So..how noisy is this type of rcvr? I like very quiet receivers. Let's say compared to my old analog only stuff, like a Collins 75S-3, Drle R-4B etc.
Thanks, 73, Lee -----Original Message----- From: Brian Lloyd <brian-wb6...@lloyd.com> To: Drax Felton <draxfel...@gmail.com> Cc: FlexRadio List <flexradio@flex-radio.biz> Sent: Tue, May 15, 2012 10:46 am Subject: Re: [Flexradio] Imagine digital starting at the antenna connector... On Tue, May 15, 2012 at 7:07 AM, Drax Felton <draxfel...@gmail.com> wrote: > So how does a lack of base band conversion improve upon what the flex 5000 already does? Drax, you need to understand how a direct sampling receiver works. In ssence, it uses an analog-to-digital converter connected directly to the ntenna. (In reality there is buffering, matching, and filtering to keep nwanted signals out of the A:D but the basic concept is the same.) The ther part of the secret is called decimation, which allows you to trade andwidth for dynamic range. So the receiver can go from being a wide-band, ee-everything-from-1.8MHz-to-54MHz, radio, to a narrow-band radio with orld-class dynamic-range and IP3 numbers at the flip of a software switch". (BTW, it does still need a good front-end filter.) So, yes, a direct-sampling radio would be a game-changer (in my ot-so-humble opinion). -- rian Lloyd, WB6RQN/J79BPL 191 Western Dr. ameron Park, CA 95682 r...@lloyd.com 1.767.617.1365 (Dominica) 1.916.877.5067 (USA) ______________________________________________ lexRadio Systems Mailing List lexra...@flex-radio.biz ttp://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz rchives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ nowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
