Re: [Flexradio] spam: SVN828
At 06:05 PM 1/16/2007, Bob Tracy wrote: You guys have to pardon the older generation. Back when the terminology change was made from cycles to Hertz it was common to use lower case for the multiplier. Some habits are hard to break. The prefixes aren't consistent anyway. h (hecto) and k (kilo) are lower case, M, G, T are uppercase. m is lower case, mu is lower case (and a different symbol set to boot), p and f are both lower case. Jim ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] What compter do I need?
I've watched a lot of talk about what people are running but they didn't give enough details to be useful for others. I have a modest system at best, Compaq EVO D310, Pentium(R) 4 cpu 2,4ghz with 760mb of ram, M-Audio D44 sound card. Audio buffer 512, DSP buffer 512 With Panadapter my cpu usage is 9.4 -28 With Histogram my cpu usage is 35 - 45 Only with Histogram do I ever detect and little audio dropout I almost always have the Panadapter display up, and I surf the internet, do email, and other things, while talking on a net, and only rarely do I have any audio dropout (and I mean milliseconds). I hope this is useful to some of you. The buffer size has a lot to do with it, 1024 is just fine also. I can't decide if I can detect the difference. Jerry ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] New DRM test transmissions
For the SDR DRM listeners.. French Guiana Special DRM transmissions from Montsinery wtih 150kw into a 4/4 antenna are now broadcasting: January 16 to 18 to Dallas, Texas on 21620kHz 1300 to 2020 UTC January 19 to 23 to Mexico City on 21260 kHz 1300 to 2020 UTC This morning TDF Montsinery (1500utc) being decoded with Dream with 20+dB SNR here in St Louis. Mel, K0PFX -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/91751121/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Notebook for FlexRadio?
Now that notebooks, in particular, are advertised with model/part numbers for the CPU rather than actual speeds, can somebody suggest what to look for in a current notebook that would work well with the SDR-1000 (or any other model that may appear in the near future)? I have no preference for either Intel or AMD. 73 Alan NV8A ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] What compter do I need?
I've watched a lot of talk about what people are running but they didn't give enough details to be useful for others. I have a modest system at best, Compaq EVO D310, Pentium(R) 4 cpu 2,4ghz with 760mb of ram, M-Audio D44 sound card. Audio buffer 512, DSP buffer 512 With Panadapter my cpu usage is 9.4 -28 With Histogram my cpu usage is 35 - 45 Only with Histogram do I ever detect and little audio dropout I have a 2.4 GHz Pentium 4 with 512 MB of RAm, Delta 44 and I run the buffers at max -- 512 (or 256, whichever was optimum when I set it) on the D44 side, and 2048 on the PowerSDR side of it. I often forget to turn off some sort of [EMAIL PROTECTED] like program, too, which I really shouldn't be running. When I really care about results, I remember to turn it off. I also do web surfing, run MixW (with its waterfall display, even when it is only being used for my on-line log) and perhaps a VNC session to my Linux box. As of circa 1.6.something, never mind the official 1.8.0, it hasn't mattered. Things are now sufficiently efficient that it manages to get its share of the cycles and run fine. Even with that low priority task in the background running. From a performance point of view, I have also managed to make a go of my wife's laptop, at about 1.5 GHz with a pitiful CPU cache (in other words, not just slow, but inadequate cache, which matters here). There, it runs the Creative Extigy USB sound card and there I don't allow anything else of consequence (except maybe MixW and a browser) to run concurrently. It runs reasonably well, if not perfectly, even at that. Also 512 MB. Since I do a lot of CW work, the PowerSDR side is still 2048, which maxes out the requirements I put on the CPU. I'd say anyone with a desktop or a laptop, even single CPU or single core CPU, that's above 2 GHz can make the thing run glitch free. If you do SSB only, you can back off on the PowerSDR side buffering a bit and free up some net CPU to help out. But, typically, I don't even need to do that. Our software gurus have tried, successfully in my view, to keep the computer minimums low enough for everyone's second computer to work. And, in fact, PowerSDR has overall gotten _more_ efficient over time. It just shouldn't be hard to get a computer that does the job for on the order of 300 dollars, used, these days. Larry WO0Z ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Notebook for FlexRadio?
