... 21jan14: IF 280->40 Mhz, noise + 20Mhz pncode . ... IF input at 30 MHZ . Signal comes it at 30 MHZ IF. sample this signal at 160 Mhz with a single a/d of the mocks . ... For the first few filter steps: 2,3,4,5 the rms will grow linearly since there is no power being removed. ... So we can pick a much lower input level (say 60millivolts) and then use the up shift at the end to put the signal into our 4 bits. ... You need to put a filter between the noise source and the 260 Mhz amplifiers. ...