Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On Jul 9, 2007, at 2:59 AM, David Woolley wrote: Bill Coleman wrote: What you'd end up with for the receiver would be a Mixer and clean DDS, followed by a high-speed, wide-range A/D converter. Everything else I don't understand why you write about such things as in the future. There are several products on the amateur market, although I don't know if any of them use a DDS VFO. What I wrote about in 1995 was the entire receiver as a very simple bit of hardware, and then lots of software. I've seen several attempts at computer/radio integration, but they all used far more hardware than I imagined. That's why I used the future tense. The telcos where doing direct digital conversion from analogue carrier systems to multiple PCM channels a long time ago. I think before your 1995 article. The technology has been around a while. It's just waiting to be applied to amateur radio Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On Jul 9, 2007, at 4:44 PM, Brian Lloyd wrote: Well, you have just described the product offerings from Flex Radio. Not exactly what I had in mind -- there's way too much hardware involved. My concern over the Flex Radio SDR approach compared to Elecraft's approach in the K3 is that, in order to be able to receive multiple signals simultaneously, e.g. like we do in demodulating PK31, you have to accept all the noise and cruft in the wider passband. If there is a strong signal in there you have to pass it through to the A:D and hope that the A:D has sufficient dynamic range to deal with the difference between the desired signal and the undesired signal. No. You don't hope the A/D has enough dynamic range. You have to design in that kind of dynamic range. Which means you've got to use an A/D converter which has lots of bits -- very expensive today. Elecraft gets rid of the undesired signal by using tight roofing filters. Yup, that's one approach. It also is very cost-effective for a single- signal type receiver. It's still possible to get good IMD characteristics with an up- conversion general-coverage receiver. There are some $10,000 radios on the market that do exactly this. But all of them upconvert to something like a 70MHz 1st IF. You aren't going to find a 200Hz roofing filter there. That means you aren't going to get the good close-in (1KHz spacing) IMD and BDR performance. So to get general coverage receiver performance you give up close-in BDR and IMD performance. Again TANSTAAFL. Consider the Yaesu FT DX 9000. This design has a 40 MHz first IF that has roofing filters of 3, 6 and 15 kHz. Similarly, the Icom IC-7800. This design has a first IF of 64.455 MHz and roofing filters of 3, 6 and 15 kHz. Both of these designs have competitive IMD and BDR characteristics. It is possible to do this with wider roofing filters in an up- conversion design. However, it isn't as cost-effective as the Elecraft design. (I can buy several fully-loaded K3s for the price of one FT DX 9000 or IC-7800) I agree. Elecraft should be receiving the order from the ARRL for our school's K2. I plan to let the kids (4th-8th grades) build the rig under my guidance. I think that the K2 will perform a lot better than the other rigs that they were offering us, e.g. Icom IC-706, and I think that the kids will understand and appreciate the radio better if they have a hand in building, testing, and calibrating it. I totally agree. When I was first licensed, one of my dreams was to design and build a state of the art homebrew transceiver. For a number of reasons, I never quite did that, but with the Elecraft K2/100, I've come close. (I didn't design it, but I certainly built it) Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
Bill Coleman wrote: What you'd end up with for the receiver would be a Mixer and clean DDS, followed by a high-speed, wide-range A/D converter. Everything else I don't understand why you write about such things as in the future. There are several products on the amateur market, although I don't know if any of them use a DDS VFO. The interesting part of this approach is that we can re-define what we mean by a receiver. The detection portion of the radio need not resolve to the width of an audio channel. Consider a receiver that can decode every CW signal in a 50 kHz portion of the band. Simultaneously. How useful would that be? The telcos where doing direct digital conversion from analogue carrier systems to multiple PCM channels a long time ago. I think before your 1995 article. -- David Woolley Emails are not formal business letters, whatever businesses may want. RFC1855 says there should be an address here, but, in a world of spam, that is no longer good advice, as archive address hiding may not work. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On 7/9/07, Bill Coleman [EMAIL PROTECTED] wrote: One way of simplifying this whole process is to move the radio into the computer. This is in line with a prediction I made way back in 1995 on the CQ-Contest list -- that the radio of the future would be inside the computer. I hope not. Clearly it's an option, and I can see the attraction for the experimenter who wants to be able to make mods and recompile their radio. The folks who buy FlexRadios seem to like the idea. But they are a pretty small minority. Computers are very versatile, but being general purpose tools they don't often do a specific job better than dedicated hardware. Radios don't crash, get infected by viruses or spyware or need critical updates every couple of weeks. They are more portable and use less power than computers - something we should all think about in these environmentally conscious days. Also I personally prefer to operate real radio controls than click buttons on a computer screen. -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? www.Ham-Directory.com: the best ham resources on the net ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
