Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Kevin, I am using the SDR-IQ. I will Skype you when I see you on line and we can have a natter about it. Andy K3UK 2010/2/2 Gmail - Kevin, Natalia, Stacey Rochelle spar...@gmail.com Andy, What SDR board are you using? Would be interested in getting into this type of radio, but would like to dip my toes first before placing down a few $K for one. Regards Kevin, ZL1KFM. [image: My status] Get Skype http://www.skype.com/go/download and call me for free. - Original Message - *From:* Andy obrien k3uka...@gmail.com *To:* digitalradio digitalradio@yahoogroups.com *Sent:* Saturday, January 30, 2010 3:11 AM *Subject:* [digitalradio] SDR-Radio with DM780 20M Digital Band . sparc_nz Description: Binary data
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Andy, What SDR board are you using? Would be interested in getting into this type of radio, but would like to dip my toes first before placing down a few $K for one. Regards Kevin, ZL1KFM. Get Skype and call me for free. - Original Message - From: Andy obrien To: digitalradio Sent: Saturday, January 30, 2010 3:11 AM Subject: [digitalradio] SDR-Radio with DM780 20M Digital Band . sparc_nz Description: Binary data
RE: [digitalradio] SDR-Radio with DM780 20M Digital Band
Hi Kevin, You can try this - for free! The console from SDR-RADIO.com can connect to a remote SDR radio, here's a list of currently running servers: http://www.sdr-radio.com/OnAirServers/tabid/186/Default.aspx The list is growing by the week. In the words of a prophet - Taste and Enjoy! Simon Brown, HB9DRV http://sdr-radio.com From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of Gmail - Kevin, Natalia, Stacey Rochelle Andy, What SDR board are you using? Would be interested in getting into this type of radio, but would like to dip my toes first before placing down a few $K for one.
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
G'Day Simon, Thanks for the info. I have downloaded the software and I am currently listening to ur RX. Good copy, but get a bit of speaker crackle and it stutters at times, but that could be because I'm using WiFi. Would be interesting to see if I could hear myself at any of these remotes, be an interesting test. I still would like to build a SDR RX, I did see a couple of websites awhile ago, will have to search them out again. Regards Kevin, ZL1KFM. - Original Message - From: Simon HB9DRV To: digitalradio@yahoogroups.com Sent: Wednesday, February 03, 2010 9:21 AM Subject: RE: [digitalradio] SDR-Radio with DM780 20M Digital Band Hi Kevin, You can try this - for free! The console from SDR-RADIO.com can connect to a remote SDR radio, here's a list of currently running servers: http://www.sdr-radio.com/OnAirServers/tabid/186/Default.aspx The list is growing by the week. In the words of a prophet - Taste and Enjoy! Simon Brown, HB9DRV http://sdr-radio.com From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of Gmail - Kevin, Natalia, Stacey Rochelle Andy, What SDR board are you using? Would be interested in getting into this type of radio, but would like to dip my toes first before placing down a few $K for one.
RE: [digitalradio] SDR-Radio with DM780 20M Digital Band
Hi, Stutter - select AF Gain in the ribbon bar and increase the Queue Size. Simon Brown, HB9DRV http://sdr-radio.com From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of Gmail - Kevin, Natalia, Stacey Rochelle Thanks for the info. I have downloaded the software and I am currently listening to ur RX. Good copy, but get a bit of speaker crackle and it stutters at times, but that could be because I'm using WiFi. Would be interesting to see if I could hear myself at any of these remotes, be an interesting test.
