Virtins Sound Card Signal Generator is a sound card based Signal Generator and an off-line Oscilloscope.

Virtins Sound Card Signal Generator is a powerful PC based virtual instrument. It consists of a sound card based Signal Generator and an off-line Oscilloscope.

The dual channel Signal Generator (Sweep/Arbitrary/Function Generator) provides the following types of waveform for output: Sine, Square, Triangle, Saw Tooth, White Noise, Pink Noise, Multi-tones, Arbitrary via user-configurable waveform library, MLS, Musical Scale, DMTF, at either a fixed frequency, or a frequency that sweeps linearly or logarithmically within specified frequency range and time duration. Amplitude sweep is supported.

The dual-channel off-line Oscilloscope provides four types of views: Wave form display of Channel A and Channel B, Wave form display of Channel A + Channel B, Wave form display of Channel A - Channel B, Lissajous Pattern display for Channel A and Channel B.

The off-line Oscilloscope can be used to view the signal generated by the Signal Generator. It can also be used to view the WAV files recorded by other sound recording software.

Here are some key features of "Virtins Sound Card Signal Generator":

· Bandwidth: 10 Hz - 96 kHz (sound card dependent).
· Maximum Output Voltage: about 2 V (sound card dependent).
· Selectable sampling frequency (up to 192 kHz), sampling bit resolution (8, 16 or 24 bits) and sampling channels (one or two) (sound card dependent).
· Support predefined waveforms: Sine, Rectangle, Triangle and Saw Tooth. The duty cycle for a rectangle wave is adjustable.
· Support non-repetitive pink noise and white noise generation.
· Support multi-tones generation. A Multi-Tones is a combination of predefined waveforms with different amplitudes, frequencies, and phases. Pink noise and white noise with specified amplitude can also be added into the multi-tones. Maximum 32 tones can be combined in each channel.
· Support arbitrary waveform generation through user defined waveform library. A waveform library is a TXT file containing the coordinates of each point in one cycle of the waveform. There is no limit as to how many points can be used to define a waveform.
· Support Maximum Length Sequence (MLS) generation. The length can be selected from 127 to 16777215.
· Support Dual Tone Multi-Frequency (DTMF) generation.
· Support musical scale tone generation.
· The predefined waveform, multi-tones and user-defined waveform can be generated at a frequency that sweeps linearly or logarithmically within a specified frequency range and time duration.
· The predefined waveform, white noise, pink noise, multi-tones, user-defined waveform and MLS can be generated at an amplitude that sweeps linearly or logarithmically within a specified amplitude range and time duration.
· Allow to specify the phase difference between the two channels if the output signals have the same frequency.
· The amplitude of the output signal is adjustable.
· The generated signal can be saved as a WAV file or a TXT file for a duration of up to 1000 s.
· Support calibration of the output channels.
· The output signal can be looped back partially (i.e. only one channel while the other channel can be used for field input) or fully (i.e. both channels), via the software itself, to the input of the oscilloscope for display and analysis in real time. Synchronized operation between the Signal Generator and the Oscilloscope with timing accuracy in the same order of the sampling frequency is also supported. It is possible to specify when to start the Oscilloscope after the Signal Generator is started.
· It is possible to add a mask with specified periodic on/off timing to the signal to be output so that a burst-type signal can be generated. You can choose whether to phase-lock each burst.
· The waveform displayed in the Oscilloscope can be played or cyclically played.


Requirements:

· 8, 16 or 24 bit Windows compatible sound card


Limitations:

· 21 days trial

What's New in This Release: [ read full changelog ]

· New: Multi-Instrument
· New: Multi-Instrument Pro
· New add-on: Spectrum 3D Plot
· New add-on: Data Logger
· New add-on: LCR Meter
· New add-on: Device Test Plan
· Merged the softkey license and hardkey license
· Added Multimeter, including RMS, dBV, dBu, dBSPL, dBA, dBB, dBC, Freq. Counter,RPM,Duty Cycle,F/V Meters
· Added Spectrum 3D Plot, including Waterfall Plot and Spectrogram.
· Added Data Logger.
· Added LCR Meter.
· Added Device Test Plan.
· Added "Open Frame by Frame" command in the File menu to allow loading a long wave file.
· Added "Import" command in the File menu to allow the import of text data.
· Allow input & output sound card selection via the Calibration dialog.
· Added "Reference" tab for all relevant views, to allow the display of reference curves.
· Added "Line Width" in all relevant Chart Options pages.
· Allow differential trigger in DAQ
· Added sample files, settings, examples in the software package.
· Added "Play" and "cyclic Play" buttons in the Miscellaneous Toolbar to allow direct replay of the waveform in Oscilloscope
· Added various digital filtering methods in Oscilloscope.
· Added time stamp and DAQ process indicator in Oscilloscope.
· Added "Record" mode in Oscilloscope.
· Added frequency compensation, frequency weighting A,B,C,ITU-R 468) in Spectrum Analyzer
· Added Noise Level,IMD,Bandwidth,Crosstalk measurement in Spectrum Analyzer
· Added Coherence, Gain & Phase (Bode Plot), Impulse Response modes in Spectrum Analyzer
· Added "iA=oA, iB=oA", "iB=oA", "Sync. No Loopback", "Sync. iB=oA", "Sync.iB