We wish to set up a SDR Laboratory I need information regarding equipments for that I will be thankful if one of you would guide me
AZS --- On Sat, 9/26/09, Leif Asbrink <[email protected]> wrote: From: Leif Asbrink <[email protected]> Subject: [soft_radio] Re: Wish List for SDR software To: [email protected] Date: Saturday, September 26, 2009, 3:13 PM Hi Chris, > I really appreciate your suggestions. It seems like I should > install LinRad but when I tried a few weeks ago I ended up > totally confused with the install process! I am sorry to hear. This time, please send a mail to the Linrad mailing list at the first point where something seems confusing. The Linrad install is extremely simple. Presumably you had problems with the setup.... > Can you give me a link to try again? Will it run on my Windows > 7 evaluation copy build 7100 (3Ghz Pentium 4) ? Or should I > use my old XP system (2 Ghz Celeron)? Both should be fine. As a newcomer you should start at a low bandwidth like 125 kHz and then both computers are fast enough:-) This is the starting page (for newcomers) http://www.sm5bsz. com/linuxdsp/ usage/newco/ newcomer. htm When you start Linrad for the first time, be careful to read everything that is written on screen before you press any key. Among the first screens there is one where you can press S for setup and N for "Newcomer mode." Choose N for newcomer mode. (If you choose S you will not get a chance to choose again because Linrad would not see you as a newcomer.) Please, do not experiment when you feel confused. I would appreciate very much if you could send a posting to the Linrad mailing list which you can find here: http://groups- beta.google. com/group/ linrad The mails from this list will not overload your mailbox. There is about one per day on the average. For me (as the author of it all) it is difficult to understand what could be confusing. Everything is simple and straight-forward. ...... Linrad is however different from conventional radio receivers. I actually never used one because I always have built my equipment myself so Linrad does not try to behave like an ICOM, Yeasu, or something else towards a user. Every time someone puts a question to the mailing list I try to understand what the problem is. It does not happen often because most potential users that find difficulties never inform me. (I think.) Once I understand what the problem is I try to make changes to Linrad to reduce the risk for others to encounter the same problem. I may also make changes to the newcomer page. Dear Chris, by sending a verbose question to the Linrad list explaining what you did and why to get into the point where something seems confusing you will help to make Linrad less confusing to others. That is for everyone on this list. Linrad will work for many different hardwares so most of you can give it a try. It will run under all versions of Windows from Win 98 and up. Also on 64 bit systems (to the extent that there are drive routines available for your hardware.) It will also work under all modern Linux distributions as well as most of the old ones. Your question(s) and answers to them will be archived by the list and available to others. I will also do my best to improve the information to reduce the risk that others get the same problem. 73 Leif / SM5BSZ > > 73, Chris ZL1BOE > > > > > --- In soft_ra...@yahoogro ups.com, Leif Asbrink <l...@...> wrote: > > > > Hi Chris, > > > > > > I do not understand the purpose of a phase indicator. > > > > > > It would be hard for me to explain properly with my limited > > > technical background but if you try the Sigmira program with the > > > phase display running on WWV you should see what I mean. > > I have uploaded a page with some high resolution waterfalls of WWV. > > It is pretty obvious what a phase indicator would have shown, but > > I think the waterfall is far more informative: -) > > http://www.sm5bsz. com/linuxdsp/ usage/cal10/ cal10.htm > > > > > I find after a bit of practice that I can visually distinguish > > > the average phase state from the often complex instantaneous > > > phase variations. I think this is because the Sigmira phase > > > display contains much more information - both short term > > > and longer term phase variations can be seen at the same time. > > Yes, and more so in the waterfall. > > > > > After using the Sigmira calibrate routine I can tune my SDR-IQ > > > to read WWV correct to within 1Hz on the frequency display. > > By feeding the frequency error (1.1 Hz at 10 MHz => 88Hz for the > > Perseus sampling frequency) into the program, the Linrad frequency > > scale would be correct within the uncertainty of the ionospheric > > propagation frequency shift. > > The frequency readout is in 0.1 Hz steps but you could easily > > read within 0.01 Hz from the frequency scale if you expand it a little. > > > > 73 > > > > Leif / SM5BSZ > > > > > > > ------------ --------- --------- ------ > > Yahoo! Groups Links > > >
