Boonton 4500B Peak Power Meter Manual do Utilizador descarregar pdf (Página 258)

Boonton 4500B RF Peak Power Analyzer

Remote Operation

5-58

5.5.12 READ Queries

The purpose of the READ? group of queries is to initiate a measurement cycle, acquire data, and return specific measurement

data. READ? performs the initiation, data acquisition, postprocessing, and data output portions of the measurement. READ?

is equivalent to ABORting any operation in progress, INITiating a new measurement, then FETChing the data when it is

ready. READ? generally does not return data unless acquisition is complete. Since READ? INITiates a new measurement

every time it is issued, READ? queries should not be used for free running data acquisition (INITiate:CONTinuous ON) - in

this case, use FETCh queries instead. For CW and Modulated modes, the measurement is generally considered complete

when the integration filter (see SENSe:FILTer) is filled. In Pulse mode, the measurement is considered complete when all

the number of complete traces specified by the SENSe:AVERage command have been acquired and averaged together. In

statistical mode, the measurement is considered complete when the number of samples specified by TRIGger:CDF:COUNt

has been gathered.

READ: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,

IEEE bottom amplitude, and overshoot. Units are the same 

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: READ[1|2|3|4|6|7]:ARRay:AMEAsure:POWer?

Returns: CC1, PulsePeak, CC2, PulseCycleAvg, CC3, PulseOnAvg, CC4, IEEE Top, CC5, IEEE Bot,

CC6, Overshoot



Valid Modes: Pulse mode only

Restrictions: Timebase must be set appropriately to allow measurements (see above)

READ: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: READ[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

easurement condition codes for each measurement.

Valid Modes: Statistical mode only

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