[digitalradio] Re: OFDM data is Emission Designator D1D
OFDM squeezes more carriers into the same space by making the carriers orthogonal to their next door neighbors. Its not only the next door neighbors but ALL the carriers. If you look at the the ofdm signal with a correctly timed FFT with exactly a symbol time length, there is NO overlap of the carriers. That is how domodualtion is done. But if you look at the the ofdm signal with an fft of incorrect length, or not proprly timed (including phase-change symbol boundaries) the carriers will overlap quite a bit ! Your waterfall display is such a randomly timed fft of incorrect lenght. The advantage of this system ? each subcarrier can change it's phase (and amplitude) much faster than a carrier of limited bandwidth could do, but during symbol integration time there is no carrier overlap, the orthogonality remains perfect. One example of a bandwidth limited subcarrier system is RDFT. in contrast OFDM does NOT limit the subcarrier bandwidth !
Re: [digitalradio] New Year Digital Contest: IDEAS ???
Nope - Ill be over on the original digital mode, STRAIGHT KEY NIGHT. Too many contests at the same time detract from each other. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB all DX 2-6 years each . QSL LOTW-buro- direct As courtesty I upload to eQSL but if you use that - also pls upload to LOTW or hard card. moderator [EMAIL PROTECTED] - Original Message - From: Andrew O'Brien [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Sent: Friday, November 24, 2006 12:56 PM Subject: [digitalradio] New Year Digital Contest: IDEAS ??? Any interest in a digital contest held on New Year's Day? Here's the idea Stations work as many other stations as possible. Exchange is your LOCAL TIME , local date. and name of your local time zone. Points 10 points for any QSO ivolving two years (one station is in 2006 and the otehr station is in 2007, local date). 2 points per QSO between stations in the same year. For a QSO to be valid , the local date must be either 31/12/06 or 1/1/07. Modes: PSK63, MFSK16, Olivia, Domino Ex. Or maybe just one mode? Please takes the above idea and critique it, input welcome. Will refine after feedback is received Andy K3UK. Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.14.16/552 - Release Date: 11/26/2006 11:30 AM
Re: [digitalradio] MFSK beacon
Most do not use the mode. Some of us do, and noted what you said, but had no comment. If we see/read the beacon , we will let you know. Not responding to an email doesnt mean one has no interest. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB all DX 2-6 years each . QSL LOTW-buro- direct As courtesty I upload to eQSL but if you use that - also pls upload to LOTW or hard card. moderator [EMAIL PROTECTED] - Original Message - From: Alves [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Sent: Thursday, November 23, 2006 1:52 AM Subject: [digitalradio] MFSK beacon Well, I'm getting out of this list, nobody seems to be interested by my experiments. Ciao, F4EOB. Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.14.16/552 - Release Date: 11/26/2006 11:30 AM
[digitalradio] Dmitry have released a new version of RFSM2400
Hi, You can download the latest the software from my web side http://home.broadpark.no/~saanes/rfsm2400_v041.zip I have tried to decode the Russian language with Babel Fish, but I am not sure what's different from the previous version. Perhaps some of you who have English as first language have more luck. From the Russian web side: -- Dmirty: Date: 26 noys 2006 19:50:06 # quotation Mesh Code-300 let will break off with the quality of demodulation;) Pover'te, this is more main than the permissible detunings, which can be corrected moreover. I personally consider what to better calibrate and to advance 1 time sonic how to worsen for this demodulator. Where to model corrector let us X-ray with the diagram, but not now, but tomorrow, after conferring with the collective reason IDE Group (so that the know-how, you do not give god, not to give out;) Now here reworked the algorithm of modulation, reduced calculations and like raised the quality of the signal put out. I will flood - I will report. http://home.broadpark.no/%7Esaanes/rfsm2400_v04.zip 73 de LA5VNA Steinar
[digitalradio] CPU performance ?
I'm out of the loop on the latest in CPU performance. I'm looking at a three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+ ( 1 Gig of RAM , no monitor for $389), and one more ...the Intel® Pentium® 4 HT 524 (no monitor , 512 Megs RAM) for $410. I wonder if people here would comment on these CPU's for digital modes and the usual multi-tasking that hams do? I tend to run a logging program, a couple of digital mode applications (like Multipsk and MixW),Internet Explorer, email, all at the same time. Andy K3UK
[digitalradio] New multimode program for Linux
I would like to announce that I have posted fldigi, release 1.01. This release consists of GPL source code written in C++ and uses the Fast Light Toolkit gui support libraries. There is also a pre-compiled binary that is known to operate on several Linux distros including the Ubuntu derivatives. You can find the posting at http://www.w1hkj.com 73, Dave, W1HKJ
Re: [digitalradio] CPU performance ?
