Remote Control
R&S
®
CMW500
143User Manual 1173.9463.02 ─ 06
State Valid results? Effect of FETCh...?
OFF No FETCh...? should not be used in the OFF state as valid results are
never available.
RUN Yes/No
R&S CMW500 waits until the current measurement cycle is complete
and returns the results. In continuous repetition mode the
R&S CMW500 continues acquiring results without reaching the RDY
state.
RDY Yes/No Returns the results immediately.
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 and Error Indi-
cators 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.
Control of the Instrument
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