[digitalradio] RFSM8000
Still testing RFSM8000 , VE5MU on 7135 USB, email server address [EMAIL PROTECTED] , VE5GPM on 14103.0 USB, email server [EMAIL PROTECTED] Both stations running non-standard modulation, and will be operating from 1800Z today to 1800Z tomorrow. Both stations will switch to ALE400 for a 24 hour test on the same frequencies. John VE5MU
Re: [digitalradio] RFSM8000
Hi John, Using RFSM 2400, I was able to connect with the non standard mode, but had to go to 50 watts, and initially showed a 5 dB S/N connection, but nothing would go through. There is a beep tone at the beginning of each transmission and I see a large spike on the spectrum display which I am guessing should be centered on the red vertical line? It is difficult to have enough time to estimate where the spike should be set but your rig is apparently very close to the exact frequency. I still very much appreciate the constellation display and this program has been the first that that has allowed me to see this dynamically displayed on screen. I have seen this on diagrams, of course, but seeing it in a real life display it is very impressive. After many retries, no data was able to go through from what I could tell as the % display stayed at zero %. Since there was no file transfer of my image file to VE5MU on the 7.135 MHz frequency, I increased power to around 200 watts, but it still did not get any throughput and I did not want to push it any more than that since this is only a 600 watt linear and I may have been a bit over where I should have been. Maybe I was overdriving my rig and /or amplifier? What would be a maximum setting for a typical 100 watt rig that can handle full duty cycle? (ICOM 756 Pro 2). I tried it again a bit later with 25 watts on the rig and only 100 watts on the amplifier, but no connection at all. From what I can tell, a much more sensitive mode would need to be developed to make this practical for typical amateur HF paths with 100 watt rigs and modest antennas. 73, Rick, KV9U John Bradley wrote: Still testing RFSM8000 , VE5MU on 7135 USB, email server address [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] , VE5GPM on 14103.0 USB, email server [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]. Both stations running non-standard modulation, and will be operating from 1800Z today to 1800Z tomorrow. Both stations will switch to ALE400 for a 24 hour test on the same frequencies. John VE5MU
[digitalradio] Narrow SSTV contact
Recently, I had my first narrow SSTV contact with WB8ROL. I saw the signal and guessed that was what it was and brought up MMSSTV. I had earlier tried sending some CQ's but finally determined that the mode I needed was the N mode. Need to stress that to those who are planning to use these modes to get the correct one since there is a MP-73 and an MP-73N. Question: what other modes are there in MMSSTV that will work in the narrow 500 Hz bandwidth? I understand that they are not as fast but may have more detail? I normally don't have much interest in analog digital because of the poor quality images since just one hit can really mess up a picture, but maybe there are only analog narrow modes? Or are there digital ones as well? Now the most confusing thing is how do you handle text data vs the image data? If you call CQ with the image only and you contact another station using the same mode, what do you do after the initial exchange of images? Or is it possible to do it the other way and be text chatting with someone and then be able to send an image? How do you do this gracefully? 73, Rick, KV9U
RE: [digitalradio] RFSM8000
heard your connect and came and watched... band here was noisy and had QSB but signals copied into the weeds. will load up a couple of smaller picture files in your mail box ... 