User manual

Operator's Manual

List of Standard Math Functions

NOTE: Additional math functions may be available depending on the options installed on the oscilloscope.

Function Definition

Absolute For every point in the waveform the distance away from zero is calculated. For values greater than

zero this is the same as the value. For values less than zero, the magnitude of this value without

regard to its sign is used.

Average Calculates either a summed or continuous average of a selected number of sweeps. See

Averaging Waveforms. The maximum number of sweeps is determined by the oscilloscope model

and memory. See the specifications at teledynelecroy.com.

Derivative Calculates the derivative of adjacent samples using the formula:

(next sample value – current sample value) / (horizontal sample interval)

DIfference For every point in the waveform, the value of Source2 is subtracted from the value of Source1.

Source1 and Source2 must have the same horizontal units and scale and the same vertical units.

Envelope Calculates highest and lowest vertical values of a waveform at each horizontal value for a specified

number of sweeps.

FFT Computes a frequency spectrum with optional Rectangular, Von Hann, Flat Topp, Hamming,

Blackman-Harris, and Hanning windows. Calculates up to 1 Mpts. Also allows FFT Averaging

through use of a second math operator. See FFT.

Floor Calculates the lowest vertical values of a waveform at each horizontal value for a specified number

of sweeps.

Integral Calculates the linearly rescaled integral (with multiplier and adder) of a waveform input starting

from the left edge of the screen using the formula:

(current sample value + next sample value) * (horizontal sample interval)

Each calculated area is summed with the previous sum of areas. The multiplier and adder are

applied before the integration function.

Invert For every point in the waveform, the inverse of that point is calculated.

Product For every point in the waveform, the value of Source1 is multiplied by the value of Source 2.

Source1 and Source2 must have the same horizontal units and scale.

Ratio For every point in the waveform, the value of Source1 is divided by the value of Source2. Source1

and Source2 must have the same horizontal units and scale.

Reciprocal For every point in the waveform the inverse is calculated using the formula: 1 / (sample value)

Rescale For every point in the waveform the sample value is multiplied by the specified multiplier and then

add to with the specified adder. See Rescaling and Assigning Units.

Roof Calculates the highest vertical values of a waveform at each horizontal value for a specified

number of sweeps.

Sinx/x Performs10 -to-1 interpolation using a Sin(x)/x filter.

Square For every point in the waveform, the square of the sample value is calculated.

Square Root For every point in the waveform, the square root of the sample value is calculated.

Sum For every point in the waveform, the value of Source1 is added to the value of Source 2.Source1

and Source2 must have the same horizontal units and scale and the same vertical units.