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System tour
R&S
®
ZNA67EXT
29
Getting Started 1179.6295.02 ─ 02
The picture above shows the connector panel of the "right" diplexer variant
(Var 18). For the "left" variant (Var 12), the horizontal order of the connec-
tors is exactly opposite.
●
The Sense and Force triaxial BNC female connectors and the 4
mm GND
socket implement the bias tee. Bias is applied via the Force input, which is
protected by an exchangeable fuse (see
on page 30).
The Sense output is connected to the bias tee via a 1
kΩ resistor, which
allows measuring the bias voltage close to the DUT without the uncertainty
caused by a voltage drop on a long bias line.
●
RF In Low / High is a 1.85
mm female connector, which receives the RF
source signal from the R&S
ZNA67EXT network analyzer unit. This connector
is used in low frequency and in high frequency mode.
●
Ref Out Low is a 1.85
mm female connector, which provides the reference
signal (a-wave) in low frequency mode.
●
Meas Out Low is a 1.85
mm female connector, which provides the measured
signal (b-wave) in low frequency mode.
RF In, Ref Out, and Meas Out are connected to the corresponding direct access
connectors of the related VNA port. The complete RF and IF connection of the
external test set is described in
Chapter 8, "Connecting the external test sets"
Maximum input power at RF IN
The RF input power at the RF IN connector must not exceed the maximum
value quoted in the data sheet. The maximum value is below the maximum
RF source power of the network analyzer. The "ZNA67EXT-TS" converter
type ensures compatible source powers.
Before you connect your external test set to the network analyzer, always
select the "ZNA67EXT-TS" converter type for the related port using the
"Converter Configuration" dialog (see
Chapter 9.2, "Converter configura-
Diplexers