Rohde & Schwarz CMW500 Series, User Manual

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Remote Control
R&S
®
CMW500
144 User Manual 1173.9463.02 ─ 02
Simplified statistics
Some measurement contexts provide simplified statistical settings. Refer to the mea-
surement and remote control description for details.
6.4.2.4 Retrieving Measurement Results
The results of a measurement can be retrieved by means of
FETCh...?
or
READ...?
queries. Limit check results are retrieved by
CALCulate...?
queries. All command
types have the same structure:
FETCh:<FWA>:<Context>:<View>:<Statistics>...?
READ:<FWA>:<Context>:<View>:<Statistics>...?
CALCulate:<FWA>:<Context>:<View>:<Statistics>...?
e.g.
FETCh:GPRF:MEASurement<i>:POWer:CURRent?
The three identifiers
<FWA>, <Context>, <View>
and
<Statistics>
denote the
Firmware Applications , Measurement Contexts and Views , and the Statistics Type ,
respectively.
<View>
is only required for measurement contexts providing several views.
The number and type of measurement results depends on the measurement context and
view; refer to the relevant reference documentation.
FETCh...? Command
Waits until the end of the current measurement cycle (if the measurement is running) and
returns the results including the
Reliability Indicator .
FETCh...?
is similar to the
READ...? Command , however, it does not start a new measurement. The measurement
must have been started (
INITiate...
; see Measurement Control ) before a
FETCh...?
command can be executed.
Measurement states
A
FETCh...?
command can be used in the RUN state as described above or in the RDY
state, provided that the R&S CMW500 has stored valid results. If no valid results are
available, NCAP, NAV or INV are returned for each unavailable valid result, see also
Return Values NCAP, NAV and INV .
The following table gives an overview of the behavior depending on the measurement
state.
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.
Control of the Instrument