Keysight NFA Series Noise Figure Analyzers Service Guide     93
Instrument Messages
Event Messages
–221 Settings conflict; 
Scale Type = Lin is 
not available when 
Normalize is on
Only the Log amplitude scale is available in Normalize, since the results are 
always presented as a dB ratio
–221 Settings conflict; 
Settings conflict; 
Pre-trigger is 
insufficient for 
demod. Decrease Trig 
Delay.
–221 Settings conflict; 
Signal Track is not 
available with 
Continuous Peak
The signal tracking feature cannot be used while you are also using the 
continuous peak function
–221 Settings conflict; 
Signal Track is only 
available in Swept SA 
measurement
The signal track functionality can be used when making a swept SA 
measurement. It is not available in the SA measurement when you are using 
FFT sweeps
–221 Settings conflict; 
Signal Track is 
turned off when Zero 
Span is selected
Signal Track is not available when you have selected Zero Span. So if Zero 
Span is entered while in Signal Track is On, Signal Track is turned off
–221 Settings Conflict; 
Span limited to XXX
–221 Settings conflict; 
Span Zoom is not 
available in Zero 
Span
Span Zoom does not work with a time domain X-axis. You must select a span 
greater then 0 Hz
–221 Settings conflict; 
Step keys are not 
available to modify 
this function
You should select a specific value for this function. Using the 
Up/Down 
step keys to scroll through values is not allowed
–221 Settings conflict; 
Sweep Setup only 
available in swept 
measurements
The current measurement uses FFT mode, so does not use the Sweep Setup 
menu
–221 Settings conflict; 
Sweep Time cannot be 
auto-coupled in FFT 
sweeps
The sweep time for FFT sweeps is set by the calculations. So sweep time 
settings cannot be adjusted
–221 Settings conflict; 
Sweep Time cannot be 
auto-coupled while in 
Zero Span
You cannot send the remote command to set the sweep time to auto while 
you are in zero span
Err# Message Verbose/Correction Information