Boonton 4530 Peak Power Meter User Manual - Manual (Page 85)

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Boonton Electronics Chapter 4
4530 Series RF Power Meter Remote Operation
READ:ARRay:CW:VOLTage
Description: Performs a single measurement and returns the average, maximum, minimum voltage and
peak-to-average ratio in dB (peak sensor) or pulse voltage (CW sensor) for the specified
channel. Note that the values for maximum and minimum voltage will depend on the peak
hold mode; see the description of the
CALCulate:PKHLD command for details. If a CW
sensor is used, min and max powers returned are always the highest and lowest filtered
average readings that have occurred since the start of the measurement, and the pulse
voltage returned is computed from the measured average power and the preset duty cycle
(see
CALCulate:DCYC command). Note the peak-to-average ratio is returned in dB for log
units, and percent for linear units.
Syntax: READ[1|2]:ARRay:CW:VOLTage?
Returns: Vavg, Vmax, Vmin, PkToAvgRatio (Modulated mode) or Vpulse (CW mode)
Valid Modes: CW and Modulated modes
READ:ARRay:PULse:POWer
Description: Performs a single measurement and returns an array of marker measurements for the speci-
fied channel. The array consists of the average, maximum, and minimum power and peak-to-
average ratio between
the two markers, powers at each of the markers, and the ratio of the
two marker powers. Note the peak-to-average ratio and marker ratio are returned in dB for
log units, and percent for linear units.
Syntax: READ[1
|
2]:ARRay:PULSe:POWer?
Returns: Pavg, Pmax, Pmin, PkToAvgRatio, Pwr@Marker1, Pwr@Marker2, Mrk1/Mrk2 ratio
Valid Modes: Pulse mode only
READ:ARRay:AMEAsure:TIMe
Description: Performs a single measurement and returns an array of 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 screen if the power meter is place 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 measure-
ments require that at least one full pulse is visible, and are most accurate if the pulse width
is at least 15% of the screen width (timespan). Risetime and falltime require that the edge
being measured is visible, and will be most accurate if the transition takes at least 5% of the
screen width. It is always best to have the power meter set on the fastest timespan 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 settings; see the descriptions for those commands.
Syntax: READ[1|2]:ARRay:AMEAsure:TIMe?
Returns: PulseFreq, PulsePeriod, PulseWidth, Offtime, DutyCycle, Risetime, Falltime in fundamental
units
Valid Modes: Pulse mode only
Restrictions: Timespan must be set appropriately to allow measurements (see above)