Free to download and try.
Virtins MultiInstrument consists of a sound
card dual trace oscilloscope, a real time spectrum
analyzer, and a signal generator and can run them
concurrently. It features a specially designed data
acquisition approach, which is able to monitor the
input signal continuously without missing any trigger
event before a frame of data is collected. It has
a very fast screen refresh rate. It supports sophisticated
triggering method including pre-trigger and post-trigger.
A comprehensive range of functions are provided,
including waveform addition and subtraction, Lissajous
Pattern, transient signal recording, voltmeter,
RMS amplitude spectrum, relative amplitude spectrum,
octave analysis(1/1,1/3,1/6,1/12,1/24),THD, THD+N,
SNR, SINAD, peak hold, phase spectrum, auto correlation,
cross correlation, function generation, multitone
generation, arbitrary waveform generation, white
noise and pink noise generation and sweep signal
generation. It Supports 8, 16, 24 bits and multilingual
user interface, including English, French, German,
Italian, Spanish, Portuguess, Simplified Chinese,
Traditional Chinese, Japanese, and Korean.