Andrew, I dont know the speed of these cpus. But, I am using 2.2 gig cpu in both my machines here that I built. They will run circles. I have the whole DXLab suite running, along with my email, and run two or three screens of IE and Firefox, etc. with no problems whatsoever. It is the memory that you really need to think about upgrading more than cpu, these days. I have 512(two 256 chips) and the machines have had NO problems doing whatever I ask them to do. I also have a mother board with three different video outputs, SVGA, DVI -Digital, and TV outputs (only two can be used at a time) I would not purchase or build any machine today that could not handle at least two video monitors at a time. Its great having a 19 inch and a 17 inch screen setting here side by side. I am even thinking about putting another video card in two handle at least one more. Many of the cheaper machines just have one video output, so watch for that. ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB all DX 2-6 years each . QSL LOTW-buro- direct As courtesty I upload to eQSL but if you use that - also pls upload to LOTW or hard card. moderator [EMAIL PROTECTED] - Original Message - From: Andrew O'Brien [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Sent: Sunday, November 26, 2006 4:21 PM Subject: [digitalradio] CPU performance ? I'm out of the loop on the latest in CPU performance. I'm looking at a three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+ ( 1 Gig of RAM , no monitor for $389), and one more ...the Intel® Pentium® 4 HT 524 (no monitor , 512 Megs RAM) for $410. I wonder if people here would comment on these CPU's for digital modes and the usual multi-tasking that hams do? I tend to run a logging program, a couple of digital mode applications (like Multipsk and MixW),Internet Explorer, email, all at the same time. Andy K3UK Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.14.16/552 - Release Date: 11/26/2006 11:30 AM
Re: [digitalradio] New multimode program for Linux
I am at that point that I could switch, even if I have to give up some of the software that I prefer, since I have retired and do not absolutely have to have certain Windows only software that I used to require in my business. Years ago I had a Linux dual boot and managed to correct my MBR and did not know what to do to get back to Windows, however, now I think I can repair that if it happens again so that would be an alternative. Are there any hams who have recently completely switched over to Linux? If so, can you comment on the pros and cons of your experience? Are there any good discussion groups that cover this topic? Has anyone had any success yet with the XP version of Win4Lin and running the serial ports? This seems to be the only stumbling block. 73, Rick, KV9U David Freese wrote: I would like to announce that I have posted fldigi, release 1.01. This release consists of GPL source code written in C++ and uses the Fast Light Toolkit gui support libraries. There is also a pre-compiled binary that is known to operate on several Linux distros including the Ubuntu derivatives. You can find the posting at http://www.w1hkj.com 73, Dave, W1HKJ
Re: [digitalradio] New multimode program for Linux
I too would like to find out the answers to Ricks Questionnaire. Pleas CC me any responses to his e-mail, thanks ! Paul Metzger KQ6EH --- On Nov 26, 2006, at 13:47, KV9U wrote: I am at that point that I could switch, even if I have to give up some of the software that I prefer, since I have retired and do not absolutely have to have certain Windows only software that I used to require in my business. Years ago I had a Linux dual boot and managed to correct my MBR and did not know what to do to get back to Windows, however, now I think I can repair that if it happens again so that would be an alternative. Are there any hams who have recently completely switched over to Linux? If so, can you comment on the pros and cons of your experience? Are there any good discussion groups that cover this topic? Has anyone had any success yet with the XP version of Win4Lin and running the serial ports? This seems to be the only stumbling block. 73, Rick, KV9U David Freese wrote: I would like to announce that I have posted fldigi, release 1.01. This release consists of GPL source code written in C++ and uses the Fast Light Toolkit gui support libraries. There is also a pre-compiled binary that is known to operate on several Linux distros including the Ubuntu derivatives. You can find the posting at http://www.w1hkj.com 73, Dave, W1HKJ Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links
Re: [digitalradio] CPU performance ?
Unless you are doing FlexRadio SDR I wouldn't worry about CPU speed, especially among these choices. 512m may be a bit small, especially if you don't plan to upgrade, so the middle choice seems like the best deal. In any case, I would price them all at 1GB or 2GB and buy compare at that level. Leigh/WA5ZNU On Sun, 26 Nov 2006 1:28 pm, Andrew O'Brien wrote: I'm out of the loop on the latest in CPU performance. I'm looking at a three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+ ( 1 Gig of RAM , no monitor for $389), and one more ...the Intel® Pentium® 4 HT 524 (no monitor , 512 Megs RAM) for $410. I wonder if people here would comment on these CPU's for digital modes and the usual multi-tasking that hams do? I tend to run a logging program, a couple of digital mode applications (like Multipsk and MixW),Internet Explorer, email, all at the same time. Andy K3UK Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links http://docs.yahoo.com/info/terms/
Re: [digitalradio] New multimode program for Linux
