Keysight E6680A - Streaming Measurement

3 IQ Analyzer (Basic) Mode
3.3 Streaming Measurement
3.3 Streaming Measurement
The Streaming measurement provides wideband streaming capability for the
instrument.
For the convenience of users familiar with the "Complex Spectrum Measurement"
on page 143, the Streaming measurement controls are very similar to those for
Complex Spectrum.
This measurement provides both time and frequency domain traces. It uses digital
signal processing to sample the input signal and convert it to the time and
frequency domain traces. With the instrument tuned to a fixed center frequency,
samples are digitized at a high rate, converted to I and Q components with DSP
hardware, then converted to time domain power and the frequency domain with FFT
software.
This measurement provides a time domain RF Envelope power trace as well as the
frequency domain FFT (Fast Fourier Transform) trace.
Measurement Commands for Streaming
The following measurement commands and queries are used to configure the
measurement:
:INITiate:STReaming
Initiates a trigger cycle for the STReaming
measurement, but does not return any data. You must
then use :FETC:STR[n]? to retrieve data
Does not change any measurement settings
:CONFigure?
Returns the long form name of current measurement,
in this case, STReaming
:CONFigure:STReaming
Selects STReaming measurement with Meas Setup
settings in preset state – same as "Meas Preset" on
page 233
:CONFigure:STReaming:NDEFault
Selects STReaming measurement without affecting
settings
The following queries are used to retrieve the results:
:FETCh:STReaming?
Retrieves the data specified by n
:MEASure:STReaming
[n]?
Switches to STReaming measurement, restores default values,
starts the measurement, then retrieves the data specified by n
:READ:STReaming[n]?
Starts the measurement, then retrieves the data specified by n
The general functionality of "CONFigure" on page 1076, "INITiate" on page 1077,
"FETCh" on page 1077, "MEASure" on page 1079, and "READ" on page 1078 are
IQ Analyzer Mode User's &Programmer's Reference 412