One way of simplifying this whole process is to move the radio into the computer. This is in line with a prediction I made way back in 1995 on the CQ-Contest list -- that the radio of the future would be inside the computer. In 1995, processors were just appearing that had sufficient DSP capability to do this. 12 years later, it would take a relatively insignificant portion of the main CPU (or just a portion of a few cores, as multi-core machines are now common). What you'd end up with for the receiver would be a Mixer and clean DDS, followed by a high-speed, wide-range A/D converter. Everything else would be done in the host computer. The transmitter would go the opposite way, a D/A converter followed by a mixer fed by a DDS. Power amplification could be external to the computer (if the transceiver were a card). The interesting part of this approach is that we can re-define what we mean by a receiver. The detection portion of the radio need not resolve to the width of an audio channel. Consider a receiver that can decode every CW signal in a 50 kHz portion of the band. Simultaneously. How useful would that be? Well, you have just described the product offerings from Flex Radio. They are certainly interesting competitors to Elecraft. They are a completely different approach to constructing the radio. I am not convinced that their approach is better than Elecraft's but they are certainly interesting. It also would be good to sell the receiver and transmitters separately. That way, obtaining the two receiver, one transmitter configuration needed by SO2R operation could be inexpensively obtained. Or they could be multiple boards in the same chassis. Of course, to achieve the IMD and dynamic range of the K3, the mixer and A/D would be pretty marvelous pieces of equipment. Elecraft has exactly the same issues in the K3. My concern over the Flex Radio SDR approach compared to Elecraft's approach in the K3 is that, in order to be able to receive multiple signals simultaneously, e.g. like we do in demodulating PK31, you have to accept all the noise and cruft in the wider passband. If there is a strong signal in there you have to pass it through to the A:D and hope that the A:D has sufficient dynamic range to deal with the difference between the desired signal and the undesired signal. Elecraft gets rid of the undesired signal by using tight roofing filters. Basically you make you choice and accept the limitations. Elecraft has optimized for reception of a single signal. Want the ultimate in CW reception? I think that the K3 is probably the winner. Want the ability to demodulate several signals at once or do some new wideband mode? I think that you have to look at the Flex Radio offerings. But you give up performance in one area to get performance in the other. There ain't no such thing as a free lunch. Let me put it another way: one of the reasons that the Elecraft receivers work so well is that they do fewer conversions and use lower IF frequencies so that they can put good filtering as far forward in the chain as possible. This gets rid of products that could cause IMD in later stages. It's still possible to get good IMD characteristics with an up- conversion general-coverage receiver. There are some $10,000 radios on the market that do exactly this. But all of them upconvert to something like a 70MHz 1st IF. You aren't going to find a 200Hz roofing filter there. That means you aren't going to get the good close-in (1KHz spacing) IMD and BDR performance. So to get general coverage receiver performance you give up close-in BDR and IMD performance. Again TANSTAAFL. Elecraft has apparently mastered the art of offering high- performance gear at an excellent price point. I agree. Elecraft should be receiving the order from the ARRL for our school's K2. I plan to let the kids (4th-8th grades) build the rig under my guidance. I think that the K2 will perform a lot better than the other rigs that they were offering us, e.g. Icom IC-706, and I think that the kids will understand and appreciate the radio better if they have a hand in building, testing, and calibrating it. (Besides, it will dovetail nicely with my this is how a radio works section in science class.) I want a whole boatload of demodulators there in the K3's DSP with access coming out to me in some convenient fashion -- like on an ethernet connector. Sounds like what you really want is something more like the 1995 pipe dream. Well, it is not a pipe-dream anymore. You can have it. It all depends on what parameters you want to optimize for. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On Jun 19, 2007, at 9:42 AM, Brian Lloyd wrote: Not true. The K3 converts from A:D as a step in the second IF. The final filtering takes place in the K3's DSP as does the demodulation. If you then go to a soundcard you are now adding another conversion and a third IF. The K3's second IF (DSP) does its conversion and filtering but then does a conversion to a third IF, including a conversion from digital back to analog. We tend think of this as audio but it really is not. It is a third IF with no control over the AGC. The final amplification, filtering, and demodulation now takes place in the computer's DSP. One way of simplifying this whole process is to move the radio into the computer. This is in line with a prediction I made way back in 1995 on the CQ-Contest list -- that the radio of the future would be inside the computer. In 1995, processors were just appearing that had sufficient DSP capability to do this. 12 years later, it would take a relatively insignificant portion of the main CPU (or just a portion of a few cores, as multi-core machines are now common). What you'd end up with for the receiver would be a Mixer and clean DDS, followed by a high-speed, wide-range A/D converter. Everything else would be done in the host computer. The transmitter would go the opposite way, a D/A converter followed by a mixer fed by a DDS. Power amplification could be external to the computer (if the transceiver were a card). The interesting part of this approach is that we can re-define what we mean by a receiver. The detection portion of the radio need not resolve to the width of an audio channel. Consider a receiver that can decode every CW signal in a 50 kHz portion of the band. Simultaneously. How useful would that be? It also would be good to sell the receiver and transmitters separately. That way, obtaining the two receiver, one transmitter configuration needed by SO2R operation could be inexpensively obtained. Of course, to achieve the IMD and dynamic range of the K3, the mixer and A/D would be pretty marvelous pieces of equipment. Let me put it another way: one of the reasons that the Elecraft receivers work so well is that they do fewer conversions and use lower IF frequencies so that they can put good filtering as far forward in the chain as possible. This gets rid of products that could cause IMD in later stages. It's still possible to get good IMD characteristics with an up- conversion general-coverage receiver. There are some $10,000 radios on the market that do exactly this. Elecraft has apparently mastered the art of offering high-performance gear at an excellent price point. I want a whole boatload of demodulators there in the K3's DSP with access coming out to me in some convenient fashion -- like on an ethernet connector. Sounds like what you really want is something more like the 1995 pipe dream. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3) Question}
On 6/18/07, Doug Faunt N6TQS +1-510-655-8604 [EMAIL PROTECTED] wrote: The capability of sending decoded data out the serial port would be most useful. Yes, but even if it *can* do this, I'd bet that it is going to be encapsulated in a K3 protocol message like the output from other CAT commands, so you'd need a dedicated bit of software to display the output, and enter input, not a simple terminal program. -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On 6/18/07, Toby Deinhardt [EMAIL PROTECTED] wrote: It has always struck me as a bit silly to go from analog to digital back to analog only to return to digital, which is what you would be doing with the K3 and a sound card based solution. I think the number of conversions is the same, it's just a matter of whether the conversion is done in the computer or the radio. Since a computer has a more powerful processor, I would expect it to do a better job, if available. The value of the built-in encoder/decoder is to allow operation using popular data modes *without* a computer. -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
I think the number of conversions is the same, it's just a matter of I *SERIOUSLY* doubt that Elecraft would leave the digital world once the low IF has been sampled, except for the loud speaker / head phones / line out. It wouldn't make sense, imho. vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On Jun 19, 2007, at 1:08 AM, Julian G4ILO wrote: On 6/18/07, Toby Deinhardt [EMAIL PROTECTED] wrote: It has always struck me as a bit silly to go from analog to digital back to analog only to return to digital, which is what you would be doing with the K3 and a sound card based solution. I think the number of conversions is the same, it's just a matter of whether the conversion is done in the computer or the radio. Since a computer has a more powerful processor, I would expect it to do a better job, if available. The value of the built-in encoder/decoder is to allow operation using popular data modes *without* a computer. Not true. The K3 converts from A:D as a step in the second IF. The final filtering