KV9U wrote: I am at that point that I could switch, even if I have to give up some of the software that I prefer, since I have retired and do not absolutely have to have certain Windows only software that I used to require in my business. Years ago I had a Linux dual boot and managed to correct my MBR and did not know what to do to get back to Windows, however, now I think I can repair that if it happens again so that would be an alternative. Are there any hams who have recently completely switched over to Linux? If so, can you comment on the pros and cons of your experience? Are there any good discussion groups that cover this topic? Has anyone had any success yet with the XP version of Win4Lin and running the serial ports? This seems to be the only stumbling block. 73, Rick, KV9U I am running Puppy Linux, v2.12 just released. I have just begun experimenta with WINE and MS Win apps, so far pretty good performance. I have run a Windows programming app through the USB port and a USB-Serial adapter with some success. Puppy can be run off a CD, CD-RW (if you want to save files to the CD), a USB memory stick, and I believe a CF or SD card. It never has to write anything to the HDD. I have had Puppy running dual-boot with Win98 with no problems. I just don't like MS on any machine it does not have to be on since it is so buggy and so vulnerable. -- Thanks! 73, doc, KD4E ... somewhere in FL URL: bibleseven (dot) com
Re: [digitalradio] New multimode program for Linux
Instead of switching Why not get a second computer and try it? You can use a cheap IOGear video switch, or use VNC and operate it from your Windows box (or vice versa). An 800MHz P3 or up ought to give you a pleasant enough experience. I used to recommend RedHat, but Fedora seems to have gone downhill in quality. Ubuntu seems to go smoothly these days. 73, Leigh/WA5ZNU
[digitalradio] Re: New multimode program for Linux
Rick, The Linux distros that are out have a tool for dual boot and is pretty easy to set up. Two Yahoo groups one being Dave's W1HKJ: http://groups.yahoo.com/group/linuxham/ And: http://groups.yahoo.com/group/linuxhams/ If you have a IRC client like MIRC or there are some on the Linux software that you install. Then use the Freenode server and #hamradio room, is a good place to have Linux questions related to ham radio answered. HTH, Jerry - K0HZI --- In digitalradio@yahoogroups.com, KV9U [EMAIL PROTECTED] wrote: I am at that point that I could switch, even if I have to give up some of the software that I prefer, since I have retired and do not absolutely have to have certain Windows only software that I used to require in my business. Years ago I had a Linux dual boot and managed to correct my MBR and did not know what to do to get back to Windows, however, now I think I can repair that if it happens again so that would be an alternative. Are there any hams who have recently completely switched over to Linux? If so, can you comment on the pros and cons of your experience? Are there any good discussion groups that cover this topic? Has anyone had any success yet with the XP version of Win4Lin and running the serial ports? This seems to be the only stumbling block. 73, Rick, KV9U David Freese wrote: I would like to announce that I have posted fldigi, release 1.01. This release consists of GPL source code written in C++ and uses the Fast Light Toolkit gui support libraries. There is also a pre-compiled binary that is known to operate on several Linux distros including the Ubuntu derivatives. You can find the posting at http://www.w1hkj.com 73, Dave, W1HKJ
Re: [digitalradio] CPU performance ?
As a former electronics/computer guy, I have found it difficult to follow the Intel marketing anymore and they really don't seem to want you to compare their chips too directly so they have these relative value numbering scheme. AMD seems more straightforward with an equivalent overall speed label. To help me understand things a bit better I recommend you consider the Wikipedia chart at: http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors This also will give you URL's to other tables including AMD. The units you mentioned are really pretty good for the low end though. All things being equal, it seems you often can expect to get the AMD for $100 or so less than comparable power for Intel. The AMD 64 X-2 3800+ is actually a fairly higher end product. The P4 HyperThreading 524 is pretty decent speed but I believe this is a 533 Front Side Bus. If I was going to buy a new machine today, I would opt for an AMD 64 X2 in the 4200+ range and with at least 1 but, probably 2 gig. Then again, after Christmas, and after Vista, who knows what will happen to the market:) A lot of Vista Ready machines might not work all that well with Vista, assuming you wanted to actually spend that much money a few months before it was practically free with a new computer. Of the three below, I would pick the AMD 64 X2 assuming they have similar HD's and DVD burners. We are at that point that at least one Gig of RAM is something you will want if there is not much of a price premium. 73, Rick, KV9U Andrew O'Brien wrote: I'm out of the loop on the latest in CPU performance. I'm looking at a three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+ ( 1 Gig of RAM , no monitor for $389), and one more ...the Intel® Pentium® 4 HT 524 (no monitor , 512 Megs RAM) for $410. I wonder if people here would comment on these CPU's for digital modes and the usual multi-tasking that hams do? I tend to run a logging program, a couple of digital mode applications (like Multipsk and MixW),Internet Explorer, email, all at the same time. Andy K3UK Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links
Re: [digitalradio] New multimode program for Linux
One more note re. Puppy. The originator of Puppy is active on the support forum as are all of the developers. They are an exceptionally helpful bunch of guys, much like most Hams. I am certain that they would love to assist with efforts to bring Ham digi apps up to speed. They have answered many of my questions but I am not enough of a programming guy to really make things happen -- I am better at testing them until I break them! -- Thanks! 73, doc, KD4E ... somewhere in FL URL: bibleseven (dot) com
Re: [digitalradio] CPU performance ?
