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:



Spectrum Analyzer

Signal Generator

(Absolutely FREE!)


Pitch Tracker


DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Spectral Event

    MHz Frequencies

Data Logger

Waveform Averager


Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls


Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording



Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery


Product test

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Init Table

This button has completely different effects depending upon whether Meter or Match mode is active. Make sure you understand the basic approach as discussed in the Meter / Match mode control topic.

In Meter mode, Init Table means that any value you enter in the Volts control is copied to all softer volume steps, and their dB / Step values are set to 0 dB (no change from the prior step). This means that when working from loudest to softest on a typical sound card having many dummy "no change" steps, you simply scroll Left Step down until the meter shows a change, then enter the new Volts value. You don't need to enter anything for all the dummy steps, since they have been automatically set to the last-entered value.

In Match mode, Init Table simply fills the calibration table with the same step size for all steps. Use the 'dB / Step' control to specify that step size. The value you enter will be the starting point for adjustments on each step. The default is 0 dB, since most sound cards have many dummy "no change" steps. Then in Edit mode you will adjust the value of each functional step to get a match.

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


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