tag:blogger.com,1999:blog-1592992209402300549.post8053199737681498800..comments2024-03-18T23:24:35.194-04:00Comments on The Silicon Graybeard: Techy Tuesday: Software Defined RadioSiGraybeardhttp://www.blogger.com/profile/00280583031339062059noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1592992209402300549.post-48575197484647550152013-10-30T22:46:47.822-04:002013-10-30T22:46:47.822-04:00I think there's a project to do trunking with ...I think there's a project to do trunking with a pair of these as you suggest.<br /><br />The last I heard it was still "pre-release alpha" software, so I didn't look any further.drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-67737134627690280122013-10-30T20:19:23.444-04:002013-10-30T20:19:23.444-04:00Yes. Yes it does.
"Nyquist. It's not...Yes. Yes it does. <br /><br />"Nyquist. It's not just a good idea; it's the law!" <br /><br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-38048200182846647122013-10-30T20:18:29.252-04:002013-10-30T20:18:29.252-04:00It reminds me a lot of the 70s and 80s era scanner...It reminds me a lot of the 70s and 80s era scanners. Bearcat, Regency (RELM), Radio Shack - those guys. Cheap and dirty RF. It will receive a signal if conditions aren't too rough. <br /><br />The advantage here is completely in the SW. If the users can code different demods, it should be able to listen to <i>anything</i>. I would guess that it's possible to write trunk tracking software for it - or add another one to listen to the trunking commands, if need be. (I think some trunking systems need a second receiver channel, while others don't).<br /><br />I ordered one right after posting this. Probably be here next week, since it's Wednesday already. <br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-48352789599657543162013-10-29T23:45:35.785-04:002013-10-29T23:45:35.785-04:00It's "vweird" how Nyquist theory wor...It's "vweird" how Nyquist theory works for audio as well. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-71150319241231421152013-10-29T23:01:27.984-04:002013-10-29T23:01:27.984-04:00I've got both the "FUNcube Plus" don...I've got both the "FUNcube Plus" dongle, and one of the $20 "eBay specials".<br /><br />The FUNcube runs rings around the eBay special, but at 7 times the price, it should!<br /><br />There are several software packages out there, "SDR#" is for Windows, and Linrad, GNURadio, and one other one I forget the name of for Linux.<br /><br />The cheap ones *really* need a preselector in front of them, as they have about zero rejection of frequencies they're not tuned to.<br /><br />But for $20, and few $$ worth of front-end filter parts, they can be remarkably versatile.drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.com