What are the specifications of AtSpec?

• Low cost ($95.00 US)
• Unlimited free software support
• The one application runs on Windows 95, Windows 98, Windows 2000 and Windows NT operating systems
• Multiple document interface, Single session - multiple result graphs
• Spectrum resolution selectable from 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 point
• FFT (fast Fourier transform) engine uses 32 bit fixed point arithmetic, 64 bit spectrum average buffers.
• Multi-threaded analysis engine and graphics processing for optimum software performance
• Application of windowing to time domain data: Rectangular, Bartlett, Blackman, Hamming, Hanning and user defined
• Application of weighting functions to power spectrum data: A, B, C and f
• Octave band, 1/3, 1/6 & 1/9 octave band power spectrum display mode
• Calibration files to compensate for data acquisition device magnitude frequency response
• Spectrum, Correlation and Probability density function averaging user selectable from 1 to 32000+ averages
• Supports either stable or auto regressive averaging modes
• Supports true linear correlation estimates (as opposed to circular correlation)
• Auto scaled dB (Decibel), Log or Linear axis display on live graphs
• Graphical comparison of the current spectrum analysis session with previously saved sessions
• Zoom in, zoom out and panning of live graphs
• Data cursor snapped to sample points giving a precise measure of live graph values
• Harmonic data cursor highlighting harmonic relationships
• Placeable data makers showing data values as text labels on live graphs
• Printing and clipboard export of graphs
• User selectable graph colours and fonts
• Saving of spectrum analysis session data
• Snapshot saving of spectrum analysis sessions in progress
• Exporting of graph and analyzer session data to CSV text files
• Automatic rejection of saturated data
• Fully calibratable input devices including the ability to specify input units which will appear on graphs
• Device independent driver layer allows for interfacing to custom hardware support both input and signal generator devices
• Sound Blaster, Impedance, PCM encoded wave file and Text file input device drivers supplied as standard. All input drivers support the delaying of the channel A input
• Signal Generator and Noise Generator output devices supplied as standard. Signal generator supporting sin, triangle and square wave generation with adjustable phase(two channels), frequency and duty cycle. Noise generator supporting white and pink(1/f) pseudo noise sequences with a sequence length of 65536 sample points and adjustable time delay (two channels)
• Support for 4kHz, 8kHz, 48kHz and 96kHz sampling rates of high performance sound cards in the sound blaster drivers
• Open source code of the new DSP engine, drivers and ancillary dynamically loaded module management library
• Support for time domain triggering

 
• Supported Graphs:
• Instantaneous spectrum
• Power spectral density channels A or B or both
• Cross spectral density
• Coherent power
• Coherence
• Transfer function (frequency response)
• Instantaneous time
• Auto correlation channels A or B or both
• cross correlation
• Impulse response
• Step response
• Probability density function channels A or B
• Window function
• Weighting curve

 
• Supported Graph Display Formats:
• Real component
• Imaginary Component
• Phase / Magnitude representation
• Polar / Nyquist representation

AtSpec Pro Graphical User Interface

Paavo Jumppanen
Author of AtSpec Spectrum Analyzer