Speaking of monitors I just bought the 22 widescreen Samsung Synchmaster 225BW. This is a moderate cost (U$400) LCD monitor with reasonably good parameters, although not considered a high end color corrected type. I was somewhat nervous whether I would like it and whether I would be able to tolerate what I assumed would be the small characters in its native mode. Well, I have had it a week now and find the native mode to be very sharp as promised (other modes unusable compared with the ease of switching a CRT monitor), and the size is OK because of the large screen size. Yes, it does have issues with scrolling jerkiness and brightness shifts unlike a CRT, but it is something you have to accept. My vision is not so very good, and I almost have to wear special bifocals for using the computer that only have reading and computer distance in order to have large enough viewing in my restricted focus range. Having multiple monitors would be very difficult for me to handle as I would need to have some up high and as you age, your range of focus for a specific focal distance keeps getting more and more limited so that I only have a few inches either side of which things go out of focus:( So one monitor right in front of me is the most comfortable. If I use my regular glasses, which are trifocals, I have a limited range computer section and I have to tilt my head up to use that range (same with progressive lenses) and can not do this for very long due to severe arthritis in my neck. (Getting over 60 does have its downsides). Because of the increased real estate of the widescreen monitor, I am able to have multiple windows open, such as using Multipsk with DXLab Commander and DXKeeper Logging and some e-mail and maybe a web page. Some overlap of course, but enormously more manageable than with my 19 Gateway CRT that I have had for many years. I am donating the CRT to a senior citizens center where I volunteer to teach some classes in basic computer use. We have a 15 monitor that even I have trouble using as it is not only small fonts, but is not very sharp either. I suspect that there will be some surprised residents this coming week:) Some of my students are around age 90 so it is even more difficult for them. Initially, I thought the real reason for buying the wide screen was for DVD movies:) The quality of DVD's is fairly low compared to what I am used to with off air HDTV. Up close with a 22 widescreen is not the best since you see every imperfection and there are issues with LCD's with moving images and moire patterns, even with a 5 msec response time. But being so very much larger, it is amplifying any imperfection. Some day we will have the HD DVD/Blu Ray and maybe even 1920p or whatever:) But the other huge advantage that I never thought of with the widescreen, is that now I can bring two documents on the screen for comparison and transfer of information. I do this a lot with extracting data from a document and making a table on the other document, comparing two similar docs for their differences (like the ARRL hamband changes), etc. I wish I had this when I was still working with my consulting business. Would have been very nice. But better late than never:) 73, Rick, KV9U Danny Douglas wrote: Andrew, I dont know the speed of these cpus. But, I am using 2.2 gig cpu in both my machines here that I built. They will run circles. I have the whole DXLab suite running, along with my email, and run two or three screens of IE and Firefox, etc. with no problems whatsoever. It is the memory that you really need to think about upgrading more than cpu, these days. I have 512(two 256 chips) and the machines have had NO problems doing whatever I ask them to do. I also have a mother board with three different video outputs, SVGA, DVI -Digital, and TV outputs (only two can be used at a time) I would not purchase or build any machine today that could not handle at least two video monitors at a time. Its great having a 19 inch and a 17 inch screen setting here side by side. I am even thinking about putting another video card in two handle at least one more. Many of the cheaper machines just have one video output, so watch for that.
[digitalradio] Re: CPU performance ?
There are many versions of the AMD 64 3200+, ranging in clock speed from 2 to 2.2 GHz. All have 128 kb of level-1 cache; some have 512 kb of level-2 cache, and some have 1 mb. All versions of the AMD 64 X2 Dual-core 3800+ clock are specified as 2 GHz, with 128 kb of level-1 cache and 512 kb of level-2 cache. The package contains two processors. The P4 HT 524 is not listed in Intel's P4 web page http://www.intel.com/products/processor_number/index_view_p4.htm but looking at the specs of its closest neighbors, its clock rate is probably 2.8 to 3 GHz, and its level-2 cache is probably 1 mb. Besides CPU clock rate, cache configuration, and bus speed, RAM size and hard drive speed (track-to-track seek time) are important performance parameters. All of the systems you're considering will likely yield adequate performance for IE, Outlook, and a couple of digital mode apps. The AMD 64 X2 Dual-core 3800+ will give you a 10-20% performance boost over an equivalent uniprocessor; only apps designed to exploit dual processors, e.g. Photoshop, get more than that. While 512 mb is enough to run XP, you'll almost certainly want to upgrade to 1 gb or more. What are the RAM upgrade limits of these three systems? I wouldn't buy a system limited to 1 gb; adding RAM is the cheapest performance upgrade, and you want that option when you need it. Unless you're also planning to use the machine for digital photography or videography, disk capacity is unlikely to be an issue; anything north of 40 gb should be fine. Do be sure that the system can accomodate a second internal hard drive, though, in case your needs change and you want to add capacity and/or redundancy. If you're running more apps than fit simultaneously in RAM, then you don't want a slow hard drive. Compare the track-to-track seek times of the drives in the systems you're considering with the data available from http://www.storagereview.com/comparison.html If you have additional questions, fire away Andy. 73, Dave, AA6YQ --- In digitalradio@yahoogroups.com, Andrew O'Brien [EMAIL PROTECTED] wrote: I'm out of the loop on the latest in CPU performance. I'm looking at a three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+ ( 1 Gig of RAM , no monitor for $389), and one more ...the Intel® Pentium® 4 HT 524 (no monitor , 512 Megs RAM) for $410. I wonder if people here would comment on these CPU's for digital modes and the usual multi-tasking that hams do? I tend to run a logging program, a couple of digital mode applications (like Multipsk and MixW),Internet Explorer, email, all at the same time. Andy K3UK
Re: [digitalradio] CPU performance ?
