Keysight x-series Programmer's Reference

3 VMA Mode
3.1 Digital Demod Measurement
3.1 Digital Demod Measurement
This measurement provides flexible modulation analysis capabilities in the N9054C
Vector Modulation Analyzer (VMA) Mode. The measurement is based on the
acquisition of IQ Pairs from the instrument. It includes flexible demodulation of a
wide variety of standard and custom single-carrier modulation formats. You can
simultaneously view pre-demod time and spectrum displays, demodulated signal,
reconstructed reference signal, recovered symbols and various error traces and
summaries.
Measurement Commands
The following measurement commands and queries are used to configure the
measurement:
:INITiate:DDEMod
Initiates a trigger cycle for the DDEMod measurement, but
does not return any data. You must then use
:FETC:DDEM[n]? to retrieve data
Does not change any measurement settings
:CONFigure?
Returns the long form name of current measurement, in
this case, DDEMod
:CONFigure:DDEMod
Selects DDEMod measurement with Meas Setup settings
in preset state – same as "Meas Preset" on page 306
:CONFigure:DDEMod:NDEFault
Selects DDEMod measurement without affecting settings
The following queries are used to retrieve the results:
:FETCh:DDEMod?
Retrieves the data specified by n
:MEASure:DDEMod
[n]?
Switches to DDEMod measurement, restores default values, starts the
measurement, then retrieves the data specified by n
:READ:DDEMod[n]?
Starts the measurement, then retrieves the data specified by n
The general functionality of "CONFigure" on page 2551, "INITiate" on page 2552,
"FETCh" on page 2552, "MEASure" on page 2554, and "READ" on page 2553 are
described in the section SCPI Operation and Results Query in the topic
Programming the Instrument.
Remote Command Results
For the FETCh, MEASure, and READ queries listed above, the results returned
depend on the value of n. In many cases, the results returned also depend on the
selected "Modulation Format" on page 335
183 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)