Boonton 4500B Peak Power Meter Manual de usuario descargar pdf (Pagina 234)

Boonton 4500B RF Peak Power Analyzer

Remote Operation

5-34

FETCh:ARRay:AMEAsure:TIMe?

Description: Returns an array of the current automatic timing measurements performed on a periodic pulse

waveform. Measurements performed are: the frequency, period, width, offtime and duty cycle of

the pulse waveform, and the risetime and falltime of the edge transitions. For each of the

measurements to be performed, the appropriate items to be measured must be visible on the

display in GRAPH mode. Pulse frequency, period, offtime and duty cycle measurements require

that an entire cycle of the pulse waveform (minimum of three edge transitions) be present. Pulse

width measurement requires that at least one full pulse is visible, and is most accurate if the pulse

width is at least 0.4 divisions (20 pixels). Risetime and falltime measurements require that the

edge being measured is visible, and will be most accurate if the transition takes at least 0.1

divisions (5 pixels). It is always best to have the power analyzer set on the fastest timebase

possible that meets the edge visibility restrictions. Set the trace averaging as high as practical to

reduce fluctuations and noise in the pulse timing measurements. Note that the timing of the edge

transitions is defined by the settings of the SENSe:PULSe:DISTal, :MESIal and :PROXimal



Syntax: FETCh[1|2|3|4|6|7]:ARRay:AMEAsure:TIMe?

Returns: CC1, PulseFreq, CC2, PulsePeriod, CC3, PulseWidth, CC4, Offtime, CC5, DutyCycle, CC6,

Risetime, CC7, Falltime, CC8, EdgeDly, CC9, Skew in Hz, percent or seconds

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

Valid Modes: Pulse mode only

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

FETCh:ARRay:CW:POWer?

Description: Returns the current average, maximum, minimum powers or voltages and the peak-to-average

-to-average

ratio is returned in dB for logarithmic channel units, and percent for all other channel units.

Note that the values for maximum and minimum power will depend on the peak hold mode; see

the description of the CALCulate:PKHLD command for details.

Syntax: FETCh[1|2|3|4|6|7]:ARRay:CW:POWer?

Returns: CC1, Pavg, CC2, Pmax, CC3, Pmin, CC4, PkToAvgRatio

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

Valid Modes: Modulated and Statistical.

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Boonton 4500B Peak Power Meter Manual de usuario Pagina 234