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!

Close Data File

Controls: File Menu >> Close
Macro: Close

You can close a previously-opened data file from this File menu option, or you can simply toggle off the DD / Open button in the toolbar.

You only need to explicitly close a data file if you want to return to live Input or Generator operation. If you just want to view a series of files, simply opening the next one will cause the prior one to be closed automatically.

If you have changed the Notes or User Units calibration for the file, when you attempt to close it (or open another, or when you attempt to exit Daqarta) you will be reminded of this and prompted to save it.

However, only .DQA files can hold Notes and calibration information, so be sure to save single-screen files in that format if you want to preserve these.

If you are prompted to re-save long DDisk (.DQA or .WAV) files, there is no format option... they are always saved in .DQA format. Even if the file has a .WAV extension, it will really be a .DQA file in order to include the extra information. Such files can still be read by other software that follows the standard rules for reading .WAV files, which require ignoring any information they can't handle properly. (Long .DAT files can not be re-saved.)


Macro Notes:

Close= (no parameter needed) will close any open data file. If there is no file open, the command is ignored.

This is useful in macros that are, for example, about to toggle Generator or Input on, since those are disabled when a file is open and would provoke a "Control disabled. Aborting macro" error.


See also File Menu, Open Existing Data File, Open Recent Data File

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