Measurement Control CMU
1100.4903.12 5.30 E-8
mands) can not be applied together with the INITiate command. The
operation complete bit (bit no. 0 in the event status register, ESR) is set
immediately after the command sequence INIT; *OPC, i.e. as soon as
the measurement is started and not after the end of the first evaluation
period.
The command CONFigure:<meas_obj>:EREPorting <Event>,
<Mode> represents a more flexible tool for generating a service request or
setting the operation complete bit after the end of a measurement (see
section Event Reporting on page 5.31).
READ command Instead of INITiate, the READ command can be used to initiate a (single
shot) measurement, see section Retrieving Measurement Results on page
5.35.
ABORt:<meas_obj>
Aborts the current measurement immediately and switches over to the OFF
state. All measurement values are set invalid (INV); the hardware re-
sources are released for other measurements.
As illustrated in Fig. 5-7, ABORt can be called in any measurement state.
Sequential execution ABORt is implemented as a sequential command. This means that ABORt
ist not complete until the measurement has released all resouces and has
changed to the OFF state.
STOP:<meas_obj>
Stops (halts) the measurement as quickly as possible; i.e. after the end of
the current evaluation period (or statistics cycle, if cycles comprising sev-
eral evaluation periods are defined). The measurement changes to the
STOP state such that all corresponding measurement values are kept un-
changed. The hardware resources are retained.
As illustrated in Fig. 5-7, STOP can be called in the measurement states
RUN and STEP. If called in the OFF state the command causes an SCPI
error –221, Settings conflict.
Sequential execution STOP is implemented as a sequential command. Execution of STOP is
considered as complete as soon as the measurement state STOP is
reached.
The STOP command causes no events which are set by the event report-
ing system (see section Event Reporting on page 5.31). This means that a
service request must be explicitly requested by an *OPC command.
CONTinue:<meas_obj>
Resumes the measurement for the next measurement evaluation period
and changes to the RUN state.
As illustrated in Fig. 5-7, CONTinue can be called in the measurement
states STOP and STEP. If the previous measurement has been terminated
(the measurement status returned by the FETCh:<meas_obj>:STATus?
is RDY), CONTinue restarts the measurement and resets the counters for
the evaluation period and statistics (the latter is not used for RF measure-
ments) to zero.
In the other measurement states the command causes an SCPI error
–221, Settings conflict.
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