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!

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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