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PSK modulation

Question asked by williamli on Dec 2, 2011
Latest reply on Jan 13, 2012 by enash

i want to make a BPSK modulation system works on 400MHz.i have two ideas.

one of them is choose the 1GSPS DDS chip,like AD9912,AD9910,to modulate directly.

another one is use a PLL chip with PSK modulation ,like ADF4158,to do it.

the first one have a question that the 400MHz frequency is high and the waveform is not perfect.

so i want to know which one is more reliable?

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