Would it be more accurate to describe this as a "software radio" rather than just stating that it uses "PLL technology"? My old Prism 7 uses PLL synthesizer technology to allow me to set it to any channel instead of having to change a crystal. That's old news, its used in practically every radio receiver that's made these days (its a lot cheaper than the old variable capacitor / pulley / drive system!). This radio sounds like a Korean version of the Berg, a Digital Signal Processor based device.
Adding a Digital Signal Processor into a radio changes everything. It would be true to say that the capabilities of the radio then become determined by how big a DSP you want to use and how ingenious and skilled the DSP programmers are. "Big" in DSP terms doesn't have to be very large physically or in terms of power these days -- you only need something hot and heavy if you're processing video. The DSP that's in these radios is probably similar to the one in your cellphone, an application that's a lot more complex than even the most exotic R/C receiver. (To illustrate just how ingenious programmers can be a company has recently announced code components that when added to a cellphone's firmware allow it to receive and process GPS -- a very useful idea because adding a real GPS receiver to a phone adds significant cost and power drain.) These soft radios will be very capable but they won't be perfect because the signal format used in R/C isn't designed to be tolerant to interference. I suspect that the hyper selectivity issue isn't how they discriminate between transmitters, it would make more sense to try and correllate on the properties of the R/C frame. The Koreans -- or Berg for that matter -- will have to come clean about what they're doing before I'll use their receivers. I like the idea of a soft radio but I don't like magic, clever code tends to get very expensive to test and the possibilities for interesting 'bugs' that cause planes to fall out of the sky increase. Sometimes conservative technology is the best to use. Martin Usher ----- Original Message ----- From: "Simon Van Leeuwen" <[EMAIL PROTECTED]> To: "5-Soaring Forum" <[EMAIL PROTECTED]>; "2-IMAC" <[EMAIL PROTECTED]>; "4- GSAL" <[EMAIL PROTECTED]>; "8-E Zone" <[EMAIL PROTECTED]>; "6-CRCSS" <[EMAIL PROTECTED]> Sent: Wednesday, June 02, 2004 6:52 PM Subject: [RCSE] Electronics - New Stuff RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
