Great explaination Abel. It's been a long while since I've heard anyone discuss phase jitter, signal to noise ratio and noise fiqure. I wonder if the receiver(s) use I and Q quadrature dectection, the type of filters and how they deal with differental group delay or if it is all DSP now. At any rate, I am amazed they can offer so much technology for so little cost to the consumer. If you remove $160 (the cost of a computer radio) your left with $40. At wholesale this is maybe $15 for a lot of development.