Rohde & Schwarz FSQ series, Quick Start Manual

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R&S FSQ Basic Operation
Diagram Layout
4.4 Quick Start Guide 1313.9652.62 - 02
Status displays
The status displays on the left side of the diagram indicate any irregularities (e.g. UNCAL).
UNCAL Indicates that one of the following conditions is present:
• Correction data has been switched off ( CAL menu, CAL CORR OFF ).
– Switch on the correction CAL CORR ON or PRESET .
• No valid correction values are available. This occurs, for example, if a firmware
update is performed followed by a cold start of the instrument.
– Record the correction data (
CAL menu, CAL TOTAL ).
OVLD Indicates an overload of the input mixer.
– Increase the RF attenuation.
IFOVL Indicates an overload of the IF signal path after the input mixer.
– Increase the reference level.
LOUNL Indicates that an error was detected in the instrument's frequency processing
hardware.
EXREF Is displayed if the instrument was set to an external reference but no signal was
detected on the reference input.
OVEN Indicates that the OCXO reference frequency (option R&S FSU-B4) has not yet
reached its operating temperature. The message usually disappears a few minutes
after power-on.
OVTRC Indicates a temporary overload condition of the input mixer or IF signal path while
the trace is measured with Max Hold, Min Hold or Average (Overload Trace). OVLD
and IFOVL override this indication.