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This applet is a powerful signal
analyze toolkit. It turn you computer into a waveform generator and a spectrum
analyzer. It can read from a WAV file. The Spectrum, relation, histograms,
waterfall, transfer function and digital filter are integrated into this
applet. You can also download a local version
of this applet, which can run in windows 95/98 or windows NT.
If you can't see a RUN button and
a STOP button below, you browser do not support JAVA applet, or you closed
the support to JAVA applet in security setting of your browser. Use a browser
that support JAVA applet, such as IE3.0, or open the security switch.
Press RUN below to start this applet
and to see how strong it is.
For the security of browser, a JAVA
applet can't access local resources of you computer, So it can't read or
write files in your computer. This is very inconvenient for designer and
user in some occasion. To add a JAVA applete the ability of access local
resources, we design a little program,
Localman,
to work with this applet. Download Localman and
run it in your computer, then the applet can access the local resources
via Localman. Otherwise the applet can only used as a demo.
I had tested
that IE3.0 support Localman, but Netscape 4.0 do not support it. To check
whether your browser support Localman is very simple: Run Localman
first, then open SAT switch in the applet. If it show success, you browser
support Localman, otherwise your browser do't support it.
Help Message
1.Toolbar
a)Open a data file of WAV, TXT,
or DAT. (This function need support of Local man.)
b)Save signal to a WAV, TXT or DAT
file. (This function need support of Local man.)
c)Curve cursor: This function is
used to show the value of a special point in the curve. Move mouse to the
point you want to know.
d)Peak List: This function is used
to list the peaks in curve. Move mouse to the point you want to know, then
click mouse to select it. You can select many points at one time, then
press "show" button to see the values of them.
e) To Clipboard(BMP): This function
copy the analyze result to clipboard.
f) To BMP File: This function save
the analyze result to a Bitmap file.(This function
need support of Local man.)
g) To Word: This function insert
the analyze result to Word. Before use this function, You should run Word
first, and open a new file, then go back to this applet. (This
function need support of Local man.)
h) To Printer: This function copy
the analyze result to a printer.(This function need
support of Local man.)
i) To Editbox: This function copy
the analyze result to editbox in applet, Press "show" button to see.
j) To TXT File: This function save
the analyze result to a TXT file.
(This function
need support of Local man.)
k) To Excel: This function insert
the analyze result to Excel. Before use this function, You should run Excel
first, and open a new sheet, then go back to this applet. (This
function need support of Local man.)
l) Help: Show help message. (This
file.)
m) Demo: Show the main functions
of the applet. This will take about two minutes.
n) Home: Show the WWW address of
designer.
.
2 Level
Scroll
The level scroll is used to move
the signal in display window.
.
3 Vertical
Scroll
The vertical scroll is used to zoom
in tht signal wave.
.
4.SAT Switch
This button
is used to open or close the local resources accessing switch. If you chose
open, a echo client function is active, it transmit the related requests
of applet to Localman(echo server) to access local resources.
Caution: Localman
must run first, otherwise the applet should be blocked.
.
5.Show
Button
This button
is used to open editbox to see data transfer to it.
.
4. Menus
(1) Signal
a) Read File (This
function need support of Local man.)
This function read signal from a
WAV, TXT or DAT data file format. The DAT data file format is defined as:
"ILFI"
/*File Mark
4 char */
Nch
/*Channel number 1 int
*/
Mlen
/*data length
1 long int */
dt
/*sample interval
1 float */
v[1]
/*CH 1 scale factor 1 float
*/
:
v[Nch]
/* CH N scale factor 1 float
*/
x[1][1]
/*data 1 of CH 1
1 int */
:
x[N][1]
/*data 1 of CH N
1 int */
x[1][2]
/*data 2 of CH 1
1 int */
:
x[N][2]
/*data 2 of CH N
1 int */
:
x[1][M]
/*data M of CH 1
1 int */
:
x[N][M]
/*data M of CH N 1 int
*/.
b)Save (This
function need support of Local man.)
This function save signal to a WAV,
TXT or DAT file.
c) Signal Generate
This function is used to produce
a stimulate signal source of white noise,sine, and so on.
d) A/D(Sound Card) (This
function need support of Local man.)
This function is used to record
a signal from a sound card.
e)Exit
This function close applet window
and return to browser.
.
(2)Wave
a) Wave of CH1: This function display
waveform of CH1.
b) Wave of CH2: This function display
waveform of CH2.
c) Wave of CH1&CH2: This function
display waveform of CH1 and CH2.
d) Shaft Centerline Orbit
This function display a shaft centerline
orbit composed by CH1 and CH2. CH1 is X direction signal and CH2 is the
Y direction signal.
.
(3)Time
a) Auto Correlation
This function display the auto correlation
signal of CH1 or CH2.
b) Cross Correlation
This function display the cross
correlation signal of CH1 and CH2.
c) Power Cepstrum
This function display the power
cepstrum signal of CH1 or CH2.
.
(4)Spectrum
a) Power Spectrum
This function display the power
spectrum of CH1 or CH2.
b) Amplitude-Phase Spectrum
This function display the Amplitude-Phase
Spectrum of CH2 or CH2.
c) Real-Imaginary Spectrum
This function display the Real-Imaginary
Spectrum of CH1 or CH2.
d) Transer Function
This function display the transer
function of CH1 or CH2. That CH1 is input signal and CH2 is output signal.
e) Coherent Function
This function display the coherent
function of CH1 or CH2. That CH1 is input signal and CH2 is output signal.
.
(5)Array
This function display the spectrum
array(Waterfall) of CH1 or CH2.
.
(6) ZOOM
This function use ZOOM FFT technique
to display a zoom spectrum.
.
(7) Histogram
This function display the histogram
of CH1 or CH2.
.
(8) Filtering
a) Filter
Design
This function
is used to design a internal digital filter.
c) Signal
filtering
This function
use the internal digital filter to filter the signal of CH1 or CH2.
d) Signal
Enveloping
This function
use the internal digital filter to extract the envelop signal of CH1 or
CH2.
e) DC Remove
This function
is used to remove the DC part in CH1 or CH2.
f) Resample
This function
is used to resample all channel signal.
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