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Status and Events

Synchronizat

ion Methods

Overview

Although most commands are completed almost immediately after being received

by the oscilloscope, some commands start a process that requires time. For

example, onc

e a single sequence acquisition command is executed, depending

upon the applied signals and trigger settings, it may take an indeterminate amount

of time b efore the acquisition is complete. Rather than remain idle while the

operation is in process, the oscilloscope will continue processing other commands.

This means that some operations will no t be completed in the order that they

were sent.

Sometimes the result of an operation depends on the result of a n earlier operation.

A ﬁrst operation must complete before the next one is processed. The oscilloscope

status and event reporting system is designed to accommodate this process.

The Operation Complete (OPC) bit of the Standard Event Status Register (SESR)

can be programmed to indicate when certain oscilloscope operations have

completed and, by setting the E vent Status Enable Register (ES

ER) to report

OPC in the Event Status Bit (ESB) of the Status Byte Register (SBR) and setting

the Service Request Enable Register (SRER) to generate service request upon a

positive transition of the ESB, a service request (SRQ) interrupt can be generated

when certain operations comple te as described in this section.

The following oscilloscope operations can generate an OPC:

:ACQuire:STATE<non-zeronr1>|ON|RUNonlywheninsinglesequence

acquisition mode

:CALibrate:FACtory STARt

:CALibrate:FACtory CONTinue

:CALibrate:FACtory PREVious

:HARDCopy

:HARDCopy START

:DIAg:STATE EXECute

:SAVe:IMAGe <ﬁle as quoted string>

:SAVe:SETUp <ﬁle as quoted string>

:RECAll:SETUp <ﬁle as quoted string>

:SAVe:WAVEform <source wwfm>,(<REF1-REF4> | <ﬁle as quoted string>

:RECAll:WAVEform <ISF ﬁle as quoted string>,<REF1-REF4>

:CH<1-4>:PRObe:DEGAUss EXECute

:CH<1-4>:PRObe:AUTOZero EXECute

TEKSecure

MSO2000B, DPO2000B, MSO2000 and DPO2000 Series Oscilloscopes Programmer Manual 3-7

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