"Baseband" refers to the fact that the QSD down-converts the RF to IQ streams at directly near-audio range frequencies. The ADC converts this to digital, and the DSP then does the demodulation. From the description, the "IF" frequencies are in the 10 KHz range. So, the "baseband roofing" filter will be a selectable active "audio" filter operating in this range, prior to the ADC. This will prevent excessive "out of band" energy from reaching the ADC.
Bruce, N1RX ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
