Anritsu Spectrum Master MS2720T, User Manual

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Spectrum Analyzer 2-24 IQ Waveform Capture (Option 24)
Spectrum Analyzer MG PN: 10580-00349 Rev. H 2-37
2-24 IQ Waveform Capture (Option 24)
Option 24, IQ Waveform Capture, captures the raw data for the set center frequency and for
the duration of the set capture length. This section includes instructions for setting up the
instrument, capturing a waveform, and saving it to the instrument, or using the MATLAB
script to read the captured waveform and to save it to a PC.
For remote setup and waveform capture, please refer to the Programming Manual for your
instrument. It includes SCPI commands for instrument remote control, waveform set up and
capture, and two sample scripts: MATLAB and C++. The MATLAB script is used to read a
WCAP file from the instrument and unpack the data into a MATLAB array. The C++ sample
program uses the SCPI commands to initiate a capture and save it directly to the PC.
Waveform Capture Setup
1. Press the
Shift
key and then the
Measure
(
4
) key on the instrument to open the
Measure
menu.
2. Press the
IQ Waveform Capture
submenu key (which is displayed only if Option 24 is
installed on your instrument) to open the IQ Waveform Capture menu.
3. Press the
Capture Length
submenu key to set the length of time that data is taken.
4. Press the
Capture Mode
submenu key and select either
Single
or
Continuous
. Selecting
Single will perform 1 capture when Start Capture is pressed. When Continuous is
selected, multiple waveform captures (that are the time length set in
Capture Length
)
are taken until the
Start Capture
button is pressed to end the waveform capture process.
5. Press the
Sample Rate
submenu key to set the desired capture rate. Bandwidths are
also displayed for each sample rate. Select the desired sample rate in the
Select Capture Sample Rate list box (
Figure 2-22 ) with the arrow keys or rotary knob
and press
Enter
.
6. Press the
Triggering
submenu key to open the Capture Triggering menu. Set the
Source
,
Slope
and
Delay
parameters. Press
Back
to return to the IQ Waveform Capture menu.
7. Press the
File Name & Location
submenu key to open the Save menu. Set up the folder
where the saved captured data will be placed by pressing the
Capture Location
submenu
key. Set up a captured waveform filename using the
File Name (Prefix)
submenu key.
Refer to “IQ Capture Save Menu” on page 2-87 for additional information on
Capture Location and File Name (Prefix).
Figure 2-22. IQ Capture Sample Rate
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