Boonton 4540 Peak Power Meter User Manual - Manual (Page 147)

Boonton 4540 Series RF Power Meter
Remote Operation 5-13
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 commands), and sum or
difference operations may be performed between two sensors, depending 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 <character data>
Argument: <character data> = { CH1, CH2, REF1, REF2, REF_RAT, REF_SUM, REF_DIFF, CH_RAT,
CH_SUM, CH_DIFF }.
Valid Modes: Modulated/CW mode only
Restrictions: For calculations between sensors, both sensors must be of the same type (power or voltage
sensors).
CALCulate:MODE
Description: Set or return the system measurement mode. MODULATED mode is a continuous measurement
mode primarily for continuously modulated or CW signals, PULSE mode is a signal triggered,
oscilloscope-like mode that acquires and analyzes the a pulsed signal as a series of one or more
triggered sweeps, and STATISTICAL mode performs long-term power distribution analysis on
modulates signal, and may be operated in a start-stop continuous mode, or a decimated continuous
mode.
Note that the measurement mode is global, and affects both channels. If either channel has a CW
sensor installed, peak or statistical measurements will be unavailable, but the ―primary‖ average
power measurement will still be performed.
. Syntax: CALCulate:MODE <character data>
Argument: <character data> = {MODulated, PULSe, STATistical}
Valid Modes: Any
CALCulate:PKHLD
Description: Set or return the operating mode of the selected channel’s peak hold function. When set to OFF,
instantaneous 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. When set to ON, instantaneous peaks are held
until reset by a new INITiate command or cleared manually. This setting is used when it is
desirable to hold the highest peak over a long measurement interval without any decay.
Syntax: CALCulate[1|2]:PKHLD <Boolean>
Argument: <Boolean> = { 0, 1, OFF, AVG, INST }
Valid Modes: Modulated and Pulse Modes