Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.2 Modulation Analysis Measurement
FSK Ref Spectrum is the frequency spectrum of the FSK Ref Time trace data. The
demodulator produces the spectrum by windowing and FFT the FSK reference data.
If the reference filter is selected, the spectrum represents the signal after filtering.
Example
:DISP:EVM:WIND:DATA RSPE
sets the first window data to FSK Ref Spectrum
Demod Error
Displays the general demodulation error results.
Error Vector Time
Available only for all modulation formats but 2-FSK.
This trace shows the time domain error vector trace data results. The trace contains
the computed error vectors between IQ Meas Time and IQ 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 Error Vector Time
Error Vector Spectrum
Available only for all modulation formats but 2-FSK.
Error Vector Spectrum is the frequency spectrum of the Error Vector Time trace
data. The demodulator produces the spectrum by windowing and FFT the Error
Vector 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 Error Vector Spectrum
Mag Error
Available only for all modulation formats but 2-FSK.
This trace shows the magnitude error trace in time domain. This trace is computed
by comparing the magnitude, point by points, of the IQ measured signal with the
magnitude of the IQ reference signal.
Example
:DISP:EVM:WIND:DATA MERR
sets the first window data to Mag Error
Short Range Comms & IoT Mode User's &Programmer's Reference 195

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)