The VINStrument Subsystem

The commands within the VINStrument subsystem used for VME data transfers are shown below:

VINStrument [:CONFigure]

:VME

:FEED <source > :MEMory

:INITiate [:MODE] <mode > :SEND

:ADDRess

:DATA?

VME Bus Transfer

Programming

Sequence

Setting the VME Bus Transfer Mode

To configure the digitizer for VME bus data transfers:

∙Use the CONFigure command and the low-level digitizer commands to specify the number of readings, the expected value of the readings, the input port, the arm source, etc.

∙Use the TRIGger:STARt:SOURce command to set the trigger source to VME (for real time data transfers only).

∙Use the VINStrument subsystem to set the VME bus transfer mode and data source.

∙Use the INITiate:IMMediate command to initiate reading transfers. The VME bus data transfer mode is set with the command:

VINStrument[:CONFigure]:VME[:MODE] <mode >

The <mode > parameters are:

GENerate - VME bus data transfers are enabled

OFF - VME bus data transfers are disabled. At power-on or following a reset, the <mode > is OFF.

Note When transferring data over the VME bus, the Local bus transfer mode (HP E1429B) must be disabled. This is done with the command:

VINStrument[:CONFigure]:LBUS[:MODE] OFF

Chapter 3

Understanding the HP E1429 Digitizer 151

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HP E1429A manual VINStrument Subsystem, Vme, Data?