Keysight Technologies FieldFox A Series, Руководство пользователя

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148 Keysight N9927-90001 User’s Guide
SA (Spectrum Analyzer) Mode
SA Mode Settings
SA Mode Settings
Select SA Mode before making any setting in this chapter.
Because there is no calibration, these settings can be made in any order.
How to select SA Mode
— Press Mode_
— Then SA .
Frequency Range
The X-axis frequency range determines the frequencies that are measured for
each sweep. The default Start frequency is 0 Hz. However, the Start frequency
can be set as low as –100 MHz. The internal LO of the FieldFox can be seen at
0 Hz, which will mask signals that may be present.
Available ONLY with Opt. 209 and while in Step sweep, SA mode allows reverse
sweeps. This means the Start frequency can be higher than the Stop
frequency. In addition, the Reverse Swap feature can be used to quickly
reverse the Start and Stop frequencies. Learn how in “Reverse Swap” on
page 153 .
The frequency range of the measurement can be changed using the following
methods:
— Set Center and Span frequencies
— Set Start and Stop frequencies
— Toggle between Zero and Last selected span
— Set Full Span of the FieldFox
— Using Channel selection. Learn how in
“Channel Selection” on page 151 .
— Using Marker -> Center (frequency). Learn how in “SA Marker Functions”
on page 612 .
How to set Frequency Range
— Press Freq/Dist .
— Then choose from the following:
Although the start frequency can be set as low as -100 MHz, amplitude
accuracy is specified above 100 kHz. Below 100 kHz, frequency accuracy
is maintained, but amplitude accuracy is degraded.
The FieldFox can be used with an OML frequency extender. Refer to
“Utilities” on page 630 , the A Series FieldFox Configuration Guide
5990-9836EN , and to “Contacting Keysight” on page 5 .