I m studying fsk modulation and demodulation on the 7856R board. And i m puzzled. modulation involves generating sine wave with two different frequencies. but how to trigger the change of frequency? Also, demodulation has a lot of methods， such as envelope detection, delay multiplier, zero-cross. But there are so few modules in Labview FPGA, i dont know how to solve it . And sychronization is also a big problem. I m so confused ,who can help me please ,give me some reference examples please, thank !!!!!!!
appendex is some vis that are not correct...please help me！！！！
