Keysight x-series Programmer's Reference

3 VMA Mode
3.2 Custom OFDM Measurement
Couplings Grayed-out when Mixer Mode is Alternate
When the Acquisition mode is changed from Sequential to Simultaneous, this control is reset (manual,
0Hz) for all component carriers
Preset 0 Hz
OFF
State Saved Saved in instrument state
Yes
Range Auto|Manual
Min -(1GHz – BW)/2
Max (1GHz – BW)/2
LO Dither
When ON, the local oscillator frequency is rapidly changed by small, random
amounts. This helps spread the power of spurious signals within the passband,
which lowers their level, thus increasing dynamic range.
This is only required in very wide passbands, so this feature only appears with option
H1G.
Remote Command
[:SENSe]:OFDM:LO:DITHer[:STATe] ON | OFF | 1 | 0
[:SENSe]:OFDM:LO:DITHer[:STATe]?
Example
:OFDM:LO:DITH 1
:OFDM:LO:DITH?
Dependencies Only available when the instrument has Option H1G installed. If you try to turn LO Dither ON in any
other case, an error message is generated, -241,"Hardware missing; Option H1G required"
Appears only in certain Modes (for example, 5GNR, VMA and IQ Analyzer)
Turned Off and grayed-out when the IF Path is set to a path other than 1 GHz. If you press the grayed-
out control, a warning message “LO Dither only available with IF Path 1 GHz” is shown. If you try to set
LO Dither to ON remotely while it is grayed-out, a message “-221,Settings conflict; LO Dither only
available with IF Path 1 GHz" is returned
When LO Dither is ON, "Phase Noise Optimization" on page 539 is grayed-out. If you try to change the
PNO value via the front panel or SCPI in that case, an error is generated, “LO Dither must be turned off
to change this value"
Couplings As with most parameters with an AUTO state, "Auto Couple" on page 1825 sets it to Auto, which then
selects AUTOrange, and setting any specific value (AUTOrange, LOW or HIGH) will set the AUTO state
to false
When LO Dither is ON, Phase Noise Optimization is set to “Best Close-In”. If the Phase Noise
Optimization value changes due to turning on LO Dither, a warning message “Phase Noise
Optimization changed due to LO Dither activation” is shown
See also: "Iterative EVM Optimization Target" on page 493
Vector Modulation Analyzer Mode User's &Programmer's Reference 538

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)