Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Span continues to increase, "Zoom Center" on page 296 changes to keep the zoom region from
leaving the upper window
Dependencies Only appears if the Zoomed Trace window is visible
Grayed-out in Zero Span. If the SCPI command is sent in Zero Span, an error is reported
Preset On entry to Trace Zoom, Zoom Span is 10% of the span of the upper window. So, if you do Mode
Preset and then immediately switch to Trace Zoom, Zoom Span is 10% of the Span Preset value listed
in the table under Span
State Saved Saved in instrument state
Min 10 Hz
Max Constrained by the top window (instrument) span. It cannot get so large that Zoom Start goes below
the instrument Start Freq, or so that Zoom Stop goes above the instrument Stop Freq. Thus, the limit
is 2*(Zoom Center – Start Freq) or 2*(Stop Freq – Zoom Center), whichever is smaller
Annotation In the Span annotation spot of the lower window
Status Bits/OPC
dependencies
non-overlapped
Zone Center
Lets you change the frequency of the zone without changing the zone span. As Zone
Center is changed, the center frequency of the lower window is changed. Note that
the lower window is not updated to reflect the change unless it is selected as the
active window.
The center frequency for the lower window is not limited by the selected start and
stop frequencies in the upper window. However, if the frequency span of the lower
window is at all outside of the span for the upper window, an orange arrow pointing
left or right is displayed at the left or right edge of the top window.
Remote Command
[:SENSe]:FREQuency:ZSPan:CENTer <frequency>
[:SENSe]:FREQuency:ZSPan:CENTer?
Example
:FREQ:ZSP:CENT 20 MHz
Notes Min and Max values depend on Hardware Options
Dependencies Only appears if the Zone Spectrum window is visible
Couplings Center Frequency of lower window changes so that it is always the same as Zone Center, and vice-
versa
Affected by "Freq Offset" on page 301 exactly the same as is Center Frequency
Preset On entry to Zone Span, the Zone Center frequency is the same as the instrument Center Frequency.
So, if you do Mode Preset and then immediately switch to Zone Span, Zone Center matches the Preset
values listed in the table under Center Frequency
State Saved Saved in instrument state
Min Hardware dependent; Zone Span dependent
298 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)