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!

Zero (Screen and Data)


Macros: Zero, ZeroDlg

The Zero options apply "DC offset" values to waveforms, shifting the waveform up or down on the trace. There are two basic kinds of Zero operation:

Screen Zero affects only the display; it does not change the cursor readouts, the Y axis, the Trigger operation, nor the data saved to a file. Use it when you want to examine a portion of the waveform at high display magnification (PgUp) to view fine details, without driving the region of interest off the screen.

Data Zero affects the raw data (and hence the readouts, Y axis, Trigger, and file data), and is typically used to correct for drift or to calibrate the zero position in DC-coupled measurement and/or output systems.

The toolbar button (or ALT+Z) toggles the waveform Screen Zero function on and off, but the actual position is set via the Screen Zero controls in the Zero dialog, which also includes the Data Zero controls. Click the thin button below Zero, or hit CTRL+Z to display the Zero dialog:

  • Screen Zero toggle (duplicate of toolbar button)
  • Screen Zero controls

While the state of the toolbar button shows whether the Screen Zero is active, the button text shows if any Data Zero mode is active:

  • Zero = Data Zero is off
  • Zero Av = Data Zero Average
  • Zero Pk = Data Zero Peak
  • Zero Mn = Data Zero Manual

Note that the Zero button has no effect (and is disabled) in Spectrum, Spectrogram, and Pitch Track (Sgram/PT) modes.


Macro Notes:

Zero=1 activates Screen Zero, Zero=0 turns it off, and Zero=x toggles between on and off.

Note that Zero is only enabled in waveform display modes (not Spectrum, Spectrogram, or Pitch Track). Attempts to change the Zero state while disabled will result in the macro being aborted with an error message.

ZeroDlg=1 opens the Zero control dialog, ZeroDlg=0 closes it, and ZeroDlg=x toggles between open and closed.

Note that the dialog does not need to be opened to change Zero modes directly via ZeroMode commands.


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