Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.10 Spurious Emissions Measurement
Return the current value of Center Frequency:
:FREQ:CENT?
Notes This command 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
Dependencies Not available in the MSR, LTE-Advanced FDD/TDD and 5G NR Modes
Preset Depends on instrument maximum frequency, Mode, measurement, and selected input
See "Center Frequency Presets" on page 1436, "RF Center Freq" on page 1438, "Ext Mix Center Freq"
on page 1439, "I/Q Center Freq" on page 1440 and "VXT Models with Radio Heads/CIU Frequency
Range" on page 1438
State Saved Saved in instrument state
Min/Max Depends on instrument maximum frequency, Mode, measurement, and selected input
See "Center Frequency Presets" on page 1436, "RF Center Freq" on page 1438, "I/Q Center Freq" on
page 1440 and "VXT Models with Radio Heads/CIU Frequency Range" on page 1438
Annotation Center <value> appears in the lower left corner of the display
Status Bits/OPC
dependencies
Non-overlapped
Center Frequency Presets
The following table provides the Center Frequency Presets for the Spectrum
Analyzer mode, and the Max Freq, for the various frequency options:
Freq Option CF after Mode
Preset
Stop Freq after Mode
Preset
Max Freq
(can't tune
above)
503 (all but CXA) 1.805 GHz 3.6 GHz 3.7 GHz
503 (CXA) 1.505 GHz 3.0 GHz 3.08 GHz
507 (all but CXA) 3.505 GHz 7.0GHz 7.1 GHz
507 (CXA) 3.755 GHz 7.5GHz 7.58 GHz
508 (all but MXE) 1.805 GHz 3.6GHz 8.5 GHz
508 (MXE) 4.205 GHz 8.4GHz 8.5 GHz
513 6.805 GHz 13.6GHz 13.8 GHz
526 (except CXA and
MXE)
13.255 GHz 26.5 GHz 27.0 GHz*
526 (CXA) 13.255 GHz 26.5GHz 26.55 GHz
1436 Short Range Comms & IoT 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)