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:



Spectrum Analyzer

Signal Generator

(Absolutely FREE!)


Pitch Tracker


DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Spectral Event

    MHz Frequencies

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

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery


Product test

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Save Spectrogram Palette

Controls: Sgram/PT Dialog >> Colors >> Save Pal
Macro: SavePAL

After you have created a palette you like, you can save it to a .PAL (or .PLT) file by clicking on this button. You may also want to save several intermediate steps if you are creating a complex palette, so you can return to a known point if subsequent steps don't turn out just right.

Note: If you installed Daqarta to a folder other than the default, palette files will have a .PLT extension instead of .PAL. Otherwise, the files and all operations are identical.

You may want to use different palettes for different Spectrogram applications. You may find that certain palettes look better on certain digital projectors or laptops, or with certain color printers. (Note that a GrayScale palette comes with Daqarta which you can load for use with black and white printers.)

Or you may want your results to be easily compared to others that used a certain palette. For example, many older spectrograms were made with special equipment that used thermal paper; spectrograms were black on a white background, with higher levels (more heat) corresponding to darker blacks. That's the inverse of the GrayScale palette, which is white at higher levels and fades down to black.

If you have made changes to a palette during a session but haven't saved it, you will be prompted to do so when you exit Daqarta.

Macro Notes:

The SavePAL= macro has no effect if any File Open or Save As dialog is already active.

SavePAL= without a name will open the Save As dialog showing all .PAL (or .PLT) files, with the default set to Sgram.

SavePAL="MyFile" will open the Save As dialog with the default name set to MyFile. (Note that quotes are needed around all filenames in macros.) If you accept this by hitting Enter or the Save button in that dialog, Daqarta will assume you want to save a file named MyFile.PAL. If that file already exists, you will be prompted to replace it.

After either of the above commands, you may use IF.Posn?f=0 to see if the user has hit Cancel to exit the Save As dialog instead of choosing a file name. This allows your macro to exit gracefully or take other action.

A.SavePAL="MyFile" will save MyFile.PAL directly, without any Save As dialog. Note that if the file already exists, it will be overwritten without any confirmation prompt.

SavePAL can use string variables and expressions. For example, SavePAL=Field1 will use the contents of Field1 as the default file name, and A.SavePAL=Field1 will save a file with that name directly.

Similarly, if the Macro Variable Var0 holds a value of 12, then SavePAL="Test"+Var0 will set a default file name of Test12. If you expect to use a large series of files, you can use SavePAL="Test"+Var0(3) (for example) to set the decimal format to 3 integer places to get Test012. This will allow proper sorting by file name.

You can also copy the current palette to a macro array (Buf0 to Buf7) using the Buf0#P=n command, where n is a palette block number 0-3. See Copy Spectrogram Palette To/From Buffer Block under Macro Array Copy/Swap Operations.

See also Spectrogram / Pitch Track (Sgram/PT), Spectrogram / Pitch Track Controls, Spectrogram Color Palette Dialog


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