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Hello Tony, According to my tests, it is only the capacity to do calculations which is the key, as a lot of digital processng is done (for example for SDR or Panoramics). I don't think RAM is important. I mean either you have sufficient memory or you have not (and you will have a message error). But if you have enough, having double or four more that the minimum does not change anything. Note: with or without BPSK31 panoramic, I have about 2 % of CPU usage. 73 Patrick - Original Message - From: Tony To: digitalradio@yahoogroups.com Sent: Saturday, January 30, 2010 4:35 AM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Patrick, Thanks for the information. As you may have read from my reply to Andy, my CPU usage seems to be very low with Multipsk. It's well below 10%. Is there a particular Multipsk mode or configuration that would tax the system? I'd like to try it and see how it affects CPU usage. Merci mon ami... Tony -K2MO - Original Message - From: Patrick Lindecker To: digitalradio@yahoogroups.com Sent: Friday, January 29, 2010 4:51 PM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Hello Tony, I have here two PC XP at about 2.4 GHz (single core): I have compare these two XP computers on the same file to decode (in 110A): * the first one (the oldest) which is an AMD Atlon 2500+ 1.09 GHz 768 Ko RAM takes 75 seconds to decode it, * the second one which is an AMD Atlon 2400+ 2 GHz 736 Ko RAM takes 20 seconds to decode it. On the most modern (about 3 years old) with SdR and RS ID detection on 44 KHz, the CPU load is about 35 to 40 %, but on the old one it is 100 % (the program does not work in fact). So normally with a modern PC it is OK. With an old PC, it can be problematic. Note: with my Vista laptop (dual core), the CPU load is about 25 % in the same conditions. 73 Patrick - Original Message - From: Tony To: digitalradio@yahoogroups.com Sent: Friday, January 29, 2010 8:36 PM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Andy, I plan on switching to SDR in the near future. My current PC is a dual CPU 2.2GHz Dell with 3 GHz RAM. Any idea what the minimum PC requirement is to run Multipsk with SDR? Could you also tell us what processor you're running now? Thanks, Tony -K2MO - Original Message - From: Andy obrien To: digitalradio Sent: Friday, January 29, 2010 9:11 AM Subject: [digitalradio] SDR-Radio with DM780 20M Digital Band One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
[digitalradio] SDR-Radio with DM780 20M Digital Band
One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Andy, I plan on switching to SDR in the near future. My current PC is a dual CPU 2.2GHz Dell with 3 GHz RAM. Any idea what the minimum PC requirement is to run Multipsk with SDR? Could you also tell us what processor you're running now? Thanks, Tony -K2MO - Original Message - From: Andy obrien To: digitalradio Sent: Friday, January 29, 2010 9:11 AM Subject: [digitalradio] SDR-Radio with DM780 20M Digital Band One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Tony, my shack PC sounds like yours. A Dell P4, 2.3 CPU , but only 1 gig of RAM. Perhaps we can compare current system resource utilization for regular Multipsk ? Regular Multipsk in PSK31 mode with a 4,3 Khz waterfall uses 25 % of CPU. With RS ID on , about the same 25-26% With Panoramic decode.. CPU increases to around 30%. Then Multipsk with Direct I/Q mode invoked , CPU increases to 60% Then RS ID in SDR /IQ direct invoked, Multipsk uses 90% of my CPU. The above is JUST Multipsk related, obviously other applications , like a web browser being open, add more demand. My daughter is away skiing this weekend, so I may borrow her Vista laptop and do a comparison. I do not know what is realistic for Multipsk with all its SDR receive capability and RS ID. I don;t really understand what actual performance increase one could expect if CPU was 3.0 Ghz rather than 2.3, Also not sure what performance improvement going to a dual core around the same clock speed would produce. On my shack PC, Multipsk seems close , I am guessing if I could eek out another 10% it would run just fine. I'm reluctant to put more RAM in to an old machine, but I do have a compatible 1 Gig memory chip that i could pilfer from another PC and see if 2 gigs of RAM ease demand on the CPU. I'm guessing it would not make much difference. I do have plenty of HD space. Hope you and the family are all OK, Andy. Andy On Fri, Jan 29, 2010 at 2:36 PM, Tony d...