I purchased two 32 inch screens to place in compressed video classrooms a year or so back. These were small rooms with onlyi about 12-15 viewers at any given time, and I was not real happy with the results, from the back of the room - even just showing the in-room computer desktops. So- the next three I ordered were the 42 inch screens. These give me or the instructors the capability of viewing both our own classroom, and the opposite classroom (at the other end of the circuit) at the same time- and still be able to read the computer desktop signals from either room.They certainly are not like having a purpose built monitor right in front of you, but acceptable for students tol view what is going on. They are able to use their own desk top machines which can be switched onto the larger screens so that others in both their classroom, and at the other campus, to see what they are doing and talking about. Prior to the purchase of these, I used video projectors which can throw a very large image on the wall, but actually with less color and acceptance by the students, at the back of the room. Prior to my arrival at the college, they were using lare and old portable projectors which were noisy and dim. The new projectors in the larger classrooms, and the monitor screens in the smaller rooms were well accepted, and the white boards (Smart Board brand) used to project on, in the computer and math/science rooms proved to be an outstanding buy. You can buy a white board whein you place the projector either in front or behind the screens, and the board becomes a touch screen. Would be great to have one here in the ham shack, but the price of the projector would be minimum of 1 K, and the board another K. Bit pricey for a monitor replacement for me. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB all DX 2-6 years each . QSL LOTW-buro- direct As courtesty I upload to eQSL but if you use that - also pls upload to LOTW or hard card. moderator [EMAIL PROTECTED] - Original Message - From: KV9U [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Sent: Sunday, November 26, 2006 5:36 PM Subject: Re: [digitalradio] CPU performance ? Speaking of monitors I just bought the 22 widescreen Samsung Synchmaster 225BW. This is a moderate cost (U$400) LCD monitor with reasonably good parameters, although not considered a high end color corrected type. I was somewhat nervous whether I would like it and whether I would be able to tolerate what I assumed would be the small characters in its native mode. Well, I have had it a week now and find the native mode to be very sharp as promised (other modes unusable compared with the ease of switching a CRT monitor), and the size is OK because of the large screen size. Yes, it does have issues with scrolling jerkiness and brightness shifts unlike a CRT, but it is something you have to accept. My vision is not so very good, and I almost have to wear special bifocals for using the computer that only have reading and computer distance in order to have large enough viewing in my restricted focus range. Having multiple monitors would be very difficult for me to handle as I would need to have some up high and as you age, your range of focus for a specific focal distance keeps getting more and more limited so that I only have a few inches either side of which things go out of focus:( So one monitor right in front of me is the most comfortable. If I use my regular glasses, which are trifocals, I have a limited range computer section and I have to tilt my head up to use that range (same with progressive lenses) and can not do this for very long due to severe arthritis in my neck. (Getting over 60 does have its downsides). Because of the increased real estate of the widescreen monitor, I am able to have multiple windows open, such as using Multipsk with DXLab Commander and DXKeeper Logging and some e-mail and maybe a web page. Some overlap of course, but enormously more manageable than with my 19 Gateway CRT that I have had for many years. I am donating the CRT to a senior citizens center where I volunteer to teach some classes in basic computer use. We have a 15 monitor that even I have trouble using as it is not only small fonts, but is not very sharp either. I suspect that there will be some surprised residents this coming week:) Some of my students are around age 90 so it is even more difficult for them. Initially, I thought the real reason for buying the wide screen was for DVD movies:) The quality of DVD's is fairly low compared to what I am used to with off air HDTV. Up close with a 22 widescreen is not the best since you see every imperfection and there are issues with LCD's with moving images and moire patterns, even with a 5 msec response time. But being so very much larger, it is amplifying any imperfection. Some day we will have the HD DVD/Blu Ray and maybe even 1920p or
Re: [digitalradio] New multimode program for Linux
The modes Supports the following digital modes: CW DominoEX 4 DominoEX 5 DominoEX 8 DominoEX 11 DominoEX 16 DominoEX 22 Feld-Hell FSK-Hell FSK-Hell 105 MFSK-8 MFSK-16 MFSK-16 pix PSK-31 QPSK-31 PSK-63 QPSK-63 PSK-125 QPSK-125 OLIVIA various tones and bandwidth RTTY various Baud Rates, Shifts, Nbr of data bits, etc. Throb-1 Throb-2 Throb-4 ThrobX-1 ThrobX-2 ThrobX-4 WWV Receive only - calibrate your sound card to WWV Freq Analysis Receive only - be ready for the (next) ARRL FMT (freq meas test).
[digitalradio] Cant get two sound cards
Hello Group I wish to have the use of two sound cards,one for digital and the other for less important uses, ie. win sounds. Installing my Creative Live card is perfectly normal and successful, but the onboard card is not present any more, I have checked in Device manager, and only the Creative is present. If I remove the Creative Live card and reboot the onboard card is found and installed. At this stage I cannot get both cards to be present at the same time. I have tried disabling the creative via Device Manager, and rebooting to no avail. I know there are a lot of Hams using 2 cards. How is this done? Kevin VK5OA
Re: [digitalradio] CPU performance ?
