• Time Domain Display and Waveform Editing. Both .TIM and .WAV file formats are accepted. Dual-trace or overlaid display, with interactive controls including zoom, pan, cut-paste editing, rubberband editing, output to D/A for supported board types, store arbitrary trace segments to file, lin/log amplitude (Hypersignal-Acoustic), amplitude scale and units control, time units control, cursor readout and measurements

• 3-D Waterfall Display. Dual-trace or overlaid display with interactive controls including zoom, multiple segment, time-spanned, reverse-time option (Hypersignal-Acoustic), surface control, apparent angle control, lin/log frequency axis

• 2-D Contour Display. Dual-trace or overlaid with interactive controls including zoom, multiple segment, time-spanned, dB range and step, from 8-256 color levels, output to D/A for supported board types, lin/log frequency axis.

• Magnitude and Power Spectra Frame-Based Display. Dual-trace or overlaid display, including zoom, pan (frame and section), dB and linear amplitude formats, dB display vs. amplitude peak, system reference, or calibration reference, lin/log frequency axis.

• Unwrapped, Wrapped and Group-Delay Phase Display. Dual-trace or overlaid display, including zoom, pan (frame and section), radians/degrees cursor readout and measurement.

• Pole-Zero Display. Z-plane and/or S-plane, lowpass, highpass, bandpass, and bandstop bilinear inverse transformation types.

Instrumentation Functions

• Spectrum Analyzer. Dual-trace analyzer with time, lin/log magnitude, power spectra, transfer function, impulse response, and phase display formats. Lin/log frequency axis includes 1/N octave band display in Hypersignal-Acoustic. Real-time filters can be "snapped-in" after design in the software, or from external source. Trace capture to waveform file, calibration, cursor readout, amplitude scale and offset control. Fourier parameters include analysis framesize, FFT size, and window type.

• Digital Oscilloscope. Dual-trace scope with trigger level and mode control, amplitude and timebase control. Real-time filters can be "snapped-in" after design in the software, or from external source. Trace capture to waveform file.

• Signal Generation. Arbitrary waveform generation; control over shape, period, duty cycle, amplitude, etc.

• Stimulus & Response. Both arbitrary stimulus output and MLS stimulus output (Hypersignal-Acoustic only). Control over averaging, hardware parameters; real-time filter options.

• Continuous, Multichannel Record to Disk. Control over number of channels, trigger criteria, amplitude and offset, "snap-in" real-time filters (designed in software or from external source), input gain / voltage range, loopback mode.

• Continuous, Multichannel Output from Disk. Control over number of channels, amplitude and offset, "snap-in" real-time filters, output attenuation or digital scaling.

DSP and Math Functions

• FFT, iFFT (overlap, window selection, zero-fill, max size up to 262,144)

• correlation, circular correlation, convolution, deconvolution

• very long FFT, convolution, correlation (Hypersignal-Macro EX)

• wavelet transform (Hypersignal-Macro EX)

• power spectra estimation (frame average, running average, exponential filter)

• digital filtering (see below)

• LPC analysis

• difference equations (see below)

• sampling rate conversion

• minimum phase calculation (Hypersignal-Macro EX)

• frequency zoom (Hypersignal-Macro EX)

• Schroeder integration (Hypersignal-Acoustic)

• Equalization (Hypersignal-Acoustic)

• MLS stimulus & response (Hypersignal-Acoustic)

• Distortion measurement (Hypersignal-Acoustic)

Difference Equations

• equations are entered in standard textbook notation

• signal arithmetic

• signal generation

• recursive input

• numerous math, trig, and transcendental functions

• complex input and output

Digital Filter Design and Implementation

• FIR and IIR filter types

• classical and arbitrary design methods, including elliptic, Butterworth, Chebyshev I/II, Kaiser-Window, Parks-McClellan, Steiglitz

• specification of cut-off frequencies, stopband attenuation, ripple, filter order

• recursive filtering and convolution functions available to implement and test filters, including "snap-in" real-time filtering in instrument functions (see Instrumentation, above)

• graphical "design-goal" format, with tolerance region display

• graphical editing allowed for arbitrary methods

Programmability

• built-in programming language and compiler

• 32-bit integer and floating-point variables, string variables

• numerous built-in math, string, and waveform file access functions

• for-loop, while-loop, if-then, and goto constructs

• nested procedures and functions

• variables and constants can be used as inputs to all Hypersignal functions, displays, and instruments

• interactive display and instrument commands

• waveform file and ASCII text file access

• record mode, to auto-create programs based on user-action

DSP/Analog Hardware Support