Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.10 TOI Measurement
3.10.6.1 Settings
Contains the basic Frequency functions.
Center Frequency
Sets the frequency that corresponds to the horizontal center of the graticule. While
adjusting Center Frequency, Span is held constant.
The Center Frequency setting is the same for all measurements within a Mode, that
is, it is Meas Global. Some Modes are also able to share a Mode Global center
frequency value. If this is the case, the Mode has a Global tab in its Meas Setup
menu.
The Center Frequency function sets (and queries) the center frequency for the
currently selected input. If your instrument has multiple inputs, and you select
another input, Center Frequency changes to the value for that input. SCPI
commands are available to directly set the value for a specific input.
Center Frequency is remembered as you go from input to input. Thus, you can set a
Center Frequency of 10 GHz with the RF Input selected, change to BBIQ and set a
Center Frequency of 20 MHz, then switch to External Mixing and set a Center
Frequency of 60 GHz. When you return to the RF Input; Center Frequency reverts to
10 GHz; back to BBIQ and it is 20 MHz; back to External Mixing and it is 60 GHz.
See "Center Frequency Presets" on page 1819
Remote Command
[:SENSe]:FREQuency:CENTer <freq>
[:SENSe]:FREQuency:CENTer?
Example Set Center Frequency to 50 MHz:
:FREQ:CENT 50 MHz
Increment Center Frequency by the value of "CF Step" on page 1825
:FREQ:CENT UP
Return the current value of Center Frequency:
:FREQ:CENT?
Notes Sets the RF, External Mixing or I/Q Center Frequency depending on the selected input:
–
For RF input it is equivalent to :FREQ:RF:CENT
–
For I/Q input it is equivalent to :FREQ:IQ:CENT
–
For External Mixer it is equivalent to :FREQ:EMIX:CENT
Preset and Max values depend on Hardware Options
If no terminator (for example, MHz) is sent, the terminator Hz is used. If a terminator with unit other
than frequency is used, an invalid suffix error message is generated
1818 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)