70k file is pretty ambitious for the band conditions great to see you try , though. jb From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Rick Sent: Wednesday, February 06, 2008 1:44 PM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] RFSM8000 Hi John, Using RFSM 2400, I was able to connect with the non standard mode, but had to go to 50 watts, and initially showed a 5 dB S/N connection, but nothing would go through. There is a beep tone at the beginning of each transmission and I see a large spike on the spectrum display which I am guessing should be centered on the red vertical line? It is difficult to have enough time to estimate where the spike should be set but your rig is apparently very close to the exact frequency. I still very much appreciate the constellation display and this program has been the first that that has allowed me to see this dynamically displayed on screen. I have seen this on diagrams, of course, but seeing it in a real life display it is very impressive. After many retries, no data was able to go through from what I could tell as the % display stayed at zero %. Since there was no file transfer of my image file to VE5MU on the 7.135 MHz frequency, I increased power to around 200 watts, but it still did not get any throughput and I did not want to push it any more than that since this is only a 600 watt linear and I may have been a bit over where I should have been. Maybe I was overdriving my rig and /or amplifier? What would be a maximum setting for a typical 100 watt rig that can handle full duty cycle? (ICOM 756 Pro 2). I tried it again a bit later with 25 watts on the rig and only 100 watts on the amplifier, but no connection at all. From what I can tell, a much more sensitive mode would need to be developed to make this practical for typical amateur HF paths with 100 watt rigs and modest antennas. 73, Rick, KV9U John Bradley wrote: Still testing RFSM8000 , VE5MU on 7135 USB, email server address [EMAIL PROTECTED] mailto:ve5mu%40sasktel.net mailto:[EMAIL PROTECTED] mailto:ve5mu%40sasktel.net , VE5GPM on 14103.0 USB, email server [EMAIL PROTECTED] mailto:ops%40sasktel.net mailto:[EMAIL PROTECTED] mailto:ops%40sasktel.net . Both stations running non-standard modulation, and will be operating from 1800Z today to 1800Z tomorrow. Both stations will switch to ALE400 for a 24 hour test on the same frequencies. John VE5MU
[digitalradio] Re: Narrow SSTV contact
--- In digitalradio@yahoogroups.com, Rick [EMAIL PROTECTED] wrote: Now the most confusing thing is how do you handle text data vs the image data? If you call CQ with the image only and you contact another station using the same mode, what do you do after the initial exchange of images? Or is it possible to do it the other way and be text chatting with someone and then be able to send an image? How do you do this gracefully? 73, Rick, KV9U Rick, most SSTV contacts are done with text templates superimposed on the images. The templates are basically like a CW conversation - Name , QTH, UR 595 etc. and prepared in advance, some have macros to make this easier. Have a look at a few of the webcam pages for the JA, VK and EU conversations for a better idea. I don't see as much of this type of QSO from the USA pages. Brad VK2QQ
[digitalradio] Re: Narrow SSTV contact
Question: what other modes are there in MMSSTV that will work in the narrow 500 Hz bandwidth? I think its limited to mp73-n, mp-110-n, mp140-n and the mc110-n, mc140-n, mc180-n modes. Unluckily i have never found a station qrv in those modes...
Re: [digitalradio] Re: Narrow SSTV contact
Hi Brad, What I am looking for would be a way to include a picture as part of the contact but not as the main object of the contact. More of a multi-media concept, but done with relatively narrow modes. If you remember back a into the 1990's, when Peter, TY1PS was very active with Clover II from Benin, and developed a program called Clover Express that enabled two Clover II stations to automatically send a small image when connecting plus being a Windows program interface which was better than the HAL software. At the time this mixed image/text data was not legal here in the U.S. so it was one of those modes that never went very far at the time. Clover II was designed similar to Pactor 2 as a 500 Hz BW mode so this type of program could be used here in the U.S., finally. We can thank Mark Miller, N5RFX for his petition that convinced the FCC to make this mode available in the text data portions of the bands here. I thought I read some thing about a way you could use MFSK16 or some other narrow mode and then switch over to send an image and then switch back. Or am I mistaken? 73, Rick, KV9U Brad wrote: Rick, most SSTV contacts are done with text templates superimposed on the images. The templates are basically like a CW conversation - Name , QTH, UR 595 etc. and prepared in advance, some have macros to make this easier. Have a look at a few of the webcam pages for the JA, VK and EU conversations for a better idea. I don't see as much of this type of QSO from the USA pages.
