Synchronizing the Digitizer

One method of synchronizing the digitizer with other digitizer’s or with other instruments is to determine when the digitizer parser is idle. This is done using the command:

STATus:OPC:INITiate <state >

together with the commands:

*OPC

*OPC?

*WAI

The behavior of *OPC, *OPC?, and *WAI depends on the state set by STATus:OPC:INITiate. When state is ON, sending *OPC, *OPC?, or *WAI following INITiate:IMMediate, VINStrument:CONFigure:VME:MEMory:INITiate, or VINStrument:CONFigure:LBUS:MEMory:INITiate requires the digitizer to complete all measurements or complete the VME or Local bus data transfer before allowing further digitizer operations to continue. ON is the power-on state.

When state is OFF, the execution of *OPC, *OPC?, or *WAI following the above commands indicates the previous commands have executed and that further operations (command execution) can resume without the digitizer in the idle state. Digitizer commands that can be executed during this time are identified in the command reference (Chapter 4) as being "executable when initiated". Refer also to the command reference for detailed information on *OPC, *OPC?, and *WAI.

Saving Digitizer Configurations

To minimize repeated programming, up to 10 digitizer configurations can be saved and later recalled. The configuration saved is restored, with the exception of the STATus subsystem parameters, the CALibration:SECure command state, or any other parameters not affected by *RST.

A configuration is identified by a number from 0 thru 9. The configuration(s) is saved until power is cycled.

174 Understanding the HP E1429 Digitizer

Chapter 3

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HP E1429A manual Saving Digitizer Configurations, Synchronizing the Digitizer, Opc Opc? Wai