I'd also like to find out. I took a look at the Flex Knowledge Base, but nothing seems to be listed there regarding recommended Notebook specs. Tnx! - Jeff, K6JCA --- Alan NV8A [EMAIL PROTECTED] wrote: Now that notebooks, in particular, are advertised with model/part numbers for the CPU rather than actual speeds, can somebody suggest what to look for in a current notebook that would work well with the SDR-1000 (or any other model that may appear in the near future)? I have no preference for either Intel or AMD. 73 Alan NV8A ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Notebook for FlexRadio?
Hi Alan Last week, I ordered a Toshiba Tecra S4-133. It will be there around next week. Intel® Core™ 2 Duo Processor T7200, 100GB (5400 RPM) Serial-ATA (SATA) hard disk drive, i.LINK(tm) IEEE-1394 USB v2.0 – 3 ports RJ-45 LAN port RJ-11 modem port Serial port Parallel port, etc... I do not know if this product is sold in USA. 73 José F5JD Alan NV8A a écrit : Now that notebooks, in particular, are advertised with model/part numbers for the CPU rather than actual speeds, can somebody suggest what to look for in a current notebook that would work well with the SDR-1000 (or any other model that may appear in the near future)? I have no preference for either Intel or AMD. 73 Alan NV8A ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Notebook for FlexRadio?
Who needs all that horsepower? I'm running an old 1 GHz Opteron Compaq laptop, 768M of memory. Runs fine. The important spec on this was the price: free, thrown in the trash by a friend who switched to Apple.I don't use it for anything but running the Flex. There are no extraneous software installs to hose my radio. If I were buying a new laptop (horrors) I would buy a MacBook dual core Intel. That way I could experience the joys of running MacOS most of the time and boot windows only to run the radio. Of course I'm wildly biased. Jon never worked for Apple but did start with UNIX in the 70's On Jan 17, 2007, at 8:08 AM, Jeff Anderson wrote: I'd also like to find out. I took a look at the Flex Knowledge Base, but nothing seems to be listed there regarding recommended Notebook specs. Tnx! - Jeff, K6JCA --- Alan NV8A [EMAIL PROTECTED] wrote: Now that notebooks, in particular, are advertised with model/part numbers for the CPU rather than actual speeds, can somebody suggest what to look for in a current notebook that would work well with the SDR-1000 (or any other model that may appear in the near future)? I have no preference for either Intel or AMD. 73 Alan NV8A ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Notebook for FlexRadio?
The QST reviews led me to believe that a considerable amount of horsepower *is* needed: they got the package that included a computer with a 2.4GHz Celeron and lamented that they did not get the one with a 2.8GHz P4. Alan NV8A On 01/17/07 11:58 am K6JEK wrote: Who needs all that horsepower? I'm running an old 1 GHz Opteron Compaq laptop, 768M of memory. Runs fine. The important spec on this was the price: free, thrown in the trash by a friend who switched to Apple.I don't use it for anything but running the Flex. There are no extraneous software installs to hose my radio. If I were buying a new laptop (horrors) I would buy a MacBook dual core Intel. That way I could experience the joys of running MacOS most of the time and boot windows only to run the radio. Of course I'm wildly biased. Jon never worked for Apple but did start with UNIX in the 70's I'd also like to find out. I took a look at the Flex Knowledge Base, but nothing seems to be listed there regarding recommended Notebook specs. Now that notebooks, in particular, are advertised with model/part numbers for the CPU rather than actual speeds, can somebody suggest what to look for in a current notebook that would work well with the SDR-1000 (or any other model that may appear in the near future)? I have no preference for either Intel or AMD. ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Notebook for FlexRadio?
