VIRTINS Pocket Multi-Instrument is a powerful Pocket PC based virtual instrument software. It consists of a real time oscilloscope, a real time spectrum analyzer and a signal generator, and can run them simultaneously. Unlike most of the sound card oscilloscopes in the market which search trigger event after data collection, it features a specially designed data acquisition approach which is able to monitor the input signal continuously without missing any trigger event before the frame of data is collected. As a result, it boasts a very fast screen refresh rate and thus a truly real time response. It supports sophisticated triggering method including pre-trigger and post-trigger which are generally missing from other sound card based instruments. It features zooming and scrolling function and allocates most of the screen for data display, all of which are essential for you to explore the fine details of the measurement data. In contrast, most of other sound card based instrument spent much precious screen space to simply mimic the panel of the conventional instrument. It provides a comprehensive range of functions including wave form addition, wave form subtraction, Lissajous Pattern display, transient signal recording, RMS amplitude spectrum display, Relative amplitude spectrum display, phase spectrum display, auto correlation coefficient display, cross correlation coefficient display, function generation, arbitrary waveform generation, white noise and pink noise generation and sweep signal generation, etc. It stores data in either standard WAV file or TXT file. It supports WAV file importing and BMP file exporting and printing.