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!

Ramp Modulation Type (Phase, Slope)

Controls: Gen Dlg >> Stream >> Wave >> Ramp >> Modulation
Macro: RampMod

When a Ramp wave is active, you can change the normal Phase Modulation to allow Slope modulation instead. This pair of radio buttons selects the way the modulation will operate if it is used; it doesn't activate the modulation directly.

With Phase Modulation the waveform simply slides back and forth, whereas Slope Modulation effectively modulates the Rise value. If you set Rise to 50% you get a triangle wave, and with Slope Modulation this tilts to the right and left. At 100% modulation, the wave smoothly changes between an effective Rise of 0% and 100%. This effect is easier to see at lower frequencies, where there are only a few cycles on the trace.


Macro Notes:

L.1.RampMod=Phase sets Left Stream 1 Ramp Modulation Type to Phase, L.1.RampMod=Slope sets it to Slope. Alternatively, you can use numeric values, variables, or expressions equal to 0 and 1 in place of 'Phase' and 'Slope', respectively.

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


See also Ramp Wave, Wave Dialog

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