Those were not LCDs but plasmas at about 6 k two years ago, and about 2,500 a year ago. At the same time, LCDs were available only at a smaller size, and were running about 6-12K two years ago, and have come down considerably since then. I would NOT go with a Plasma screen at all today, even though they got down fairly low in prices. LCD prices continue to plunge. Now - none of these were TV sets, but just Monitors, to which I added the projector, a computer and even a DVD/CD as input devices. I saw a 32 inch at Walmart last week, running about 1200 bucks, and that with the tuner built in. The most value for the buck were the projectors at around 1200 and add a white board at another 1200 and we had a nice 50 inch touch screen . Smart Corp even makes an overlay which you can place right on top of a flat screen such as we had in the compressed video rooms so you can use an LCD monitor, with a touch screen which can be transmitted to the second (or more) classrooms. You just cant keep up with the available techonology today. Now, smart has a small 14 or 16 inch desktop screen that sits on the instructors desk. Its a touch type screen, that then transmits the signal up to the projector which then shows on the large projection screen. Gives him or her the capability to print/write on the touch screen and have all the students view it in live-time. They have another program that is usded in conjunction with their view screens wherin an instructor can switch back and forth, and show even 4 or 6 of the students monitor screens to everyone else. He can lock out the keyboards so the students have to pay attention to him, instead of messing with their own computer, share bits of programs among the students, etc. Smart.com is a good web site to look at that stuff. There are several companies now providing such, but I tend to stay with one brand per campus/college. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB all DX 2-6 years each . QSL LOTW-buro- direct As courtesty I upload to eQSL but if you use that - also pls upload to LOTW or hard card. moderator [EMAIL PROTECTED] - Original Message - From: kd4e [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Sent: Sunday, November 26, 2006 6:14 PM Subject: Re: [digitalradio] CPU performance ? Danny Douglas wrote: ... snip! ... I purchased three 42 inch screens ... snip! snip! ... the price of the projector would be minimum of 1 K, and the board another K. Bit pricey for a monitor replacement for me. What is the price of a 42 LCD, please? -- Thanks! 73, doc, KD4E ... somewhere in FL URL: bibleseven (dot) com Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.14.16/552 - Release Date: 11/26/2006 11:30 AM
Re: [digitalradio] New Year Digital Contest: IDEAS ???
Any interest in a digital contest held on New Year's Day? Here's the idea We are already hip-deep in contests, several on New Year's Day. de Roger W6VZV
[digitalradio] Fast HF Modem Development Re: OFDM data D1D
The advantage of this system ? each subcarrier can change it's phase (and amplitude) much faster than a carrier of limited bandwidth could do, but during symbol integration time there is no carrier overlap, the orthogonality remains perfect. Yes, that is certainly the forte of OFDM, and indeed most OFDM systems use amplitude and phase simultaneously to pack more symbols into the time/frequency space. fred harris, aka Mr. DSP, once told me that a really good signal fills up the channel and looks like white noise, or words to that effect. Some have mentioned that other phase modulated systems are orthogonal, so why not call them OFDM also? but generally speaking, they are called DPSK or DQPSK, or whatever, to be more descriptive... even though they may be orthogonal. The OFDM flavors with many amplitude levels in the symbols that are used in UHF/microwave are probably not so good for HF work close to the noise floor. But a dynamically variable OFDM signal with variable amplitude levels that changes according to SN could take advantage of when propagation is good. It could revert to a single amplitude level, (making it -PSK), to wring every dB out when the SN is worse. I foresee and recommend this variable OFDM symbol approach as the best next step in fast HF modems for hams. Bonnie VR2/KQ6XA
[digitalradio] Re: New multimode program for Linux
When my windows pc's hard disk died about 1 1/2 yrs ago, I decided not to replace it. I upgraded my linux box to suse 9.3 and haven't looked back. Open Office does everything I need in place of microsoft office. You'll need to become comfortable with tar, ./configure, make, and 'make install'. You don't have to worry about viruses. kmail and mozilla work fine. I had to locate and download the latest xine package to get my ipod shuffle to work since suse's updates didn't handle mp3's at all. It also fixed some problems with wmf files. Now my ipod is recognized automatically and gtkpod works ok. Some ham software is windows only but so is some linux software. Only you can answer which you software you need, therefore determining the operating system. Will I go back to windows? I doubt it. Jim WA0LYK --- In digitalradio@yahoogroups.com, KV9U [EMAIL PROTECTED] wrote: I am at that point that I could switch, even if I have to give up some of the software that I prefer, since I have retired and do not absolutely have to have certain Windows only software that I used to require in my business. Years ago I had a Linux dual boot and managed to correct my MBR and did not know what to do to get back to Windows, however, now I think I can repair that if it happens again so that would be an alternative. Are there any hams who have recently completely switched over to Linux? If so, can you comment on the pros and cons of your experience? Are there any good discussion groups that cover this topic? Has anyone had any success yet with the XP version of Win4Lin and running the serial ports? This seems to be the only stumbling block. 73, Rick, KV9U
