Keysight E8663D, Руководство пользователя

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92 Keysight E8357D/67D & E8663D PSG User’s Guide
Basic Digital Operation
Arbitrary (ARB) Waveform File Headers
Arbitrary (ARB) Waveform File Headers
An ARB waveform file header enables you to save instrument setup information
(key format settings) along with a waveform. When you retrieve a stored
waveform, the header information is applied so that when the waveform starts
playing, the dual ARB player is set up the same way each time.
Headers can also store a user–specified 32–character description of the
waveform or sequence file.
A default header is automatically created whenever a waveform is generated, a
waveform sequence is created, or a waveform file is downloaded to the PSG
(for details on downloading files, see the Keysight Signal Generators
Programming Guide ).
The following signal generator settings are saved in a file header:
— ARB sample clock rate
— Runtime scaling (only in the dual ARB player)
Marker settings and routing functions ( page 111 )
— Polarity
— ALC hold
— RF blanking
— High crest mode (only in the dual ARB player)
— Modulator attenuation
— Modulator filter
— I/Q output filter (used when routing signals to the rear panel I/Q outputs)
— Other instrument optimization settings (for files generated by the PSG) that
cannot be set by the user.
Creating a File Header for a Modulation Format Waveform
When you turn on a modulation format, the PSG generates a temporary
waveform file (AUTOGEN_WAVEFORM), with a default file header. The default
header has no signal generator settings saved to it.
This procedure, which is the same for all ARB formats, demonstrates how to
create a file header for a Custom digital modulation format.
1. Preset the signal generator.
2. Turn on the Custom modulation format:
Press Mode > Custom > ARB Waveform Generator > Digital Modulation
Off On to On
A default file header is created, and the temporary waveform file
(AUTOGEN_WAVEFORM) plays. Figure 3-1 shows the PSG’s display.