What are waveform files

To determine whether combining signals is supported for your tests, see the Test Case Manager Software topic. The software places the waveform file on the PC hard-drive regardless of the Offline Mode setting.

Offline Mode determines whether the waveform is downloaded to the instrument:. The CW Interferer does not generate its own waveform file. It either downloads just instrument settings or becomes a part of one of the above named waveform files. There is also a unique name that the software creates for the LTE test case 8. There is no way to name or rename a waveform file using the software user interface. These names are used for both the file on the PC hard drive and the file downloaded to an instrument.

The only way to change the waveform file name is to access the file and manually change the file name. The file header contains key parameters of the waveform segment, including DAC sample rate, marker polarity, runtime scaling, and so forth.

Figure 4. Waveform header information on Keysight MXG signal generator. VSGs provide waveform markers to mark specific points on a waveform segment. You can turn on markers at specific sample points manually, or download a marker file with the waveform file together to the baseband generator.

When the signal generator encounters an enabled marker, an auxiliary signal is routed to a real panel event output that corresponds to the marker number. The Keysight X-series signal generator provides four markers set at each waveform sample. A marker point consumes one byte. Using an oscilloscope to examine the Q channel and marker 1 signal, the waveforms appear at the bottom of Figure 5. Figure 5. Shows the I and Q components of the waveform and the marker points.

You need to set the marker polarity positive or negative , and routing for each marker You can also configure markers to enable or disable internal hardware, such as automatic leveling control ALC hold, and RF blanking. When you create the waveform data, the I and Q data samples typically reside in separate arrays or files.

You can also use a single file with I and Q data samples interleaved; the Q data follows the I data. A waveform sequence is a file that contains pointers to one or more waveform segments, other waveform sequences nested sequences , or both. This enables you to play multiple waveform segments or sequences. The signal generator allows you to set the number of times the segments and sequences repeat during playback.

Figure 6 shows the structure of waveform segments and sequences. The dual arbitrary waveform player is a flexible way to generate complex baseband waveforms. However, you need to understand the hardware structure and the requirements for waveform data to generate your desired waveforms. Choon-Hin Chang Awesome PC Accessories. Best Linux Laptops. Best Wireless iPhone Earbuds. Best Bluetooth Trackers. Best eReaders. Best VPN. Browse All News Articles. Windows 11 Uninstall Clock.

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