On 16 Mar 2007 18:19:26 -0700, "veck" wrote
in .com:

hi
can anyone help me. I am using a crystal control PLL. The PLL chip
contains Phase detector, charg pump loop filter, and VCO and divider
feedback to phase detector. Now I would like to use another signal
(audio) and modulate the two and transmite. my only problem is cannot
figure out what to use to modulate the two signals. Please if you have
any suggestion help.


The Philips datasheet for the 4046 includes a really good primer on
PLL circuits. I suggest you start there.