G3 Vector Signal Generator Memory Segmentation
应用文章
This application note gives an overview of the definitions for IQ samples, segments, and sequences. It then describes the different options for storing and replaying multiple sets of IQ modulation data from the memory.
The memory segmentation in G3 Vector Signal Generator devices allows the user to freely switch between stored waveforms. To that end, multiple sets of IQ modulation data are stored separately in the memory of the device. Each set of IQ data can then be replayed and employed to modulate the carrier frequency to result in the desired RF output. The user is presented with several playback options to select which set of stored IQ modulation data is replayed.
This application note first gives a brief introduction into the nomenclature of samples, segments, and sequences, and then describes the different options for storing and replaying the IQ data in the memory. As for storing options, the user can choose between G3 Vector Signal Generator graphical user interface (GUI) and SCPI commands.
Selecting the replayed IQ data can be done with the same means as storing. Additionally, if the device supports the fast control port (FCP) interface option, the FCP can be configured to control the selected data for real-time switching of the replayed segments, which can be important for time critical applications.