hi i choosed the VCO resistor & capacitor According to the formula ( f min= 1/(R2(C1+32pf)), f max =(1/(R1(C1+32pf)))+f min) my Fmin is 10KHZ and Fmax is 20KHZ.
And i have not connected any loop filter. i have checked the offset frequency.
But the output is very worst, I'm not getting the exact squrwave(VCO OUT). I have checked the connection, every thing is correct.
If I connect the capacitor between the VCOout-pin and ground, then the output is somewhat ok.
Warm Regards