Remote Control
R&S
®
CMW500
145User Manual 1173.9463.02 ─ 02
Repeated FETCh...? commands
It is possible to use repeated FETCh...? commands without re-starting the measure-
ment, e.g. in order to monitor the variation in time of a measured quantity in continuous
measurement mode.
●
In single-shot mode where the measurement reaches the RDY state and is stopped
before the first FETCh...? is executed, the results of repeated FETCh...? com-
mands will be identical.
●
In continuous mode, the first FETCh...? is executed after the end of the current
measurement cycle. The following FETCh...? commands are executed as quickly
as possible, no matter whether the R&S CMW500 has acquired new results.
READ...? Command
Aborts the current measurement (if a measurement is running), starts a new measure-
ment in single-shot mode, and returns the results including the Reliability Indicator at the
end of the measurement cycle.
READ...? does not change any of the measurement control settings. The measurement
initiated by READ...? is stopped after one single-shot (--> measurement state RDY),
however, the repetition mode itself is not changed.
READ...? can be used in all measurement states.
Performance considerations, multi evaluation measurements
The READ...? query is view-specific and calculates only the results needed for a par-
ticular view. This can result in a performance improvement compared to the context-
specific command sequence INITiate...; FETCh...?
In contrast to FETCh...? queries, READ...? commands also provide valid results for
disabled views in multi evaluation measurements; see Retrieving results for disabled
views.
CALCulate...? Command
Waits until the end of the current measurement cycle (if the measurement is running) and
returns the limit check results including the Reliability Indicator.
CALCulate...? analyzes the results that would be returned by the corresponding
FETCh...? Command and returns the single-value error indicators, see Error Indicators
Control of the Instrument
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