I wonder why. With this old, free system, CPU usage reads in the 50's not in the single digits. But when I'm talking on the radio I don't need 90% of the CPU to do something else. This old laptop has a parallel port and a Firewire port, You'd be hard pressed to find one with a parallel port these days. The CPU is an Athlon, not an Opteron. The wrong AMD brand came out of my fingers.Maybe we should start a thread: my computer is worse than yours and it still runs the radio. Mike, W6THW, advised me to dedicate a computer to the Flex. When the fanciest computer in the house was the one connected to the Flex, he'd find his grand kids on it playing video games. After that he'd have to fight with it to get it to run the SDR-1000 software again. I don't have any grand kids but anyone who does should think about Mike's point. Good luck, Jon On Jan 17, 2007, at 9:17 AM, Alan NV8A wrote: The QST reviews led me to believe that a considerable amount of horsepower *is* needed: they got the package that included a computer with a 2.4GHz Celeron and lamented that they did not get the one with a 2.8GHz P4. Alan NV8A On 01/17/07 11:58 am K6JEK wrote: Who needs all that horsepower? I'm running an old 1 GHz Opteron Compaq laptop, 768M of memory. Runs fine. The important spec on this was the price: free, thrown in the trash by a friend who switched to Apple.I don't use it for anything but running the Flex. There are no extraneous software installs to hose my radio. If I were buying a new laptop (horrors) I would buy a MacBook dual core Intel. That way I could experience the joys of running MacOS most of the time and boot windows only to run the radio. Of course I'm wildly biased. Jon never worked for Apple but did start with UNIX in the 70's I'd also like to find out. I took a look at the Flex Knowledge Base, but nothing seems to be listed there regarding recommended Notebook specs. Now that notebooks, in particular, are advertised with model/part numbers for the CPU rather than actual speeds, can somebody suggest what to look for in a current notebook that would work well with the SDR-1000 (or any other model that may appear in the near future)? I have no preference for either Intel or AMD. ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] spam: SVN828
I wish you hadn't pointed out hecto and kilo. Otherwise, I'd thought the rule was that multipliers 1 were upper case and those 1 were lower case. So much for that idea. Chris - AE6VK Anybody else remember when moonbounce was on 1.024 kilomegacycles? -Original Message- From: Jim Lux [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 17, 2007 6:11 AM To: Bob Tracy; [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio Subject: Re: [Flexradio] spam: SVN828 At 06:05 PM 1/16/2007, Bob Tracy wrote: You guys have to pardon the older generation. Back when the terminology change was made from cycles to Hertz it was common to use lower case for the multiplier. Some habits are hard to break. The prefixes aren't consistent anyway. h (hecto) and k (kilo) are lower case, M, G, T are uppercase. m is lower case, mu is lower case (and a different symbol set to boot), p and f are both lower case. Jim ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Notebook for FlexRadio?
My initial development of the DSP core in PowerSDR happened on a 533 MHz Pentium running Linux. Running headless, that is -- a pure command line version, no graphics. It still runs fine on that same processor, which doesn't even have a graphics card in it at this point. It's the console and pretty pictures that take all the ticks. Part of the burden is the running spectrum and meter data, part of it is having a skillion widgets on the monolithic console showing all the time. The SDR processing per se is and will continue to be, basically, a fairly lightweight audio bandwidth application. These days that kind of processing can be tucked into the corner of a typical personal machine and not even be noticed most of the time. There's no reason why, if you had a way to manage them under Windows (you do under Linux), you couldn't be running 16 or 32 of them simultaneously on an average laptop. A modern music production program like ProTools or Ardour is *much* more demanding. 73 Frank AB2KT On 1/17/07, K6JEK [EMAIL PROTECTED] wrote: I wonder why. With this old, free system, CPU usage reads in the 50's not in the single digits. But when I'm talking on the radio I don't need 90% of the CPU to do something else... -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/ef530aaa/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] spam: SVN828
And n nano c centi d deci I must missing some ;-) age??? groeten Peter petervn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)gmail.com ; pa0pvn(a)amsat.org . Van: Jim Lux [mailto:[EMAIL PROTECTED] Verzonden: wo 17-1-2007 15:11 Aan: Bob Tracy; [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio Onderwerp: Re: [Flexradio] spam: SVN828 At 06:05 PM 1/16/2007, Bob Tracy wrote: You guys have to pardon the older generation. Back when the terminology change was made from cycles to Hertz it was common to use lower case for the multiplier. Some habits are hard to break. The prefixes aren't consistent anyway. h (hecto) and k (kilo) are lower case, M, G, T are uppercase. m is lower case, mu is lower case (and a different symbol set to boot), p and f are both lower case. Jim -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/67c7bae6/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] spam: SVN828
