-
mum values 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.
A converter configuration via the graphical user interface of software option
R&S
ZNA-K8 ensures compatible source powers. Therefore, proceed as follows:
1. Make sure the R&S ZNA is already running.
2. Connect the frequency converters to their power supply R&S ZCPS and
power up the R&S ZCPS.
3. Establish USB connections between the frequency converters and the
R&S ZNA.
The R&S ZNA then registers the converter, i.e. it reads and persists the char-
acteristic data of the R&S ZCxxx.
4. At the analyzer GUI:
a) Make sure the R&S ZNA firmware has registered all your converters.
Otherwise reestablish the USB connection.
b) Define and configure your converter setup, as described in Chapter 6.3,
"Configuring the converter setup" , on page 27.
Now the RF and LO cables can be connected safely.
Connection procedure