Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.11 IQ Waveform Measurement
3.11 IQ Waveform Measurement
The IQ Waveform measurement is a time-domain measurement that lets you view
the envelope, real and imaginary components of an RF or baseband signal. It is
similar in many respects to the zero-span measurement in traditional spectrum
analysis but gives you direct access to the I/Q pairs of the signal, such as those that
make up modern communications signals. The IQ Waveform measurement can also
be used to perform general purpose power measurements to a high degree of
accuracy.
You can examine the RF envelope (magnitude) of the signal, or open an I/Q
Waveform window, which shows the I and Q signal waveform voltage versus time, to
disclose the voltages that comprise the complex modulated waveform of a digital
signal.
Measurement Commands
The general functionality of "CONFigure" on page 2431, "INITiate" on page 2432,
"FETCh" on page 2432, "MEASure" on page 2434, and "READ" on page 2433 are
described in the section SCPI Operation and Results Query in the topic
Programming the Instrument.
The following measurement commands and queries are used to configure the
measurement:
:INITiate:WAVeform
Initiates a trigger cycle for the WAV measurement, but
does not return any data. You must then use
:FETC:WAV[n]? to retrieve data
Does not change any measurement settings
:CONFigure?
Returns the long form name of current measurement, in
this case, WAVeform
:CONFigure:WAVeform
Selects WAV measurement with Meas Setup settings in
preset state – same as "Meas Preset" on page 1602
:CONFigure:WAVeform:NDEFault
Selects WAV measurement without affecting settings
The following queries are used to retrieve the results:
:FETCh:WAVeform?
Retrieves the data defined by n
:MEASure:WAVeform
[n]?
Switches to WAV measurement, restores default values, starts the
measurement, then retrieves the data defined by n
:READ:WAVeform[n]?
Starts the measurement, then retrieves the data defined by n
Short Range Comms & IoT Mode User's &Programmer's Reference 1509

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)