Boonton 4530 Peak Power Meter User Manual - Manual (Page 98)

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Chapter 4 Boonton Electronics
Remote Operation 4530 Series RF Power Meter
4.5.7 CALCulate Subsystem
The CALCulate group of the command subsystem is used to configure post acquisition data processing. Functions in
the CALCulate subsystem are used to configure the measurement mode and control which portions of the acquired
measurement data is used and how it is processed to yield a finished measurement. In addition to measurement mode,
CALCulate is used to define mathematical operations, measurement units, and limit monitoring. The numeric suffix of
the CALCulate program mnemonic in the CALCulate commands refers to a processing and display “channel”, that is
CALCulate1 and CALCulate2 represent the power meter’s Channel 1 and Channel 2 functions. The CALCulate
commands generally DO NOT affect the data acquisition portion of the measurement (see the SENSe subsystem,
above). In a signal-flow block diagram, the CALCulate block operations will follow those of the SENSe block. Note that
CALCulate2 commands will generate an error if used with a single channel Model 4531.
CALCulate:STATe
Description: Set or return the measurement state of the selected channel. When ON, the channel per-
forms measurements; when OFF, the channel is disabled and no measurements are per-
formed.
Syntax: CALCulate[1|2]:STATe <asc>
Argument: <asc> = ON, OFF
Valid Modes: Any
CALCulate:MODe
Description: Set or return the measurement mode of the selected channel. CW and MODULATED are
continuous measurement modes, PULSE is a triggered, oscilloscope-like mode, and CDF,
CCDF and DIST are various presentation formats of statistical mode, which gathers and
analyzes a large number of samples over a relatively long time interval.
Syntax: CALCulate[1|2]:MODe <asc>
Argument: <asc> = CW, MODULATED, PULSE, CDF, CCDF, DIST
Valid Modes: Sensor dependent. CW and voltage sensors may select CW mode only. If CW mode is
selected for a peak sensor, it will be forced to MODULATED mode.
CALCulate:MATH
Description: Set or return the signal source or sources combined in an arithmetic operation for the
displayed reading on the selected channel. Ratiometric displays may be made between two
sensors, or between a sensor and a stored reference (see
CALCulate:REFerence com-
mands), and sum or difference operations may be performed between two sensors, depend-
ing on sensor type. For power sensors, the power ratio of two sources in dB relative (dBr)
or percent power, or the sum of power of two sources in dBm or linear units is available.
Voltage sensors allow voltage ratios in dBr or percent power, and voltage difference in log
or linear voltage units.
Syntax: CALCulate[1|2]:MATH <asc>
Argument: <asc> = CH{1|2}, REF{1|2}, REF_RAT, REF_SUM, REF_DIFF, CH_RAT, CH_SUM, CH_DIFF
Valid Modes: CW and Modulated modes
Restrictions: For calculations between sensors, both sensors must be of the same type (power or voltage
sensors).