Keysight NFA Series Noise Figure Analyzers Service Guide     89
Instrument Messages
Event Messages
–221 Settings conflict; 
Gate control is Edge 
for Gated FFT
You cannot use level triggering to control the gate if you are using the FFT 
gating method
–221 Settings conflict; 
Gate control must be 
Edge for this Gate 
Source
You cannot use level triggering to control the gate when you are using the 
currently selected gate source
–221 Settings conflict; 
Gate is not available 
when Marker Count on
The gate function cannot be used while you have marker count turned on
–221 Settings conflict; 
Gate Length is not 
settable in FFT 
sweeps
The sweep time for FFT sweeps is set by the calculations, so sweep time 
settings cannot be adjusted
–221 Settings conflict; 
Gate Length is not 
settable in FFT 
sweeps
The sweep time for FFT sweeps is set by the calculations, so sweep time 
settings cannot be adjusted
–221 Settings conflict; 
Gate Method is not 
compatible with 
current Sweep Type 
setting
If the Gate is On and you have the FFT Sweep Type manually selected, then 
the Gate Method cannot be selected
–221 Settings conflict; 
Gate not available 
with external 
Tracking Source
The Gate functions are unavailable when Source Mode is Tracking with an 
external source. This is because the Gate circuitry is used to sync the external 
source
–221 Settings conflict; 
Gate not available 
with Tracking 
Generator
If the Source Type is Tracking Generator, the Gate circuitry is used for TG 
sync and is not available for gating
–221 Settings conflict; 
Gated FFT is not 
available while Sweep 
Type is set to Swept
The gated FFT function is not available if you have selected the swept type of 
sweep. You must be in the FFT sweep type
–221 Settings conflict; 
Gated LO is not 
available while Sweep 
Type is set to FFT
The FFT sweep type moves the LO frequency in steps. So the gated LO 
function is not available if you have selected FFT sweep
–221 Settings conflict; 
Gated Video is not 
available while Sweep 
Type is set to FFT
The gated video function is not available if you have selected the FFT sweep 
type
Err# Message Verbose/Correction Information