How about deca (da)? Groeten, Joe - Original Message - From: [EMAIL PROTECTED] To: Jim Lux [EMAIL PROTECTED]; Bob Tracy [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio FlexRadio@flex-radio.biz Sent: Wednesday, January 17, 2007 13:43 Subject: Re: [Flexradio] spam: SVN828 And n nano c centi d deci I must missing some ;-) age??? groeten Peter petervn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)gmail.com ; pa0pvn(a)amsat.org . Van: Jim Lux [mailto:[EMAIL PROTECTED] Verzonden: wo 17-1-2007 15:11 Aan: Bob Tracy; [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio Onderwerp: Re: [Flexradio] spam: SVN828 At 06:05 PM 1/16/2007, Bob Tracy wrote: You guys have to pardon the older generation. Back when the terminology change was made from cycles to Hertz it was common to use lower case for the multiplier. Some habits are hard to break. The prefixes aren't consistent anyway. h (hecto) and k (kilo) are lower case, M, G, T are uppercase. m is lower case, mu is lower case (and a different symbol set to boot), p and f are both lower case. Jim -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/67c7bae6/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] spam: SVN828
Try this list - http://www.essex1.com/people/speer/large.html So far, I've only seen Exa- through zepto- used in earnest. Chris - AE6VK -Original Message- From: Joe - AB1DO [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 17, 2007 10:57 AM To: FlexRadio Subject: Re: [Flexradio] spam: SVN828 How about deca (da)? Groeten, Joe - Original Message - From: [EMAIL PROTECTED] To: Jim Lux [EMAIL PROTECTED]; Bob Tracy [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio FlexRadio@flex-radio.biz Sent: Wednesday, January 17, 2007 13:43 Subject: Re: [Flexradio] spam: SVN828 And n nano c centi d deci I must missing some ;-) age??? groeten Peter petervn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)gmail.com ; pa0pvn(a)amsat.org . Van: Jim Lux [mailto:[EMAIL PROTECTED] Verzonden: wo 17-1-2007 15:11 Aan: Bob Tracy; [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio Onderwerp: Re: [Flexradio] spam: SVN828 At 06:05 PM 1/16/2007, Bob Tracy wrote: You guys have to pardon the older generation. Back when the terminology change was made from cycles to Hertz it was common to use lower case for the multiplier. Some habits are hard to break. The prefixes aren't consistent anyway. h (hecto) and k (kilo) are lower case, M, G, T are uppercase. m is lower case, mu is lower case (and a different symbol set to boot), p and f are both lower case. Jim -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachment s/20070117/67c7bae6/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] spam: SVN828
For those who speak french and for curious in general http://www.industrie.gouv.fr/metro/aquoisert/si.htm 73 José F5JD [EMAIL PROTECTED] a écrit : And n nano c centi d deci I must missing some ;-) age??? groeten Peter petervn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)hetnet.nl mailto:[EMAIL PROTECTED] ; pa0pvn(a)gmail.com ; pa0pvn(a)amsat.org . Van: Jim Lux [mailto:[EMAIL PROTECTED] Verzonden: wo 17-1-2007 15:11 Aan: Bob Tracy; [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio Onderwerp: Re: [Flexradio] spam: SVN828 At 06:05 PM 1/16/2007, Bob Tracy wrote: You guys have to pardon the older generation. Back when the terminology change was made from cycles to Hertz it was common to use lower case for the multiplier. Some habits are hard to break. The prefixes aren't consistent anyway. h (hecto) and k (kilo) are lower case, M, G, T are uppercase. m is lower case, mu is lower case (and a different symbol set to boot), p and f are both lower case. Jim -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/67c7bae6/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Frequency Calibration Problem
I have three versions of Power SDR available. They are PowerSDR 1.6.3 (with K6JCA mods), PowerSDR 1.8.0, and PowerSDR latest SVN. There are three groups of numbers below the panadapter. First is hz deviation of the frequency of the strongest signal in the filter passband. Second is that signal's strenght in dbm. Third is the frequency of the strongest signal in the filter passband. I start PowerSDR 1.6.3 and tune the receiver to WWV (15 mhz). Going to the setup/calibration tab, I put 15.000.000 in the Frequency calibration Window and hit calibrate. The main screen comes back and shows me [0.0 Hz -73dBm 15.000.000 Mhz]. This is what I would expect it to show. I start PowerSDR 1.8.0 and do the same thing. Now the display gives me [-20.2 Hz -73dBm 14.999.980 Mhz]. It appear to be telling me that WWV is 20 Hz low. The same is true of the latest SVN code. I have tried reloading the program. I did not import the database but started with a new database and fresh calibration each time. Each of the PowerSDR versions is in it's own directory with it's own database. I have checked the KB. I have checked the reflector and seem to find nothing on it so it seems to be only my problem. Any ideas??? --Larry W8ER ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] Frequency Calibration Problem
Thanks for the explanation Eric. I experience exactly the same thing. Norman -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/168e9ec8/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] OT: measuring power and frequency above 1GHz?
