PPM transmitter and receiver

Hi
I want to build a PPM transmitter and reciever and maybe then a NRZ to PPM converter?
Could you help me how to build it .
I need the schematics

you can use the digital counter to realize the pulse position modulation

Take a look at the UAA4000 (transmitter) and the UAA4009 (receiver) PPM pair ..
http://www.datasheets.org.uk/search....000&sType=part
http://www.datasheets.org.uk/search....ExactDS=Starts

Regards,
IanP