154 Chapter 2
Instrument Functions: A - L
Input/Output
Instrument Functions: A - L
2.8.4.1 Spectrum Analyzer
Switches the IF path to the spectrum analyzer path that is used for normal operation.
Key Path: Input/Output, 321.4 MHz IF Out Opt
History: Added in revision A.06.00.
Remote Command:
See “321.4 MHz IF Out Opt” on page 153.
2.8.4.2 Dnconverter WBIF
Configures the IF path for improved frequency response at the 321.4 MHz IF Out
connector on the rear of the instrument. While this 321.4 MHz IF path is selected, the
signal is routed away from the normal spectrum analyzer signal path. This disables
measurements, so no signal is displayed on the display.
Key Path:
Input/Output, 321.4 MHz IF Out Opt
History: Added in revision A.06.00.
Remote Command:
See “321.4 MHz IF Out Opt” on page 153.
2.8.5 Microwave Preselector
For Option 123 only. This switches the 321.4 MHz IF path between the normal 3 to 26.5
GHz preselected mixer and an optional unpreselected high band mixer. The preselected
path is the normal path for the analyser.
WARNING The first mixer can be overloaded if a large out-of-span signal is
present at the input. When the preselector is bypassed this signal
passes through to the mixer causing an overload. The instrument
cannot detect this condition, so no overload error message is
displayed.
Key Path:
Input/Output
Dependencies/
Couplings: The functionality is not available
• if the start frequency is in band zero (<2.85 GHz).
• when using a Mode other then Spectrum Analysis, such as Phase Noise
and Noise Figure.
If the preselector state is off, then the instrument start frequency is
limited to frequencies
≥3.05 GHz.
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