@optonline.net wrote: Andy, I plan on switching to SDR in the near future. My current PC is a dual CPU 2.2GHz Dell with 3 GHz RAM. Any idea what the minimum PC requirement is to run Multipsk with SDR? Could you also tell us what processor you're running now? Thanks, Tony -K2MO - Original Message - *From:* Andy obrien k3uka...@gmail.com *To:* digitalradio digitalradio@yahoogroups.com *Sent:* Friday, January 29, 2010 9:11 AM *Subject:* [digitalradio] SDR-Radio with DM780 20M Digital Band One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Hello Tony, I have here two PC XP at about 2.4 GHz (single core): I have compare these two XP computers on the same file to decode (in 110A): * the first one (the oldest) which is an AMD Atlon 2500+ 1.09 GHz 768 Ko RAM takes 75 seconds to decode it, * the second one which is an AMD Atlon 2400+ 2 GHz 736 Ko RAM takes 20 seconds to decode it. On the most modern (about 3 years old) with SdR and RS ID detection on 44 KHz, the CPU load is about 35 to 40 %, but on the old one it is 100 % (the program does not work in fact). So normally with a modern PC it is OK. With an old PC, it can be problematic. Note: with my Vista laptop (dual core), the CPU load is about 25 % in the same conditions. 73 Patrick - Original Message - From: Tony To: digitalradio@yahoogroups.com Sent: Friday, January 29, 2010 8:36 PM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Andy, I plan on switching to SDR in the near future. My current PC is a dual CPU 2.2GHz Dell with 3 GHz RAM. Any idea what the minimum PC requirement is to run Multipsk with SDR? Could you also tell us what processor you're running now? Thanks, Tony -K2MO - Original Message - From: Andy obrien To: digitalradio Sent: Friday, January 29, 2010 9:11 AM Subject: [digitalradio] SDR-Radio with DM780 20M Digital Band One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band [4 Attachments]
Andy, I configured Multipsk as you described and the CPU usage seems to average about 5 percent. Panoramic mode is about the same. I've included a few screen shots so you could see the results. Mixw seems to tax the CPU the same way as Multipsk does, but Fldigi needs a bit more to run - CPU usage jumped to 10%. I guess it's the difference in RAM. Would like to hear how the Vista laptop works out. Please let use know. Tony -K2MO PS: We're about the same here Andy, thanks for asking. Still waiting for research to catch up with type-I. Hope all is well with you and yours my friend. - Original Message - From: Andy obrien To: digitalradio@yahoogroups.com Sent: Friday, January 29, 2010 3:55 PM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Tony, my shack PC sounds like yours. A Dell P4, 2.3 CPU , but only 1 gig of RAM. Perhaps we can compare current system resource utilization for regular Multipsk ? Regular Multipsk in PSK31 mode with a 4,3 Khz waterfall uses 25 % of CPU. With RS ID on , about the same 25-26% With Panoramic decode.. CPU increases to around 30%. Then Multipsk with Direct I/Q mode invoked , CPU increases to 60% Then RS ID in SDR /IQ direct invoked, Multipsk uses 90% of my CPU. The above is JUST Multipsk related, obviously other applications , like a web browser being open, add more demand. My daughter is away skiing this weekend, so I may borrow her Vista laptop and do a comparison. I do not know what is realistic for Multipsk with all its SDR receive capability and RS ID. I don;t really understand what actual performance increase one could expect if CPU was 3.0 Ghz rather than 2.3, Also not sure what performance improvement going to a dual core around the same clock speed would produce. On my shack PC, Multipsk seems close , I am guessing if I could eek out another 10% it would run just fine. I'm reluctant to put more RAM in to an old machine, but I do have a compatible 1 Gig memory chip that i could pilfer from another PC and see if 2 gigs of RAM ease demand on the CPU. I'm guessing it would not make much difference. I do have plenty of HD space. Hope you and the family are all OK, Andy. Andy On Fri, Jan 29, 2010 at 2:36 PM, Tony d...@optonline.net wrote: Andy, I plan on switching to SDR in the near future. My current PC is a dual CPU 2.2GHz Dell with 3 GHz RAM. Any idea what the minimum PC requirement is to run Multipsk with SDR? Could you also tell us what processor you're running now? Thanks, Tony -K2MO - Original Message - From: Andy obrien To: digitalradio Sent: Friday, January 29, 2010 9:11 AM Subject: [digitalradio] SDR-Radio with DM780 20M Digital Band One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
