Boonton 4530 Peak Power Meter User Manual - Manual (Page 99)

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Boonton Electronics Chapter 4
4530 Series RF Power Meter Remote Operation
CALCulate:DCYC
Description: Set or return the pulse duty cycle in percent of the input waveform of the selected channel.
This value is used to calculate the theoretical pulse power based on an average power
measurement of a periodic pulse waveform. The pulse power result is valid only for thermal
sensors or for CW diode sensors operating in the square-law (true-RMS) region of their
dynamic range, and subject to the accuracy of the duty cycle value. Setting the duty cycle
to 100% is equivalent to a CW measurement.
Syntax: CALCulate[1|2]:DCYC <n>
Argument: <n> = 0.01 to 100 %
Valid Modes: CW Sensors only
CALCulate:RANGe
Description: Set or return the hardware measurement range for the selected CW channel. When set to
AUTO, the 4530 automatically selects the best range for noise and overload headroom. For
certain applications with large, frequent signal swings, setting the range manually can
improve settling time. Range 0 is used below approximately -10dBm on CW diode sensors
and on all thermal sensors. Range 1 is used above approximately -30dBm on CW diode
sensors. Range 2 is used only on voltage sensors when the input is above about 3.0 volts.
Syntax: CALCulate[1|2]:RANGe <asc>
Argument: <asc> = AUTO, 0, 1, 2
Valid Modes: CW and Voltage sensors only
CALCulate:PKHLD
Description: Set or return the operating mode of the selected channel’s peak hold function. OFF: instan-
taneous peaks are only held for a short time, and then decayed towards the average power
at a rate proportional to the filter time. This is the best setting for most signals, because the
peak will always represent the peak power of the current signal, and the resulting peak-to-
average ratio will be correct shortly after any signal level changes. INST: instantaneous
peaks are held
u ntil reset by a new INITiate command. This setting is used to hold the
highest peak over a long measurement interval. AVG: The held peaks correspond to the
highest and lowest filtered average power, and are held until reset. This is useful for
monitoring average power fluctuations over a period of time. In the case of pulse mode,
note that all average and peak hold measurements are performed on the interval between
the markers. Note that because CW sensors do not measure instantaneous power, they
always operate with the PKHLD mode equivalent to AVG.
Syntax: CALCulate[1|2]:PKHLD <asc>
Argument: <asc> = OFF, AVG, INST
Valid Modes: Modulated and Pulse modes