Engineering Design NIDisk Guia do Utilizador descarregar pdf (Página 7)

1. Overview

NIDisk

provides direct-to-disk data acquisition and playback using analog I/O cards from

National Instruments. Program capabilities include:

• Recording up to 8 input channels at up to 1.5 MHz aggregate sample rate

• Playback of 1 or 2 channels at up to 1.5 MHz aggregate sample rate

• Simultaneous recording and playback

• Programmable input gain up to 100 (depending on I/O card)

• Recording and playback can be initiated by external TTL trigger

• TTL output signal provided for synchronization with external systems

• Recording and playback duration up to the capacity of the hard disk

• Record and play sound data in either SIGNAL or Wave file format

• Operates with all current National Instruments desktop and PCMCIA cards

• Runs under Windows 2000/XP

NIDisk supports both desktop and notebook I/O cards. Sample applications include:

• Use with a notebook computer to perform continuous data acquisition in the field up to

ultrasonic frequencies, replacing an expensive ultrasonic or multi-channel recorder

• Use with a notebook computer to perform field playbacks up to ultrasonic frequencies

• Use with a desktop computer to provide an inexpensive I/O workstation for streaming

data collection in the lab, for later analysis in SIGNAL or RTS

NIDisk can store acquired data in either SIGNAL or Wave file format. Both file types can be

read directly into SIGNAL or RTS for display and analysis. Applications for NIDisk sound

files within the SIGNAL family include:

• Review, measure, and edit sound data in the RTS

• Produce continuous spectrograms in SIGNAL

• Automatically analyze recorded files for sound events using the Event Detector

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Engineering Design NIDisk Guia do Utilizador Página 7