Keysight x-series Programmer's Reference

3 VMA Mode
3.1 Digital Demod Measurement
ASK Meas Time is the measured time data results for the input signal. There are 6
available formats for this trace data: I-Q, Constellation, Real, Imaginary, I-Eye and
Q-Eye. Normally this trace data is displayed with I-Q format.
Format name Description
I-Q Real part of data is shown on horizontal axis, imaginary part is shown on vertical axis, Independent
variable (X axis) is normal to display
Constellation Same as I-Q, but for data with symbols defined, only the symbol points are shown as dots with no
connecting lines
Real (I) Real part of data is shown on a linear Y axis
Imaginary (Q) Imaginary part of data is shown on linear Y axis
I-Eye Real part of data is shown with X axis segmented (generally into 2 symbol segments) and each segment
is overlaid to show signal crossings at symbol boundaries
Q-Eye Same as I-eye but imaginary part of data is shown
Example
:DISP:DDEM:WIND:DATA MTIM
Sets the first window data to ASK Meas Time
:DISP:DDEM:WIND:FORM CONS
Selects Constellation as the first window data format
ASK Ref Time
Available only when the demodulation format is any ASK type.
ASK Ref Time is the reconstructed ideal time waveform to compare ASK Meas Time
against. There are 6 available formats for this trace data: I-Q, Constellation, Real,
Imaginary, I-Eye and Q-Eye. Normally this trace data is displayed with I-Q format.
Format name Description
I-Q Real part of data is shown on horizontal axis, imaginary part is shown on vertical axis, Independent
variable (X axis) is normal to display
Constellation Same as I-Q, but for data with symbols defined, only the symbol points are shown as dots with no
connecting lines
Real (I) Real part of data is shown on a linear Y axis
Imaginary (Q) Imaginary part of data is shown on linear Y axis
I-Eye Real part of data is shown with X axis segmented (generally into 2 symbol segments) and each segment
is overlaid to show signal crossings at symbol boundaries
Q-Eye Same as I-eye but imaginary part of data is shown
Example
:DISP:DDEM:WIND:DATA RTIM
Sets the first window data to ASK Ref Time
:DISP:DDEM:WIND:FORM CONS
Selects Constellation as the first window data format
219 Vector Modulation Analyzer 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)