takes place in the K3's DSP as does the demodulation. Don't be fooled: all the modules are still there. It is just that some of those modular functions are now performed in digitally in DSP. If you draw all the functional blocks, e.g. gain, filter, mixer, oscillator, they are all still there in DSP. If you then go to a soundcard you are now adding another conversion and a third IF. The K3's second IF (DSP) does its conversion and filtering but then does a conversion to a third IF, including a conversion from digital back to analog. We tend think of this as audio but it really is not. It is a third IF with no control over the AGC. The final amplification, filtering, and demodulation now takes place in the computer's DSP. Let me put it another way: one of the reasons that the Elecraft receivers work so well is that they do fewer conversions and use lower IF frequencies so that they can put good filtering as far forward in the chain as possible. This gets rid of products that could cause IMD in later stages. (The IMD may still be present in the stage but if you get rid of one of the offending signals you won't experience the IMD.) What you are suggesting is that we negate one of the advantages that Elecraft has built into the radio. This seems silly to me. My interest in radio is data communications. It may just be the equivalent of instant messaging, e.g. PSK31, or it may be something more complex, e.g. IP over PACTOR-III (OFDM). The K3 is [almost] unique in its ability to do the demodulation in its DSP and have that process optimally coordinate with the rest of the stages in the radio, i.e. it will do the best possible job with the signal. Frankly, I wouldn't want to give that up. I want a whole boatload of demodulators there in the K3's DSP with access coming out to me in some convenient fashion -- like on an ethernet connector. (Sorry, I just couldn't resist. :-) 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3) Question}
Of course. That's a pretty simple decoding job- display this string, don't display this one. 73, doug Date: Tue, 19 Jun 2007 09:01:17 +0100 From: Julian G4ILO [EMAIL PROTECTED] Content-Disposition: inline On 6/18/07, Doug Faunt N6TQS +1-510-655-8604 [EMAIL PROTECTED] wrote: The capability of sending decoded data out the serial port would be most useful. Yes, but even if it *can* do this, I'd bet that it is going to be encapsulated in a K3 protocol message like the output from other CAT commands, so you'd need a dedicated bit of software to display the output, and enter input, not a simple terminal program. -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
Exactly the case. With the built-in decoder you can take the K3 someplace portable without a computer and still send and receive PSK31/RTTY just as easily as having a QSO in CW. - 73, Greg - AB7R Whidbey Island WA NA-065 On Tue Jun 19 4:08 , Julian G4ILO sent: On 6/18/07, Toby Deinhardt [EMAIL PROTECTED] wrote: It has always struck me as a bit silly to go from analog to digital back to analog only to return to digital, which is what you would be doing with the K3 and a sound card based solution. I think the number of conversions is the same, it's just a matter of whether the conversion is done in the computer or the radio. Since a computer has a more powerful processor, I would expect it to do a better job, if available. The value of the built-in encoder/decoder is to allow operation using popular data modes *without* a computer. -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
- Original Message - From: [EMAIL PROTECTED] Why would I want to use a soundcard program if I've got a good demodulator (RTTY, PSK) in the K3? This is a good example of the cut-off between the K3's firmware and PC software. If you are going to use a PC then the logical solution is to use PC software - it will be a lot more flexible, offer many more features such as macros, waterfall display and logging, often integrated. What about PSK63 / PSK125? Assuming that a capable program exists for Windows or your favoured OS then Elecraft's effort could be better spent elsewhere. All my opinion, Simon HB9DRV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Simon Brown (HB9DRV) wrote: - Original Message - From: [EMAIL PROTECTED] Why would I want to use a soundcard program if I've got a good demodulator (RTTY, PSK) in the K3? This is a good example of the cut-off between the K3's firmware and PC software. If you are going to use a PC then the logical solution is to use PC software - it will be a lot more flexible, offer many more features such as macros, waterfall display and logging, often integrated. What about PSK63 / PSK125? Assuming that a capable program exists for Windows or your favoured OS then Elecraft's effort could be better spent elsewhere. All my opinion, Simon HB9DRV Absolutely. If memory serves the RTTY and PSK decode on the K3 is going to be scrolling text. I like having everything the other station sends available in formatted text, like HRD, MixW, FLDigi, and the others. - -- R. Kevin Stover, ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGdsci11jxjloa2wsRAuXCAJ9auEYXw096W9RbQvT+9IwflgSx9ACg1tcD G+yyeLiK4L16TKF2BAz8pBM= =xBJM -END PGP SIGNATURE- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
