Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.2 Modulation Analysis Measurement
3.2 Modulation Analysis Measurement
The Modulation Analysis measurement provides the capability of demodulating the
modulated signal and displaying the demodulated signal in both the time and
frequency domain. It also provides the metrics results such as error vector
magnitude, frequency error, clock error, IQ offset, magnitude error and phase error.
Modulation Analysis Measurement Commands
The following commands are used to retrieve the measurement results:
:CONFigure:EVM
:CONFigure:EVM:NDEFault
Selects the Modulation Analysis measurement in Meas Preset state
The following commands select the Modulation Analysis measurement without
affecting settings
:INITiate:EVM
:FETCh:EVM[n]?
:READ:EVM[n]?
:MEASure:EVM[n]?
Remote Command Results for Modulation Analysis Measurement
Condition n Return Value
0 Returns unprocessed I/Q captured trace data, as a series of
trace point values. The I values are listed first in each pair, using
the 0 through even-indexed values. The Q values are the odd-
indexed values
Modulation
Format = Offset
QPSK
not specified
or n=1
Returns the following 22 comma-separated scalar results:
#. Result Name (average mode) <explanations>
where average mode is one of:
Average : Averaged value in average cycle
Peak Hold : Detected Peak/Maximum value in average cycle
1.
Transmit Power (Average) is a floating point number (in
dBm) of transmit power
2.
RMS EVM (Average) is a floating point number (in percent)
of EVM over the entire measurement area
3.
Peak EVM (Peak Hold) is a floating point number (in percent)
of the peak EVM in the measurement area
Short Range Comms & IoT Mode User's &Programmer's Reference 181

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)