Considering the considerable talent on this list, I'm looking for thoughts on how to best measure frequency and power above 1GHz. Would like the ability to measure from very low levels (-20dBm) to above +50dBm. A calibrated signal source of some kind would be very handy also. What I'm trying to do is set up a series of transverters through at least 3456MHz. I understand power meters are available that measure fairly low levels with acceptable accuracy, and then use directional couplers and/or attenuators to reach higher levels. What type of instruments are recommended from the used market? Links to web sites that discuss this type of thing? 73, Army Curtis - AE5P Nacogdoches, the oldest town in Texas -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.13/632 - Release Date: 1/16/2007 4:36 PM ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
Re: [Flexradio] Frequency Calibration Problem
I encountered exactly this problem years ago when using a $50,000 high-end spectrum analyzer (at least it was back then - HP 8560 series) to automatically characterize a wideband free-running VCO's tuning range, tuning slope, harmonics, etc. across its entire tuning range (before the days of the fancy VCO testers and signal source analyzers). The specan has a limited number of display points, and the wider the span and resolution bandwidth (RBW) got, the less accurate the frequency readings were (the 8560 series has a real built-in freq counter). The trick was to start with a 100 MHz span centered near the expected tune freq and a mid-range resolution bandwidth (1 MHz or so) to get a fast sweep, peak search to find the center of the hump, marker to center freq, narrow the span and RBW, repeat the peak search centering routine, then keep narrowing and centering until the span was as narrow as a 1 Hz RBW would let me go. With the final peak in the display center, and the marker set on top, the 8560's counter was used to accurately read the frequency. This became the reference point for all the other measurements. Takes forever, but it was accurate. Why didn't I just use a stand-alone counter to make it go faster? Well, I had to do all that stuff to set the fundamental freq marker accurately in order to measure all the other parameters, anyway. This technique could be used in PowerSDR to improve frequency calibration accuracy, although I suspect it might be a wee bit faster than what I had to do since our calibration frequency is known and we shouldn't be that far off to start with. The limitation with the SDR-1000 will be LO cleanliness and stability. It's hard to use a 1Hz or 10Hz RBW with a slightly rough LO (spurs and temperature stability). 73, Dan KB5MY/6 DM13nc It's definitely not just your problem. The display code changed in the latest versions to enable the zoom/pan features that came along with the wider display. Because of this, we have to use a more flexible manner of converting a pixel on the display to a frequency. Unfortunately the resolution of these pixels is very poor. Consider that when running 96kHz on the 1x zoom, the display is showing 40kHz of data. This data is spread over 704 pixels. This means that each pixel represents 40,000 / 704 = 56Hz. What this means is that the accuracy of those frequency readouts is only going to be ~56Hz in that setting. It gets worse when you go to 192kHz and zoom out further than 1x. The long and short of it is that this needs to be reworked in the code to be calculated more accurately. I'm not sure how we will do this, but I'm sure we can improve on the current situation. Eric Wachsmann FlexRadio Systems -Original Message- From: Larry W8ER [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 17, 2007 2:20 PM To: FlexRadio - Eric; flexradio@flex-radio.biz Subject: Frequency Calibration Problem I have three versions of Power SDR available. They are PowerSDR 1.6.3 (with K6JCA mods), PowerSDR 1.8.0, and PowerSDR latest SVN. There are three groups of numbers below the panadapter. First is hz deviation of the frequency of the strongest signal in the filter passband. Second is that signal's strenght in dbm. Third is the frequency of the strongest signal in the filter passband. I start PowerSDR 1.6.3 and tune the receiver to WWV (15 mhz). Going to the setup/calibration tab, I put 15.000.000 in the Frequency calibration Window and hit calibrate. The main screen comes back and shows me [0.0 Hz -73dBm 15.000.000 Mhz]. This is what I would expect it to show. I start PowerSDR 1.8.0 and do the same thing. Now the display gives me [-20.2 Hz -73dBm 14.999.980 Mhz]. It appear to be telling me that WWV is 20 Hz low. The same is true of the latest SVN code. I have tried reloading the program. I did not import the database but started with a new database and fresh calibration each time. Each of the PowerSDR versions is in it's own directory with it's own database. I have checked the KB. I have checked the reflector and seem to find nothing on it so it seems to be only my problem. Any ideas??? --Larry W8ER ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
[Flexradio] DRM North America yahoo group
A group was recently formed for those interested in DRM transmissions/software/radios/etc called DRMNA (DRM North America). K6FIB is moderator. See http://groups.yahoo.com/group/drmna/ for more info. Mel, K0PFX -- next part -- An HTML attachment was scrubbed... URL: http://mail.flex-radio.biz/pipermail/flexradio_flex-radio.biz/attachments/20070117/27943001/attachment.html ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
