Preparing the Analyzer for Use
R&S
®
ZVA80
7
Quick Start Guide 1312.6808.62 ─ 02
tional Local Oscillator (LO) signal from PORT 3 / 4 of the analyzer is used for down-
conversion of the reference and measurement channels. 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 analyzer automatically switches between low frequency and high frequency mode,
depending on the stimulus frequency; see
chapter 2.3.2, "H/L SWITCH Connector"
on page 10. There is no need to change the test setup and cabling.
2.2 R&S ZVA80 Base Unit Connectors
The front and rear panel controls and connectors of the R&S ZVA80 BU are described
in the R&S ZVA Quick Start Guide, stock number 1145.1090.62 and in the network ana-
lyzer's help system. The following sections describe special aspects for measurements
with external test sets.
2.2.1 PORT 1 and PORT 2 Connectors
The PORT 1 and PORT 2 connector groups are similar. Each of them consists of a bidir-
ectional, ruggedized 2.4 mm connector and 3 pairs of 1.85 mm (V) connectors for direct
generator and receiver access.
The connectors are used alternatively:
●
The 2.4 mm connector serves as a test port connector for one or two-port measure-
ments with
internal
test set. In this operating mode, the three 1.85 mm connector
pairs are generally not needed, however, they can provide an extended measurement
functionality (see R&S ZVA Quick Start Guide, stock number 1145.1090.62, and the
network analyzer's help system). Unused OUT/IN loops must be closed by means of
jumpers as shown in the figure above.
●
The SOURCE OUT connector provides the RF source signal for the
external
test
set. SOURCE OUT is connected to the rear panel of the diplexer. In the low frequency
range below approx. 50 GHz, REF IN and MEAS IN receive the reference waves and
measured waves from the diplexer, respectively. The 1 mm connector of the diplexer
serves as a test port connector; the 2.4 mm connectors at PORT 1 / 2 are not needed.
chapter 2.1, "Operation with External Test Sets"
R&S ZVA80 Base Unit Connectors
