Preparing the Analyzer for Use
R&S
®
ZVA80
11
Quick Start Guide 1312.6808.62 ─ 02
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 "ZVA80-BU" mode ensures compatible source powers.
Before you connect your external test set to the network analyzer, always activate the
"ZVA80-BU" mode using the "Frequency Converter" dialog (see
the ZVA80-BU Measurement Mode"
Maximum input voltage at BIAS and EMI suppression
The maximum nominal input voltage and current for the BIAS connector must not exceed
the value quoted in the data sheet. Use a double-shielded cable and terminate open cable
ends with 50
Ω
to ensure successful control of electromagnetic radiation during operation.
The LED labeled ON lights when the diplexer is properly power-supplied. If the LED does
not light, check the following:
●
The power connection between the diplexer and the converter must be in place (see
●
The converter must be power-supplied and switched on.
●
The fuse at the converter must be intact.
2.3.4 Fuse Holder
A fuse of type IEC 127-F250L at the front protects the diplexer from excess input current
at the BIAS connector. The frequency converter is protected by a fuse of different type;
see
chapter 2.4.3.3, "Fuse Holder"
For fuse replacement refer to
chapter 2.5.9, "Replacing Fuses"
2.4 Frequency Converter Connectors
The R&S ZVA80 is delivered with two fully assembled external test sets, as described in
chapter 2.3, "Diplexer Connectors"
, on page 8. The open connectors of the converter are
described in the following sections.
2.4.1 Waveguide Flange
For normal operation, the waveguide adapter with the precision waveguide flange moun-
ted on top is connected to the diplexer. If the frequency converter is used separately, a
DUT can be connected to the waveguide flange. Refer to the Quick Start Guide for fre-
Frequency Converter Connectors
