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!

Pulse Wave Dialog

Controls: Gen Dlg >> Stream >> Wave >> Pulse
Macro: Wave=Pulse

The button brings up a separate dialog to allow creation of monophasic or biphasic pulses with adjustable levels. The first pulse is called A and the second B. The B pulse always starts immediately after the A pulse ends.

The default pulse is biphasic, with the A pulse positive and the B pulse negative.

When both A and B pulses are done, the remainder of each cycle is at the 0 Level. The cycle time is determined by the main wave frequency.

You can set Pulse B Width and Level to 0 to get monophasic (unipolar) pulses. If Pulse A Level is +100%, the pulses will jump from 0 Level to +100%. By setting 0 level to -100%, the effective pulse amplitude will be 200%. This may be useful when driving external circuits such as the Wide Range DC Pulse Converter, or the super-simple 2 Channel USB Plug-Type Sound Card modification discussed under Simple Sound Card Unipolar DC Modification... small, and less than US $2.

You can specify the pulse widths in proportional units (Percent or Degrees), in which case they will change as the main wave frequency changes. If you specify fixed units (Samples or Seconds) then the frequency doesn't affect the pulse widths, it only affects the baseline time at 0 Level between repetitions.

Macro Notes:

Wave=Pulse or Wave=4 sets the waveform of the current channel and stream to Pulse. Use prefixes like L.1.Wave=Pulse to specify channel and stream, here Left Stream 1. Note that this command format sets Wave but does not open the Pulse dialog. This is the usual approach for modifying Generator setups.

Alternatively, you can use Channel Select variable Ch to specify the channel and stream via Ch.Wave=Pulse, where Ch has previously been set to 0-3 (for L.0. to L.3.) or 4-7 (for R.0. to R.3).

To set Wave to Pulse and also open the Pulse dialog (if the Wave dialog is already open), use a D. prefix as in D.L.1.Wave=Pulse.


See also Wave Dialog.

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