Re: [digitalradio] SDR-Radio with DM780 20M Digital Band
Patrick, Thanks for the information. As you may have read from my reply to Andy, my CPU usage seems to be very low with Multipsk. It's well below 10%. Is there a particular Multipsk mode or configuration that would tax the system? I'd like to try it and see how it affects CPU usage. Merci mon ami... Tony -K2MO - Original Message - From: Patrick Lindecker To: digitalradio@yahoogroups.com Sent: Friday, January 29, 2010 4:51 PM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Hello Tony, I have here two PC XP at about 2.4 GHz (single core): I have compare these two XP computers on the same file to decode (in 110A): * the first one (the oldest) which is an AMD Atlon 2500+ 1.09 GHz 768 Ko RAM takes 75 seconds to decode it, * the second one which is an AMD Atlon 2400+ 2 GHz 736 Ko RAM takes 20 seconds to decode it. On the most modern (about 3 years old) with SdR and RS ID detection on 44 KHz, the CPU load is about 35 to 40 %, but on the old one it is 100 % (the program does not work in fact). So normally with a modern PC it is OK. With an old PC, it can be problematic. Note: with my Vista laptop (dual core), the CPU load is about 25 % in the same conditions. 73 Patrick - Original Message - From: Tony To: digitalradio@yahoogroups.com Sent: Friday, January 29, 2010 8:36 PM Subject: Re: [digitalradio] SDR-Radio with DM780 20M Digital Band Andy, I plan on switching to SDR in the near future. My current PC is a dual CPU 2.2GHz Dell with 3 GHz RAM. Any idea what the minimum PC requirement is to run Multipsk with SDR? Could you also tell us what processor you're running now? Thanks, Tony -K2MO - Original Message - From: Andy obrien To: digitalradio Sent: Friday, January 29, 2010 9:11 AM Subject: [digitalradio] SDR-Radio with DM780 20M Digital Band One of the things that I wanted to accomplish with an SDR receiver, is the ability to keep an eye on the whole 14065 to 14115 frequency range. If I was down on 14074 monitoring ALE 400 traffic, I would miss Olivia signals that popped up in the 14109 area. I would also miss Hell signals at 14068. Now the SDR affords the opportunity to keep an eye all all at once. My venture in to SDR from a digital mode perspective has led to a discovery that, other than Multipsk, the current state of the art does not support direct monitoring of wider I/Q data. I'm also challenged in that my PC cannot cope with the Multipsk CPU demand when I try direct monitoring. So, at the moment I am visually monitoring signals with the SDR and using traditional software methods to decode the 3-4 kHz of audio that is fed from the SDR to applications like DM780 or Fldigi. At this screen shot http://www.obriensweb.com/sdrdm780.jpg you will see how it appears. I am simply using DM780 and SDR-Radio software together. When I need to transmit, I just use my TS2000 after dialing in the signal discovered by the SDR receiver. Simon HB9DRV will likely integrate these two applications later in 2010. I did catch a Russian on RTTY this morning that I would have otherwise missed while I was slumming it in PSK31-land.. Multisk does RS-ID over this entire 14065-14115 portion, and DM780 is likely going to include this ability in the future. If people use RS-ID often enough, it will be really cool to monitor 14065-14115 and get RS ID alerts. So, just over a week playing around with the SDR receiver... I see the potential... digital mode applications are not quite there yet. When they are there (as in Multipsk) my PC isn't. This $41.00 Ebay PC may eventually get retired for a slightly improved one with better CPU. OK, back to keeping an eye on 14065-14115. A-ha, an SV3 calling CQ RTTY, 14082. Andy K3UK