Dream Ideally the K3 would stream I and Q signals at 44k samples per second... /Dream It has always struck me as a bit silly to go from analog to digital back to analog only to return to digital, which is what you would be doing with the K3 and a sound card based solution. vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? ( #200) DOK C12, BCC, DL-QRP-AG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3)Question}
On Jun 18, 2007, at 1:51 PM, Toby Deinhardt wrote: Dream Ideally the K3 would stream I and Q signals at 44k samples per second... /Dream It has always struck me as a bit silly to go from analog to digital back to analog only to return to digital, which is what you would be doing with the K3 and a sound card based solution. Absolutely 100% correct. If I have to use a sound-card to do a digital mode with the K3 then there is no real advantage to the K3 over the K2. 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3) Question}
Hi Greg, I don't think so as there is no way to ... ... soundcard program that will allow you to do this? Why would I want to use a soundcard program if I've got a good demodulator (RTTY, PSK) in the K3? I would have thought that the K3 can send demodulated data via the RS-232 to the computer and the computer would be able to send plain ASCII to the K3 for data mode transmission. If the K3 can not do this, I would vote that this should be on the future feature list. vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3) Question}
On 6/18/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi Greg, I don't think so as there is no way to ... ... soundcard program that will allow you to do this? Why would I want to use a soundcard program if I've got a good demodulator (RTTY, PSK) in the K3? I would have thought that the K3 can send demodulated data via the RS-232 to the computer and the computer would be able to send plain ASCII to the K3 for data mode transmission. If the K3 can not do this, I would vote that this should be on the future feature list. This would be useful for remote control. It would also be useful on a local PC if you wanted to keep your sound card free for some other use (I ended up with a RigExpert interface because of this) but I can't see data mode programs like MixW rushing to support such a facility. The Icom 756Pro has had a RTTY decode facility for years but I have no idea if the decoded data is accessible by external software. -- Julian, G4ILO G4ILO's Shack: www.g4ilo.com K2 s/n: 392 K3 s/n: ??? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3) Question}
Given the increasing difficulty of producing a 45 baud 5 bit code, having translation both ways in the K3 would be useful, even with a computer attached. And the K3 has what I expect to be a reasonably capable CW decoder, too. In any case, if the output of the decoder can be sent out the serial port, a larger display would be pretty simple. The capability of sending decoded data out the serial port would be most useful. 73, doug Date: Mon, 18 Jun 2007 17:42:17 +0200 From: [EMAIL PROTECTED] Hi Greg, I don't think so as there is no way to ... ... soundcard program that will allow you to do this? Why would I want to use a soundcard program if I've got a good demodulator (RTTY, PSK) in the K3? I would have thought that the K3 can send demodulated data via the RS-232 to the computer and the computer would be able to send plain ASCII to the K3 for data mode transmission. If the K3 can not do this, I would vote that this should be on the future feature list. vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 RS323 and Data Modes {was YAQ - Yet Another (K3) Question}
DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=qK0GwrKhhQdX938z4mAxUnbMIRW0FHC9dweLiYH6A83lynb6Gwdrxonxqlmv5WfCZyDUUOIQBFhDv7/KmZoa7ldKW1+sA4i++mekmT3ih4XoaBAKQeZyztPNrhCL87c2yWMQLVGXs0kcCz/nxbp21q1TsP+kfsK520kOCgeelRI= Date: Mon, 18 Jun 2007 17:18:32 +0100 From: Julian G4ILO [EMAIL PROTECTED] On 6/18/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi Greg, I don't think so as there is no way to ... ... soundcard program that will allow you to do this? Why would I want to use a soundcard program if I've got a good demodulator (RTTY, PSK) in the K3? I would have thought that the K3 can send demodulated data via the RS-232 to the computer and the computer would be able to send plain ASCII to the K3 for data mode transmission. If the K3 can not do this, I would vote that this should be on the future feature list. This would be useful for remote control. It would also be useful on a local PC if you wanted to keep your sound card free for some other use (I ended up with a RigExpert interface because of this) but I can't see data mode programs like MixW rushing to support such a facility. I don't think it be very difficult to add this. MixW, for example, has provision for an external modem. The Icom 756Pro has had a RTTY decode facility for years but I have no idea if the decoded data is accessible by external software. Nope. But there's not input function there, either. Likewise the IC7000. 73, doug ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
