Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
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The following is from the Daqarta Help system:



Spectrum Analyzer

Signal Generator

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Pitch Tracker


DaqMusiq Generator
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Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Spectral Event

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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

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Loudspeaker test

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Product test

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Timing Modulation Status Monitor

Beneath the Timing Mod Source control is the Status Monitor. This is a status display only, not a control. It shows the instantaneous modulation being computed at the time the display is updated (about 10 times per second default).

The status monitor shows the effective modulated Quant, Bias, or Shift value, equal to the sum of the base value plus the modulator scaled by the modulator depth.

Note, however, that this is not the same as the actual output modulation at the instant you view it. The samples are computed and sent to a buffer ahead of the time they are needed for output, so this monitor is actually more of a "preview". (You can set the buffer size with the Wave Block control in the Start Preferences dialog.)

This monitor is only useful for very slow modulation rates, where the values don't change too quickly to be read. This is true whether the source is a sine using the Sine Mod Freq control, or a more complex waveform using stream modulation. At fast rates, the monitor is likely to jump around too much to be useful.

Also, if the modulator changes too quickly, the next update may catch it at a point in another cycle that doesn't seem to follow the prior value.

See also Timing Modulation, Random / Step Timing Dialog, Waveform Stream Controls.


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