Re: [digitalradio] RFSM8000
I have been monitoring the frequency all afternoon, but there is SWBC of course and getting stronger as the evening approaches. Tried one more time, and it did indicate a connect, but then disconnected after a few attempts. The large file I was attempting to send was not so much to send the entire file, just to see what kind of throughput would be possible. But as far as I can tell there was no throughput at all, so even a very short file would likely not have been possible to move. 73, Rick, KV9U John Bradley wrote: heard your connect and came and watched……. band here was noisy and had QSB but signals copied into the weeds. will load up a couple of smaller picture files in your mail box ….. 70k file is pretty ambitious for the band conditions great to see you try , though. jb Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Check our other Yahoo Groups http://groups.yahoo.com/group/dxlist/ http://groups.yahoo.com/group/contesting http://groups.yahoo.com/group/themixwgroup Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] Re: Narrow SSTV contact
What I am looking for would be a way to include a picture as part of the contact but not as the main object of the contact. More of a multi-media concept, but done with relatively narrow modes. I thought I read some thing about a way you could use MFSK16 or some other narrow mode and then switch over to send an image and then switch back. Or am I mistaken? 73, Rick, KV9U Hi Rick, MixW, and I think maybe also Multipsk now, can send a non-error-corrected, narrowband, fax-mode picture during a MFSK16 QSO. On the Linux side, so can fldigi. NBEMS can send a smaller picture, but absolutely error-free, in a much longer time (due to the narrow bandwidth) and communicate back and forth (automatically) between blocks using the Plain Talk facility. The picture is error-free, but the Plain Talk text is not, as the slowdown for error-free text was felt not to be worth the delays incurred, so ARQ is not used for the text. Plain talk was included mainly for the purpose of coordinating data transfers, such as increasing or decreasing speed when conditions dictate, but it is also an interesting chat-type facility, even without data transfer. The MixW fax pictures are quite good under good conditions and worth trying. While the picture is transmitting, it is not possible to communicate, though. In QuikPSK, I included the ability to transmit a color thumbnail of the operator's face as a way to enchance the QSO, but it takes 2.5 minutes for the thumbnail picture to transmit, and in some cases, especially with DX stations, it is not even possible to sustain a QSO for that long. I just thought it would be nice to see what the other operator you are talking with looks like. DigiPan, VBdigi, and fldigi have a QRZ Lookup capability so those with Internet access many times can view a high resolution picture of the operator or his shack, if it is on his QRZ site. Since this can be done during a QSO (I do it all the time), there is no interruption to the QSO, but only one picture is available, unless a link to a website is included, and QRZ.COM is not universally used, of course. With the proliferation of broadband, I think using an Internet lookup is often a useful way to view pictures of interest and still QSO in the normal way. Error-free pictures just take a long time, or lots of bandwidth, to transmit. So, there already many ways to integrate images with QSO's in addition to SSTV techniques, but none of them may be all what we wish they were! 73, Skip KH6TY
[digitalradio] Re: Narrow SSTV contact
Rick, Patrick sent me this... wanna play? :-) There is a Word document which goal is to show from two Multipsk snapshots how to do the basic operations in SSTV in MFSK16. This document (0.5 Mo) is available from my site site http://f6cte.free.fr/SSTV_IN_MFSK16_EASY_WITH_MULTIPSK.doc http://f6cte.free.fr/SSTV_IN_MFSK16_EASY_WITH_MULTIPSK.doc (copy and paste this adress in Internet Explorer (or equivalent) Net adress field). 73 Patrick I thought I read some thing about a way you could use MFSK16 or some other narrow mode and then switch over to send an image and then switch back. Or am I mistaken? 73, Rick, KV9U 73... Jon W1MNK
Re: [digitalradio] Re: Narrow SSTV contact
There are a few of us experimenting with MP73-N on 10.132 MHz (USB). There is no set schedule as yet but some additional information can be found at: http://www.30meterdigital.org/ 73 de Tim, N9PUZ cesco12342000 wrote: Question: what other modes are there in MMSSTV that will work in the narrow 500 Hz bandwidth? I think its limited to mp73-n, mp-110-n, mp140-n and the mc110-n, mc140-n, mc180-n modes. Unluckily i have never found a station qrv in those modes...
