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

Signal Generator
(Absolutely FREE!)

Spectrogram

True RMS Voltmeter

Sound Level Meter

Frequency Counter

Period Counter

Event Counter

Spectral Event Counter

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Vehicle pass-by noise

Product test

Contact us about
your application!

Volts

This control is only active in Meter mode. In use, you start by setting the Left Step control to the 0 (loudest) step, then measuring the Left output voltage with a meter and entering the value here.

You next set Left Step to the next lower step (-1) and again measure the voltage and enter here.

Do this for all steps to calibrate the Wave or Master attenuator.

Note that is is extremely common to read the same voltage on adjacent steps. These are dummy steps inserted by the card maker (or Windows) to give the appearance of finer resolution on the sliders of the standard Windows mixer. For that reason, you should perform the calibration in Init Table mode. That way, when you set a Volts value it will be automatically entered to all softer steps, on the assumption that they are dummy steps that don't differ. As you work down from loud to soft, you will only need to enter Volts on the functional steps.


See also Meter / Match Mode Control, Calibrate Wave / Master, Generator Attenuator Options Dialog.

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