Back ]

Detailed Features about:

  1. Oscilloscope (dual channel, xy, time division, trigger);

  2. Spectrum Analyzer with amplitude and phase display (linear, log, lines, bar, octaves band analysis 1/3, 1/6, 1/9);

  3. Wave-form generator with "custom functions" plus triangular, square, sinus, white noise and pulse generation (NO ALIASING: the waveform are built using band-limited algorithms);

  4. Frequency meter (in time and frequency domain) plus counter;

  5. Volt meter with rms and peak to peak readout;

  6. Filtering (low pass, hi pass, band pass, band reject, notch, "diode", DC removal);

  7. Memo windows for analysis and file storage of time series and spectrum;

  8. A TRUE software digital analog conversion (for complete signal reconstruction).
     

(1) - Oscilloscope

Click to enlarge in a new window

 

(2) - Spectrum Analyser

Click to enlarge in a new window

 

(3) - Wave-form generator

Click to enlarge in a new windowClick to enlarge in a new window

 

(4) - Frequency meter

Click to enlarge in a new window

 

(5) - Volt meter (calibration needed)

Click to enlarge in a new window

 

(6) - Filtering

Click to enlarge in a new window

 

(7) - Memo windows

Click to enlarge in a new windowClick to enlarge in a new window

 

(8) - real time DIGITAL/ANALOG conversion

Points (8) need a clairification:

***********************************************************
VA has the unbeatable capacity to perform a full real time
Digital-Analog conversion for the oscilloscope function.
***********************************************************

Consider using a frequency sampling of (standard) 44100 Hz, with a 16 bit resolution (resolution is not relevant for the purpose of the discussion below...)

Other programs similar to VA simply plot the raw points on the screen, which means you canít easily analyze signals with a frequency higher than 3000/5000 Hz (there are limited points to plot). Even worse, think a sinusoidal signal of 20 KHz. You would have only 2 points (more or less) per cycle! ... The Nyquist theorem says that it is sufficient to RECONSTRUCT the signal...try to see what happens if you draw a sine with only two points ...it will appear like a triangular waveform...

Try the power of VA enabling the function "full D/A", apply a sinusoidal signal of 15-20 KHz (for example using the Waveform generator included in VA) finally use the "Time division" control for the selected channel (mS/d) to display the signal at the desired detail level. You will see a perfect waveform with all the points of the original signal (not only two).