Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Remote Command
[:SENSe]:FREQuency:TZOom:CENTer <frequency>
[:SENSe]:FREQuency:TZOom:CENTer?
Example
:FREQ:TZO:CENT 20 MHz
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
Couplings The center frequency for the lower window is limited by the start and stop frequencies in the upper
window. You cannot move the zoom region out of the upper window, nor does changing the Zoom
Center frequency ever change the Zoom Span. When Zoom Center increases or decreases to a value
that causes the zoom region to touch an edge of the top window, the Zoom Center is clipped at that
value. If the instrument Start and/or Stop frequencies change such that the Zoom Region is no longer
between them, the Zoom Region is moved to the far left or right of the top window as appropriate
Affected by "Freq Offset" on page 301, exactly the same as is Center Frequency
Preset On entry to Trace Zoom, the Zoom Center frequency is the same as the instrument Center Frequency.
So, if you do Mode Preset and then immediately go into Trace Zoom, Zoom Center matches the Preset
values listed in the table under the Center Frequency control description
State Saved Saved in instrument state
Min Start Frequency of top window
Max Same as the maximum instrument Center Frequency, which is basically the instrument maximum
frequency –5 Hz. See the table under Center Frequency
Annotation In the Center Freq position of the Zoom Window
Zoom Span
Allows the span of the zoom region to be changed without changing the zoom
center.
The center frequency for the lower window is limited by the start and stop
frequencies in the upper window. You cannot move the zoom region out of the
upper window. Consequently, if the zoom region hits either the left or right edge of
the upper window, Zoom Span starts to shrink to keep the zoom region from going
outside the upper window.
The Zoom Span value is displayed in the lower right corner of the zoom window
(below the graticule) when the frequency entry mode is Center/Span (pressing
"Center Frequency" on page 281 or "Span" on page 287 sets the frequency entry
mode to Center/Span). When the frequency entry mode is Start/Stop, Zoom Start is
displayed in this lower left annotation position (pressing "Start Freq" on page 292 or
"Stop Freq" on page 294 sets the frequency entry mode to Start/Stop).
Remote Command
[:SENSe]:FREQuency:TZOom:SPAN <frequency>
[:SENSe]:FREQuency:TZOom:SPAN?
Example
:FREQ:TZO:SPAN 20 MHz
Notes As Zoom Span increases, if the edge of the zoom region hits either edge of the graticule, then as Zoom
Spectrum Analyzer Mode User's &Programmer's Reference 297

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)