//This script is subject to copyright law.
//This script may not be copied or used in any way without permission
//from mhSoft, Amsterdam (The Netherlands).
//
//Copyright 1999 mhSoft
monate = new Array(12);
monate[0] = 'jan.';
monate[1] = 'feb.';
monate[2] = 'mrt.';
monate[3] = 'apr.';
monate[4] = 'mei';
monate[5] = 'jun.';
monate[6] = 'jul.';
monate[7] = 'aug.';
monate[8] = 'sep.';
monate[9] = 'okt.';
monate[10] = 'nov.';
monate[11] = 'dec.';
tage = new Array(7);
tage[0] = 'zondag';
tage[1] = 'maandag';
tage[2] = 'dinsdag';
tage[3] = 'woensdag';
tage[4] = 'donderdag';
tage[5] = 'vrijdag';
tage[6] = 'zaterdag';
function machDatum(datum)
{
var tag = tage[datum.getDay()];
var monat = monate[datum.getMonth()];
var jahr = datum.getYear() + 1900;
var datumstring = tag + ' ' +datum.getDate() +' ' +monat + ' ' +jahr;
return datumstring;
}
function zeit(datum)
{
var stunde = datum.getHours();
var minute = datum.getMinutes();
if (stunde < 10) stunde = '0' + stunde;
if (minute < 10) minute = '0' + minute;
zeitstring = stunde +':' +minute;
return zeitstring;
}
//berechne frequenzkurve
//
function direktfreqcurve()
{
if((eval(document.b4box.vb.value.length) == 0 ) ||
(eval(document.b4box.fb.value.length) == 0 ) ||
(eval(document.b4box.qts.value.length) == 0 ) ||
(eval(document.b4box.fs.value.length) == 0 ) ||
(eval(document.b4box.vas.value.length) == 0 ) ||
(eval(document.b4box.ql.value.length) == 0 )) { alert("een van de velden is niet ingevuld...");
}
else
{
fvb = eval(document.b4box.vb.value);
ffb = (eval(document.b4box.fb.value));
fqts = (eval(document.b4box.qts.value));
ffs = (eval(document.b4box.fs.value));
fvas = (eval(document.b4box.vas.value));
fql = (eval(document.b4box.ql.value));
start = 10;
stop = 205;
stap = 5;
a = (ffb / ffs) * (ffb / ffs);
b = (a / fqts) + (ffb / (fql * ffs));
c = 1 + a +(ffb / (fql * (ffs * fqts))) + (fvas / fvb)
d = (1 / fqts) + (ffb / (fql * ffs));
datum = new Date();
breite = screen.width;
hoehe = screen.height;
xpos = ((breite - 770)/2);
ypos = ((hoehe - 380)/2);
Para = 'WIDTH=770,HEIGHT=420,screenX='+xpos+',screenY='+ypos+',status=no,toolbar=no,menubar=no,scrollbars=yes';
myWin=open('','newWindow',Para);
myWin.document.open();
//dokument erstellen
myWin.document.write('Frequency Response');
myWin.document.write('');
myWin.document.write('
Frequency Response ');
myWin.document.write(start +' Hz .. '+ stop +' Hz / '+ stap +' Hz
');
myWin.document.write('Datum : '+machDatum(new Date()));
myWin.document.write(', '+zeit(datum)+' uur.
');
myWin.document.write('Vas: '+fvas+' , fs: '+ffs+' , Qts: '+fqts);
myWin.document.write(' fb: '+ffb+' , Vb: '+fvb+' , Ql: '+fql);
myWin.document.write('
');
myWin.document.write('');
myWin.document.write('');
i = 1;
for (var zaehler=start/stap; zaehler <=stop/stap; zaehler++)
{
ffs2=ffs;
w = zaehler*stap / ffs2;
u = w * w;
x = u * u;
e = x / Math.sqrt((x - c * u + a) * (x - c * u + a) + (b * w - d * u * w) * (b * w - d * u * w));
e = 20 * Math.log(e)/Math.LN10;
freq = zaehler*stap;
//convert num to string
freq = freq.toString();
freq = freq.substring(0,5);
tekst = e;
tekst = tekst.toString();
tekst = tekst.substring(0,5);
e = tekst;
myWin.document.write('| f: '+ freq +' Hz, '+ e +' dB | ');
if ((i % 5) == 0) myWin.document.write('
');
i = i + 1;
}
myWin.document.write('
');
myWin.document.write('| ');
myWin.document.write('');
myWin.document.write(' | ');
myWin.document.write('');
myWin.document.write(' |
');
myWin.document.close();
}
}