Rohde & Schwarz CMW500 Series, Руководство пользователя

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Remote Control
R&S
®
CMW500
147 User Manual 1173.9463.02 ─ 02
FETCh:<FWA>:<Context>:TRACe:<View>:<Statistics>...?
READ:<FWA>:<Context>:TRACe:<View>:<Statistics>...?
e.g.
FETCh:GSM:MEASurement:MEValuation:EVMagnitude?
FETCh:GSM:MEASurement:MEValuation:TRACe:EVMagnitude:CURRent?
The
<View>
mnemonic is used in multi evaluation measurements where it distinguishes
different subsets of results. For detailed information about the returned values refer to
the command reference description. See also
Multi Evaluation Measurements .
6.4.2.5 Reliability Indicator
The reliability indicator is an information element that describes the validity of the results
and the possible source of inaccuracies or errors. The R&S CMW500 provides common
reliability indicators for an entire array of measurement results (retrieved with a single
command).
Common Reliability Indicator
The common reliability indicator is the first value in the output arrays of the
FETCh...?,
READ...?
and
CALCulate...?
queries.
Example:
FETCh:GPRF:MEAS:EPSensor:CURRent?
Response: 0, 10.22, 10.15, 10.01, 10.29, 100 (reliability = 0, followed by 5 numeric mea-
surement values).
The common reliability indicator is one of the following values:
●
0 (OK) :
Measurement values available, no error detected.
●
1 (Measurement Timeout) :
Measurement results may be available, however, at least a part of the measurement
provides only INValid results or has not completed the full statistic count. The mea-
surement has been stopped after the configurable measurement timeout.
●
3 (Overdriven) / 4 (Underdriven) :
Measurement results available, however, the accuracy of some results may be
impaired because the input signal level was too high / too low.
●
6 (Trigger Timeout) :
The measurement could not be started or continued because no trigger event was
detected.
●
7 (Acquisition Error) :
The R&S CMW500 could not properly decode the RF input signal.
●
8 (Sync Error) :
The R&S CMW500 could not synchronize to the RF input signal.
●
15 (Reference Frequency Error) :
The instrument has been configured to use an external reference signal but the ref-
erence oscillator could not be phase locked to the external signal (e.g. signal level
too low, frequency out of range or reference signal not available at all).
●
16 (RF Not Available) :
Control of the Instrument