Re: [digitalradio] Re: New multimode program for Linux
You'll need to become comfortable with tar, ./configure, make, and 'make install'. If you go with Puppy they have implemented a Puppy Package Manager that automates the load process from apps set up for Puppy (the friendly folks there will create a Puppy-compatible version of most apps on request) ... they are even adding a Debian import feature to enable apps set up for Debian to be automatically loaded. They have really made it user friendly. I had used SuSE but it got too bloated. Puppy is a complete operating system with suite of GUI apps, and is only about 50 - 80M and boots directly off the CDROM! Sorry to sound as though I am evangelizing for Puppy but it is a real natural for Hams using older PC's and laptops. -- Thanks! 73, doc, KD4E ... somewhere in FL URL: bibleseven (dot) com
Re: [digitalradio] Re: OFDM data is Emission Designator D1D
I'm aware of the definition of orthogonality. The document originally referenced that defined Pactor-3 made it obvious that the sidebands overlapped. My email was to make the point that the Pactor-3 subcarriers have to be orthogonal to make it work and therefore Pactor-3 must be OFDM -- something that others disputed. 73, John KD6OZH - Original Message - From: Rick Karlquist To: digitalradio@yahoogroups.com Cc: digitalradio@yahoogroups.com Sent: Sunday, November 26, 2006 07:28 UTC Subject: Re: [digitalradio] Re: OFDM data is Emission Designator D1D You are still confused about the definition of orthogonal. Before Orthogonal Frequency Domain Multiplex (OFDM), there are (Non-orthogonal) Frequency Domain Multiplex (FDM). It too used each sub carrier to send an independent stream of bits. The sub carriers were NOT orthogonal. They didn't need to be because their sidebands did not overlap. OFDM squeezes more carriers into the same space by making the carriers and their modulation orthogonal to their next door neighbors. This allows some overlap. The subcarriers in Pactor-3 may indeed be orthogonal (I don't know) but that cannot be deduced from the fact that they carry independent streams of bits. Rick N6RK John B. Stephensen wrote: I should have said that the subcarriers must be orthogonal because Pactor-3 uses each subcarrier to send an independent stream of bits. In someone else's email they verified that the subcarriers are indeed orthogonal. 73, John KD6OZH - Original Message - From: Rick Karlquist To: digitalradio@yahoogroups.com Cc: digitalradio@yahoogroups.com Sent: Wednesday, November 22, 2006 19:49 UTC Subject: Re: [digitalradio] Re: OFDM data is Emission Designator D1D John B. Stephensen wrote: its orthogonal because the state of each subcarrier is independent of the state of the others. John KD6OZH That is NOT the definition of orthogonal. Rick N6RK
Re: [digitalradio] CPU performance ?
Go with the dual core and the greater amount of RAM. That is assuming all other things are equal. R Andrew O'Brien wrote: I'm out of the loop on the latest in CPU performance. I'm looking at a three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+ ( 1 Gig of RAM , no monitor for $389), and one more ...the Intel® Pentium® 4 HT 524 (no monitor , 512 Megs RAM) for $410. I wonder if people here would comment on these CPU's for digital modes and the usual multi-tasking that hams do? I tend to run a logging program, a couple of digital mode applications (like Multipsk and MixW),Internet Explorer, email, all at the same time. Andy K3UK
RE: [digitalradio] CPU performance ?
I do operating systems level work for a living, and here's the rules I personally use: 1) For Windows, more memory is better than more CPU. 2GB is an excellent choice (you'll almost never be memory bound unless you're doing truly enormous things, like serious video/audio editing). In fact, there's no such thing as too much memory (my development system at work has 8GB, for example) -- If there's a lot of spare memory, Windows uses it for file caching. 2) Dual-Core CPUs are excellent: These are true multiprocessor machines... Except the two CPUs are essentially on one die. Don't confuse dual-core with Hyperthreading (HT) technology which is SORT of like two CPUs but not REALLY. 3) In my estimation AMD is leading Intel, both in value for money (bang for the buck) and in general processor throughput (just plain bang). Intel is leading AMD in terms of power conservation (bang for the watt). Of ANY of the modern dual-core CPUs, I doubt you could use all the CPU power with an app like MixW -- Lots of people run MixW on lower-end laptops successfully after all. If you expect to upgrade to Windows Vista, be very careful what GRAPHIC card you buy. Yes, you'll need memory and CPU power, but equally important in Vista is you'll need a reasonably capable graphics card. As an aside: Don't expect to upgrade to Windows Vista in 64-bit mode anytime soon if you use any special drivers for radio applications (such as the MixW RigExpert driver, for example). On 64-bit Windows all kernel-mode software has to be digitally signed and it's unlikely casual/hobby/small devs are going to pay the cost to acquire the necessary code-signing credentials. Sorry to have wandered a bit far afield from your original questions, but I figured I'd write a relatively comprehensive answer... Even if just for the archives. Peter K1PGV
[digitalradio] Re: CPU performance ?
--- In digitalradio@yahoogroups.com, Robert Meuser [EMAIL PROTECTED] wrote: Go with the dual core and the greater amount of RAM. That is assuming all other things are equal. Thanks for the feedback guys, I will go with the dual core that comes with 1 gig of RAM that can be upgraded 4 Gigs. I'll check Dave's HD related spefications. The packages states 160GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache , will do more research. After the comments on the widescreen monitor, I'm tempted to add a 20 inch wide screen for $160 more. Andy.
[digitalradio] Re: CPU performance ?
