ANTRF
2010-07-21, 06:06 PM
NEW 2011 version
It's only for audio frequency, but is good material for university students....and prof...
As usual a lot of important new features ...and more. For example, as you can see from the picture below, the waterfall (3D checkbox on main panel) has been added.
Then, a very strong new feature is the possibility to evaluate the measurements uncertainty (as far as I know not still present in other programs of this category). This is a huge field, and I'm simply trying to explore it moving the first steps.
For example, below you can see the "settings" window with the option allowing to set the values of the most significant error cause of "B" type, that is the Quantization Error, Jitter, Offset, Gain, Noise and linearity due to the acquisition board (for example the sound card). Also, the set up option for another kind of uncertainty, that is the "A" uncertainty, known as "statistic uncertainty".
By the way, for each implemented instrument there is the possibility to invoke a "statistical window" (see figure below) which allows to compute in real time the frequency Istogram, mean, standard deviation and extended uncertainty.
Another important feature is the Monte Carlo virtual input device. That is, the user can select as input device (in setting windows) the "Monte Carlo" device (you should select the checkbox "Monte Carlo" in settings window, under the tab "device"). Then, after you have turned on Visual Analyser, the input waveform selected from the "montecarlo settings" menu of the figure above (of the settings window) will be internally generated. The parameter you set for the error (quantization, noise, gain etc.) will be applied to the waveform synthetized allowing to evaluate, by means of the "statistical window", the uncertainty of measurements (Monte Carlo analysis).
Each measurement instrument can compute the overall uncertainty (statistical plus "B" uncertainty) in real time. That is the frequency meter, the voltmeter, and the ZRLC. The spectrum analyzer and oscilloscope at the moment can compute only the statistical uncertainty. In each instrument there is a checkbox for the real time calculus of overall (extended) uncertainty, composed from the A + B uncertainty, and a checkbox to invoke the statistical window (they can be checked both)
The remaining (and not less important) new functions introduced in 2011 version are:
+ preview window in filter setting and possibility to define the number of "tap" of FIR filter
+ NO flickering on all the graphic window (spectrum analyzer, oscilloscope etc) by means of double buffering;
+ New frequency meter option, allowing to set a threshold for the calculus of the peak harmonic. In this way only the harmonic that exceeds a predefined threshold respect the overall amplitude in % full scale;
+ Enhanced 24 bit setting;
+ New screen shot windows to capture scope and spectrum graphic, with possibility to save to file and clipboard;
+ Spectrum with "full", "Single" and "min max" option. Full means plot each harmonic; "Single" means to plot only the harmonic of maximum amplitude for each pixel; "min max" means to plot only the harmonic with the minimum and maximum value for each pixel; this latter produce a graphic identical to the "Full" modalities, but saving computational resource. On the other hand, also the "Single" option allows to save resource (more than "min max") but painting only the higher value of harmonic;
+ In scope windows possibility to select "full" and "min max" option;
+ A lot of minor bugs fixed;
enjoy....
ANTRF
It's only for audio frequency, but is good material for university students....and prof...
As usual a lot of important new features ...and more. For example, as you can see from the picture below, the waterfall (3D checkbox on main panel) has been added.
Then, a very strong new feature is the possibility to evaluate the measurements uncertainty (as far as I know not still present in other programs of this category). This is a huge field, and I'm simply trying to explore it moving the first steps.
For example, below you can see the "settings" window with the option allowing to set the values of the most significant error cause of "B" type, that is the Quantization Error, Jitter, Offset, Gain, Noise and linearity due to the acquisition board (for example the sound card). Also, the set up option for another kind of uncertainty, that is the "A" uncertainty, known as "statistic uncertainty".
By the way, for each implemented instrument there is the possibility to invoke a "statistical window" (see figure below) which allows to compute in real time the frequency Istogram, mean, standard deviation and extended uncertainty.
Another important feature is the Monte Carlo virtual input device. That is, the user can select as input device (in setting windows) the "Monte Carlo" device (you should select the checkbox "Monte Carlo" in settings window, under the tab "device"). Then, after you have turned on Visual Analyser, the input waveform selected from the "montecarlo settings" menu of the figure above (of the settings window) will be internally generated. The parameter you set for the error (quantization, noise, gain etc.) will be applied to the waveform synthetized allowing to evaluate, by means of the "statistical window", the uncertainty of measurements (Monte Carlo analysis).
Each measurement instrument can compute the overall uncertainty (statistical plus "B" uncertainty) in real time. That is the frequency meter, the voltmeter, and the ZRLC. The spectrum analyzer and oscilloscope at the moment can compute only the statistical uncertainty. In each instrument there is a checkbox for the real time calculus of overall (extended) uncertainty, composed from the A + B uncertainty, and a checkbox to invoke the statistical window (they can be checked both)
The remaining (and not less important) new functions introduced in 2011 version are:
+ preview window in filter setting and possibility to define the number of "tap" of FIR filter
+ NO flickering on all the graphic window (spectrum analyzer, oscilloscope etc) by means of double buffering;
+ New frequency meter option, allowing to set a threshold for the calculus of the peak harmonic. In this way only the harmonic that exceeds a predefined threshold respect the overall amplitude in % full scale;
+ Enhanced 24 bit setting;
+ New screen shot windows to capture scope and spectrum graphic, with possibility to save to file and clipboard;
+ Spectrum with "full", "Single" and "min max" option. Full means plot each harmonic; "Single" means to plot only the harmonic of maximum amplitude for each pixel; "min max" means to plot only the harmonic with the minimum and maximum value for each pixel; this latter produce a graphic identical to the "Full" modalities, but saving computational resource. On the other hand, also the "Single" option allows to save resource (more than "min max") but painting only the higher value of harmonic;
+ In scope windows possibility to select "full" and "min max" option;
+ A lot of minor bugs fixed;
enjoy....
ANTRF