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!

Spectrum Averager Frames Request

Controls: Spect Avg Dialog >> Frames Request
Macro: SpavgFrames

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

One frame consists of 1024 data samples. This yields a display of 512 spectral lines.

The Total Frames Counter (beneath the toolbar Averager button) shows the frames accumulated.

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

In Peak mode you may want to set the frames request very high, and then terminate the operation with the Pause key. The maximum value is 2147483647 frames, but it is simplest to just enter 1, which activates Continuous Peak mode. (A single frame wouldn't otherwise be useful.) In this mode the total frames display will continue to increase until it reaches 2147483647, after which it will show 'Cont Peak' instead of a number. Peak operation will continue until you hit Pause.


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

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