Rohde & Schwarz FSW Series, User Manual

Page: 156 / 371

I/Q Data Import and Export
R&S
®
FSW-K7
156 User Manual 1173.9240.02 ─ 17
7 I/Q Data Import and Export
Baseband signals mostly occur as so-called complex baseband signals, i.e. a signal
representation that consists of two channels; the in phase (I) and the quadrature (Q)
channel. Such signals are referred to as I/Q signals. I/Q signals are useful because the
specific RF or IF frequencies are not needed. The complete modulation information
and even distortion that originates from the RF, IF or baseband domains can be ana-
lyzed in the I/Q baseband.
Importing and exporting I/Q signals is useful for various applications:
●
Generating and saving I/Q signals in an RF or baseband signal generator or in
external software tools to analyze them with the R&S
FSW later
●
Capturing and saving I/Q signals with an RF or baseband signal analyzer to ana-
lyze them with the R&S
FSW or an external software tool later
For example, you can capture I/Q data using the I/Q Analyzer application, if available,
and then perform a Analog Demodulation measurement on that data later using the
R&S
FSW Analog Demodulation application.
As opposed to storing trace data, which may be averaged or restricted to peak values,
I/Q data is stored as it was captured, without further processing. The data is stored as
complex values in 32-bit floating-point format. Multi-channel data is not supported. The
I/Q data is stored in a format with the file extension
.iq.tar
.
For a detailed description see the R&S FSW I/Q Analyzer and I/Q Input User Manual.
Export only in MSRA mode
In MSRA mode, I/Q data can only be exported to other applications; I/Q data cannot be
imported to the MSRA Master or any MSRA applications.
● Import/Export Functions ........................................................................................156
● How to Export and Import I/Q Data .......................................................................158
7.1 Import/Export Functions
The following import and export functions are available via softkeys in the "Save/
Recall" menu which is displayed when you select the "Save" or "Open" icon in the tool-
bar.
For a description of the other functions in the "Save/Recall" menu see the R&S FSW
User Manual.
Import .......................................................................................................................... 157
└
I/Q Import ...................................................................................................... 157
Export ..........................................................................................................................157
Import/Export Functions