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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
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.
Setting the VME Bus
Transfer Mode
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