Keysight x-series Programmer's Reference

3 VMA Mode
3.4 IQ Waveform Measurement
–
"Center Frequency Presets" on page 740
–
"VXT Models with Radio Heads/CIU Frequency Range" on page 742
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:
: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
Preset Depends on instrument maximum frequency, mode, measurement, and selected input
See "Center Frequency Presets" on page 740, "RF Center Freq (Remote Command Only)" on page
742, "Ext Mix Center Freq (Remote Command Only)" on page 742, "I/Q Center Freq (Remote
Command Only)" on page 743 and "VXT Models with Radio Heads/CIU Frequency Range" on page 742
State Saved Saved in instrument state
Min/Max Depends on instrument minimum/maximum frequency, mode, measurement, and selected input
See "Center Frequency Presets" on page 740, "RF Center Freq (Remote Command Only)" on page
742, "Ext Mix Center Freq (Remote Command Only)" on page 742, "I/Q Center Freq (Remote
Command Only)" on page 743 and "VXT Models with Radio Heads/CIU Frequency Range" on page 742
Status Bits/OPC
dependencies
Non-overlapped
Auto Function (MSR, LTE-Advanced FDD/TDD and 5G NR Modes Only)
Remote Command
[:SENSe]:FREQuency:CENTer:AUTO ON | OFF | 1 | 0
[:SENSe]:FREQuency:CENTer:AUTO?
Example
:FREQ:CENT:AUTO OFF
:FREQ:CENT:AUTO?
Dependencies Only available for Monitor Spectrum, Power Stat CCDF and IQ waveform measurements in the MSR,
LTE-Advanced FDD/TDD and 5G NR Modes
Couplings When Center Frequency is changed, state is automatically changed to Manual
739 Vector Modulation 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)