Boonton 4500B Peak Power Meter Manual de usuario Pagina 233

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Boonton 4500B RF Peak Power Analyzer
Remote Operation
5-33
5.5.5 FETCh Queries
The FETCh? group of queries is used to return specific measurement data from a measurement cycle that has been INITiated
and is complete or free-running. FETCh? performs the data output portion of the measurement. FETCh? does not start a
new measurement, so a series of FETCh? queries may be used to return more than one set of processed measurements from a
complete set of acquired data. FETCh? usually returns the current value of measurements, and should be used anytime free
running data acquisition is taking place (INITiate:CONTinuous ON). If FETCh? is used for single measurements
(INITiate:CONTinuous OFF), no data will be returned until a measurement has been INITiated and is complete.
FETCh:ARRay:AMEAsure:POWer?
Description: Returns an array of the current automatic amplitude measurements performed on a periodic pulse
waveform. Measurements performed are: peak amplitude during the pulse, average amplitude
over a full cycle of the pulse waveform, average amplitude during the pulse, IEEE top amplitude,

overshoot is returned in dB for logarithmic channel units, and percent for all other units. Also, the
   used for peak and average calculations is defined by the
SENSe:PULSe:STARTGT and :ENDGT time gating settings. A full pulse (rise and fall) must
be visible on the display to make average and peak pulse power measurements, and a full cycle of
the waveform must be visible to calculate average cycle amplitude.
Syntax: FETCh[1|2|3|4|6|7]:ARRay:AMEAsure:POWer?
Returns: CC1, PulsePeak, CC2, PulseCycleAvg, CC3, PulseOnAvg, CC4, IEEE Top, CC5, IEEE Bot, CC6,
Overshoot.
rement.
Valid Modes: Pulse mode only.
Restrictions: Timebase must be set appropriately to allow measurements (see above)
FETCh:ARRay:AMEAsure:STATistical?
Description: Returns an array of the current automatic statistical measurements performed on a sample
population. Measurements performed are: long term average, peak and minimum amplitude,
peak-to-average ratio, amplitude at each marker, statistical percent at each marker, and the sample
population size in megasamples. Note the peak-to-average ratio is returned in dB for logarithmic
channel units, and percent for all other channel units.
Syntax: FETCh[1|2|3|4|6|7]:ARRay:AMEAsure:STATistical?
Returns: CC1, Pavg, CC2, Ppeak, CC3, Pmin, CC4, PkToAvgRatio, CC5, Pwr@Mrk1, CC6, Pwr@Mrk2,
CC7, Pct@Refline1, CC8, Pct@Refline2, CC9, Sample-Count

Valid Modes: Statistical mode only
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