Key features
R&S
®
ZNA67EXT
14
Getting Started 1179.6295.02 ─ 02
IN, RF IN, REF OUT, and MEAS OUT on the connector panel of the converter
are not used.
●
To achieve frequencies above approx. 67
GHz (i.e. to measure in "high fre-
quency" mode), the frequency converter in the external test set is used. The
source signal of the respective analyzer port is fed to the frequency converter,
and the converted signal is routed to the 1
mm test port connector of the
diplexer. The frequency converter uses frequency multipliers to transform the
source signal into a high-frequency stimulus signal. A local oscillator (LO) sig-
nal from the Converter LO output of the analyzer (R&S
ZNA-B8) is used for
down-conversion of the reference and measurement channels. If more than
one converter is used, a power divider feeds the LO signal to the converters.
This test setup ensures a stable phase relationship between the LO IN signals
of the converters.
The analyzer measures the a-waves from REF OUT and the b-waves from
MEAS OUT on the converters. The RF connectors REF OUT, MEAS OUT on
the rear panel of the diplexers are not used.
The network analyzer automatically switches between low frequency and high fre-
quency mode, depending on the stimulus frequency; see
on page 28. There is no need to change the test setup and cabling.