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WaveDisk User Guide

Acquisition parameter screen

To perform an acquisition, click I/O | Acquire on the WaveDisk menu. WaveDisk then

displays the Acquisition parameter screen. This screen allows the user to specify output

filename, output file type, repetition mode, acquisition duration, sample rate, and buffer

mode. These are described here. Acquisition begins when the user clicks OK.

I/O device selects the I/O device to use for the acquisition. A computer may have multiple

"sound card" devices, such as a built-in sound chip and external USB sound card unit.

Filename specifies the name of the output sound file. Include file extensions, for example,

enter "myfile.wav". Filenames may include a drive letter and directory path; otherwise files

are stored in the directory containing WaveDisk.

File type may be SIGNAL or Wave. Files are written in uncompressed 16-bit coding (0

offset, ±32768 range). For Wave files, this is the "PCM" or "type 1" standard

Wave

file

format.

Repetition mode indicates whether to acquire the specified duration and stop ("Single") or

acquire the specified duration, then continue acquiring indefinitely, overwriting previous data

("Continuous"). Continuous mode delivers the most recent duration seconds of acquired data.

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Engineering Design NIDisk Manuale Utente Pagina 11