IQ Player (Optional)
IQ Player (Optional)
The optional IQ Player is used to play dual arbitrary waveforms, such as IQ baseband signals.
A dual arbitrary waveform is analogous to a stereo music file. It has two channels of information that contain the same
number of samples, always start and end together, and always play at the same sample rate.
File Formats
The instrument's native .ARB and .BARB files can contain either one or two channels of data. These files are typically
created in Agilent BenchLink Waveform Builder software, and you can directly play them on the instrument.
You can also directly play files ending in .DAT, .ASC, .I, and .Q. These file formats contain one or two columns of ASCII
numbers ranging between -1.0 and 1.0, in either scientific or decimal notation. The data represents the relative
“shape” of the waveform at the current amplitude range.
Finally, you can import one- or two-column data files in .CSV or .TXT format. To import a file, press Waveforms, then
Arb, then Arbs and Import Data on the front panel. This opens a menu interface that quickly guides you through the
process of importing a file.
Front Panel
Once you have a dual arbitrary waveform as the active waveform, the tab changes to a purple color, as shown below.
The waveform image is a constellation diagram, but you can change it to a time domain diagram. To do this, press Sys-
tem, then System Setup, then Screen Layout. This takes you to the following menu:
Pressing the Time softkey changes the graphic to a time domain image:
Agilent 33500 Series Operating and Service Guide 111
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