A critical parameter with monitors in amateur radio applications is resolution. $160 for a 20 monitor that can't do better than 1024 x 768 would be no bargain. 1280 x 1024 would be reasonable for that price, but check its reviews for good text readability. You should also verify that the display adaptor in the system you choose can support this resolution with reasonable color depth. Until recently, my primary display was a Nanao 20 LCD whose resolution is 1600 x 1200. This many bits is nice for running multiple applications simultaneously, but I found myself squinting after long development sessions; 22 or 24 would be a better monitor size for this resolution. When I built a new development system, I upgraded to a 30 Dell LCD whose resolution is 2560 x 1600. All that room is great, but I wish it were concave. In hindsight, an angled pair of 22 displays running 1600 x 1200 might have been better. 73, Dave, AA6YQ --- In digitalradio@yahoogroups.com, Andrew O'Brien [EMAIL PROTECTED] wrote: --- In digitalradio@yahoogroups.com, Robert Meuser robertm@ wrote: Go with the dual core and the greater amount of RAM. That is assuming all other things are equal. Thanks for the feedback guys, I will go with the dual core that comes with 1 gig of RAM that can be upgraded 4 Gigs. I'll check Dave's HD related spefications. The packages states 160GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache , will do more research. After the comments on the widescreen monitor, I'm tempted to add a 20 inch wide screen for $160 more. Andy.
[digitalradio] Fast HF Modem Development Re: OFDM data D1D
I foresee and recommend this variable OFDM symbol approach as the best next step in fast HF modems for hams. Those systems are actually very sucessful in high data rate applications like digital sstv. Appearing 2 years ago they have become mainstream in a very short time. Its not the next step, it's already old stuff, HI
Re: [digitalradio] Re: CPU performance ?
The 22 monitor that I use is 1680 x 1050 with 32 bit color depth. I would not want it any higher in resolution since it would have smaller icons and characters, however, when you use a document on such a wide screen, you can scale the image font sizes up and down as desired with programs such as Open Office. For sight impaired, you can make the fonts quite huge and still manage to not overrun the margins. 73, Rick, KV9U Dave Bernstein wrote: A critical parameter with monitors in amateur radio applications is resolution. $160 for a 20 monitor that can't do better than 1024 x 768 would be no bargain. 1280 x 1024 would be reasonable for that price, but check its reviews for good text readability. You should also verify that the display adaptor in the system you choose can support this resolution with reasonable color depth. Until recently, my primary display was a Nanao 20 LCD whose resolution is 1600 x 1200. This many bits is nice for running multiple applications simultaneously, but I found myself squinting after long development sessions; 22 or 24 would be a better monitor size for this resolution. When I built a new development system, I upgraded to a 30 Dell LCD whose resolution is 2560 x 1600. All that room is great, but I wish it were concave. In hindsight, an angled pair of 22 displays running 1600 x 1200 might have been better. 73, Dave, AA6YQ
Re: [digitalradio] New multimode program for Linux
I have tried out quite a few live distros. None really impress me from a graphics standpoint because Linux is different than Windows and just does not have the finesse or whatever it is that it is missing. But it is still quite functional. I did burn a Linux Mint distro in the past couple days and I like the looks of it better than Ubuntu. It is actually Ubuntu with many proprietary drivers already in place and developed by some folks in Ireland I believe. This international cooperation is stupendous when you think about it. Almost every day some organization or government switches to Linux and it is fascinating to watch this unfold. Especially now with the new Windows/Linux pact announced in the last week, although many are wary of MS. I even had a QSO with W1HJK the other day. Of course, at the time I did not realize he was a major ham radio Linux developer:) My experience with a 450 MHz Pentium was dismal. Just not adequate speed for me so I put Win 98 back on it and replaced my mother's 166 Pentium that was pathetic. The next computer would be a fairly high end machine but not at the bleeding edge, just back from there where it seems you get the most bang for the buck. I have this e-machine P4-516 I bought a year ago for about $400 which is nearly a 3 gig speed but only 512 Meg RAM. Leigh L Klotz, Jr. wrote: Instead of switching Why not get a second computer and try it? You can use a cheap IOGear video switch, or use VNC and operate it from your Windows box (or vice versa). An 800MHz P3 or up ought to give you a pleasant enough experience. I used to recommend RedHat, but Fedora seems to have gone downhill in quality. Ubuntu seems to go smoothly these days.
Re: [digitalradio] Fast HF Modem Development Re: OFDM data D1D
Which has made me wonder why so few digital hams send FAX images on the phone bands. I still would like to get a clear understanding of just how far we can go here in the U.S. with what constitutes a FAX. 73, Rick, KV9U cesco12342000 wrote: I foresee and recommend this variable OFDM symbol approach as the best next step in fast HF modems for hams. Those systems are actually very sucessful in high data rate applications like digital sstv. Appearing 2 years ago they have become mainstream in a very short time. Its not the next step, it's already old stuff, HI
[digitalradio] Re: FCC to restrict BW of digital modes?
Murray, Has there been any word on whether MixW will ever support DominoEX? All it would take is an add-on DLL. But then I am not the one writing it, hi hi. 73, Steve N6VL
