Setup and operation with R&S
ZVA/ZVT
R&S
®
ZCxxx
39
Getting Started 1177.5156.02 ─ 05
Connection Procedure
1. Connect the frequency converter to the power supply R&S
ZCPS and power
up R&S
ZVA/ZVT and R&S
ZCPS.
2. Establish a USB connection between frequency converter and VNA
.
3. At the analyzer GUI, when prompted to configure a two-port measurement
setup, select "Yes"
Now the RF and LO cables can be connected safely.
You have to repeat this procedure whenever you are not sure if the fre-
quency converter mode for your particular R&S
ZCxxx model is already
active.
Switching the VNA off and on preserves the selected frequency converter
mode.
A.1.2
Connecting the input connectors (RF IN, LO IN)
The type of cable required for connecting the input connectors depends on the
type of the network analyzer / external generator. Since the converter inputs are
fitted with 2.92 mm female connectors, the cable should ideally have male con-
nectors of the same type (e.g. R&S
ZV-Z195, order number 1306.4536.xx). Alter-
natively, 3.5 mm or SMA male connectors are possible. These are mechanically
compatible with 2.92 mm connectors while providing tolerable electrical mismatch
(e.g. R&S
ZV-Z193, order number 1306.4520.xx).
For a complete test setup for a 2-port transmission measurement – as shown in
– a cable length of about 1 m is recommended. For a setup with only
one converter shorter cables may be sufficient. Always use cables with low
attenuation and excellent phase stability.
Depending on the VNA model, additional 1.85 mm to 2.92 mm adapters may be
required to connect the cables.
1. Connect port 1 or port 2 of the analyzer to RF IN of the converter.
2. Connect port 3 or port 4 of the analyzer to LO IN of the converter.
For VNAs with 4 sources (R&S
ZVA24 var. 28, R&S
ZVA40 var. 48 or
R&S
ZVA67), connect LO IN to
port 4 only
. For these VNA models, or in case
Connecting the RF cables
