View Full Version : how can i create a variable freq qpsk mod and demod

02-26-2005, 03:49 AM
i want to create a qpsk transceiver board
:( it is making it difficult for me to create this in vhf band and i also wanted to vary frequency at different times
:?: how can i achieve phase shifts? any circuit?
:idea: any ideas
can somebody help me out please [/b]