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98 Chapter 4

O:\Manuals\E6380A_Progguid\Book\Ieee.fm

IEEE Common Commands

Common Command Descriptions

*WAI (Wait To Complete)

The *WAI command stops the Test Set from executing any further

commands or queries until all commands or queries preceding the *WAI

command have completed.

Example BASIC statement

Example 4-9 Example

OUTPUT 714;"DISP RFG;RFG:OUTP ’Dupl’;*WAI;AMPL 0 dBm"

NOTE

The Test Set contains signal generation and signal measurement

instrumentation. The instrument control processor is able to query the

signal measurement instrumentation to determine if a measurement

cycle has completed. However, the instrument control processor is not

able to query the signal generation instrumentation to determine if the

signal(s) have settled. In order to ensure that all signals have settled to

proper values, the instrument control processor initiates a one-second

delay upon receipt of the *OPC, *OPC? and *WAI commands. In

parallel with the one-second timer the instrument control processor

commands all active measurements to tell it when the measurement(s)

are done. When all active measurements are done and the one-second

timer has elapsed, the *OPC, *OPC? and *WAI commands are satisfied.

If the *OPC, *OPC? or *WAI common commands are used to determine

when a measurement has completed and the measurement is either in

the OFF State or unavailable (four dashed lines on CRT display “- - - -”),

the *OPC, *OPC? or *WAI command will never complete.

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Agilent Technologies 8935 Series Bedienungsanleitung Seite 98