Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.2 Modulation Analysis Measurement
Phase Error
Available only for all modulation formats but 2-FSK.
This trace shows the phase error trace in time domain. This trace is computed by
comparing the unwrapped phase, point by points, of the IQ measured signal with the
unwrapped phase of the IQ reference signal.
Example
:DISP:EVM:WIND:DATA PERR
sets the first window data to Phase Error
FSK Error Time
Available only when the demodulation format is 2-FSK.
This trace shows the time domain error vector trace data results. The trace contains
the computed error vectors between FSK Meas Time and FSK Ref Time at each point
in time. The values of the error vectors are usually plotted as a magnitude.
Example
:DISP:EVM:WIND2:DATA EVT
sets the second window data to FSK Error Time
FSK Error Spectrum
Available only when the demodulation format is 2-FSK.
This trace is the frequency spectrum of the FSK Vector Time trace data. The
demodulator produces the spectrum by windowing and FFT the FSK Error Time
data. On this trace, the individual error vectors are plotted vs frequency.
Example
:DISP:EVM:WIND2:DATA EVSP
sets the second window data to FSK Error Spectrum
Carrier Mag Error
Available only when the demodulation format is 2-FSK.
This trace shows the carrier magnitude error trace in time domain. This trace is
computed by comparing the magnitude, point by points, of the FSK measured signal
with the averaged magnitude.
Example
:DISP:EVM:WIND:DATA MERR
sets the first window data to Carrier Mag Error
196 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)