Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!
The following is from the Daqarta Help system:

Features:

Oscilloscope

Spectrum Analyzer

8-Channel
Signal Generator

(Absolutely FREE!)

Spectrogram

Pitch Tracker

Pitch-to-MIDI

DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Period
    Event
    Spectral Event

    Temperature
    Pressure
    MHz Frequencies

Data Logger

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Automotive

Product test

Contact us about
your application!

Waveform Averager Frames Request

Controls: Wave Avg Dialog >> Frames Request
Macro: WavgFrames

This sets the maximum number of frames to be accumulated in Linear, Histogram, or PSTH modes. In Exponential mode it sets the effective time constant of the running average.

The total frames accumulated at any time are shown in the Total Frames Counter beneath the Averager button.

Hitting Pause at any time will suspend the accumulation of averager frames and freeze the display until unPause. It has no effect on the input or output signals.

In Linear or Exponential modes, noise reduction is proportional to the square root of the number of frames. To cut the noise in half (6 dB reduction) you thus need to quadruple the number of frames; doubling only provides about 30% (3 dB) improvement.


See also Averager, Waveform Averager Controls, Spectrum Averager Controls, Spectrum Averager Frames Request.

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