260 Keysight Signal Generators Programming Guide
Creating and Downloading Waveform Files
Downloading E443xB Signal Generator Files
E443xB Data Format
The following diagram describes the data format for the E443xB waveform files. This file structure
can be compared with the new style file format shown in “Waveform Structure” on page 223. If you
create new waveform files for the signal generator, use the format shown in “Waveform Data
Requirements” on page 215.
Storage Locations for E443xB ARB files
Place waveforms in either volatile memory or non–volatile memory. The signal generator supports the
E443xB directory structure for waveform file downloads (i.e. “ARBI:”, “ARBQ:”, “NVARBI:”, and
“NVARBQ:”, see also “SCPI Commands” on page 262).
Volatile Memory Storage Locations
•/user/arbi/
•/user/arbq/
Non–Volatile Memory Storage Locations
•/user/nvarbi/
•/user/nvarbq/
Loading files into the above directories (volatile or non–volatile memory) does not actually store them
in those directories. Instead, these directories function as “pipes” to the format translator. The signal
generator performs the following functions on the E443xB data:
• Converts the 14–bit I and Q data into 16–bit data (the format required by the signal generator).
Subtract 8192, left shifts the data, and appends two bits (zeros) before the least significant bit
(i.e. the offset binary values are converted to 2’s complement values by the signal generator).
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