At 18:45 23/06/99 -0700, you wrote:
>I have a 2.4ghz transmitter and matching receiver that freq's are set by
>using a 16c54a and a SP5055s... Here's the problem..the steps are
>2400,2427,2454,2481---27mhz jumps...I need to program the pic to change
>this to much smaller differences...The pic I have is code protected and
>I can't figure out how they programmed it.. THE PRIZE..I will supply
>schematics of the hook up to anyone that thinks they can do this and I
>will give you the neatest 2.4ghz trans and receiver combo around if you
>can solve the problem...Each unit has 1 video channel and 2 audio
>channels...very high power output in a small package...Hmmmm who could
>we watch with this???   Mike
>
>

These are simple PLLS you can get the imformation on the AMRC values to be
placed into the PLL from the data sheets, you will need to know the
reference frequency and the current divide values (Simple to measure and
calculate). The you will have to see if the PIC is controlling the power
stage bias with the aid of a lock signal and some other goddies. This is
quite simple code to create and can be done in about a day or so. So there
is not a real need to recover the codee from the PIC, just need the circuit.

Have fun

Dennis