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R&S
ZVA-Z90E / -Z110E
3.9 Troubleshooting
The table below lists possible errors and remedies.
Error
No output signal, LED next to the
mains switch on the rear of the
converter panel off.
Power control fails, frequency
converter operates at maximum
output power.
Inaccurate converter source lev-
els
Inaccurate converter source lev-
els, even at reduced speed
3.10 Additional Information
For a comprehensive description of the frequency converter mode including remote
control refer to the R&S ZVA/ZVT online help system or to the printable operating man-
ual, which is available for download at http://www.rohde-schwarz.com/product/zva.
Application notes related to the frequency converter are also available for download,
see http://www.rohde-schwarz.com/product/zva-z.
The text book "Fundamentals of Vector Network Analysis" by Michael Hiebel is an ideal
complement for the information given in the user documentation. The book combines
theoretical background and practical measurements on an R&S ZVA network analyzer.
In case of interest please contact your local R&S office.
Getting Started 1307.7197.62 ─ 08
Possible cause
Converter not power-supplied
Control connection not estab-
lished
Insufficient settling time, espe-
cially for fast sweep and strong
power variations
Power coefficients entered and
converters do not match, e.g. the
coefficients of port 1 and port 2
are interchanged
Basic Operation
Additional Information
Remedy
Check power supply and fuse
(see
Chapter 2.3.3, "Fuse
Holder",
on page 9)
Check connecting cable and port
assignment of control connectors.
Increase sweep time ("Channel >
Sweep > Sweep Time")
Make sure that all coefficients are
correct and assigned to the right
analyzer ports (see
Chapter 3.4,
"Entering Power
Coefficients",
on page 21)
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