[digitalradio] RFI - FOUND!
All, The RFI problem has been resolved. It turned out to be a charger for an electric motorbike left on cycle mode. The power company investigator left a note on my door explaining what it was. I don't have the details as to what kind of motorbike or charger, but I will pass that information along when I get it. The owner of the motorbike (a neighbor located 500 feet from me) unplugged the charger. It was nice to turn on the HF rig and not hear that noise. The issue was taken care of within 48 hours thanks to LIPA inspector Mike Malinowski (N2QOY). I also received an e-mail from local ARRL Section Manager Tom Carruba (KA2D) and ARRL Technical Coordinator Steve Barreres (K2CX) offering their assistance. Good to know we're not alone. I have a recording of the noise and can e-mail the file if anyone would like to hear it. Thanks to all -- please reply direct. Tony -K2MO
Re: [digitalradio] RFI - FOUND!
Great news Tony. On Feb 6, 2008 6:37 PM, Tony [EMAIL PROTECTED] wrote: All, The RFI problem has been resolved. It turned out to be a charger for an electric motorbike left on cycle mode. The power company investigator left a note on my door explaining what it was. I don't have the details as to what kind of motorbike or charger, but I will pass that information along when I get it. The owner of the motorbike (a neighbor located 500 feet from me) unplugged the charger. It was nice to turn on the HF rig and not hear that noise. The issue was taken care of within 48 hours thanks to LIPA inspector Mike Malinowski (N2QOY). I also received an e-mail from local ARRL Section Manager Tom Carruba (KA2D) and ARRL Technical Coordinator Steve Barreres (K2CX) offering their assistance. Good to know we're not alone. I have a recording of the noise and can e-mail the file if anyone would like to hear it. Thanks to all -- please reply direct. Tony -K2MO -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
[digitalradio] SSB on 14070
Do any of the IARU regions allow voice on 14070? I ask, because around 1800EST, there was a S9+10 signal around this frequency. I wasn't in the same room as the rig, but was able to confirm (by turning the rig WAY UP and getting the XYL really mad!!) that it was voice, language not determined. I wonder if this was an interloper? Anyone else hear it? 73... Jon W1MNK
Re: [digitalradio] SSB on 14070
I have ben hearing what sounds like Vietnamese on 14.070 LSB. I suspect bootleg operation. FYI I used notch filtering to eliminate the strong psk signals. A few weeks ago I heard both sides of an SSB QSO in English. I suspect a different problem of cox keying there... Leigh/WA5ZNU On Wed, 6 Feb 2008 4:51 pm, Jon Maguire wrote: Do any of the IARU regions allow voice on 14070? I ask, because around 1800EST, there was a S9+10 signal around this frequency. I wasn't in the same room as the rig, but was able to confirm (by turning the rig WAY UP and getting the XYL really mad!!) that it was voice, language not determined. I wonder if this was an interloper? Anyone else hear it? 73... Jon W1MNK Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Check our other Yahoo Groups http://groups.yahoo.com/group/dxlist/ http://groups.yahoo.com/group/contesting http://groups.yahoo.com/group/themixwgroup Yahoo! Groups Links
Re: [digitalradio] RFSM8000
Rick de Les From: Rick Sent: Thursday, February 07, 2008 6:44 AM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] RFSM8000 Hi John, Using RFSM 2400, I was able to connect with the non standard mode, but had to go to 50 watts, and initially showed a 5 dB S/N connection, but nothing would go through. There is a beep tone at the beginning of each transmission and I see a large spike on the spectrum display which I am guessing should be centered on the red vertical line? It is difficult to have enough time to estimate where the spike should be set but your rig is apparently very close to the exact frequency. I still very much appreciate the constellation display and this program has been the first that that has allowed me to see this dynamically displayed on screen. I have seen this on diagrams, of course, but seeing it in a real life display it is very impressive -Rick Below the constellation display you will see a +/- figure on receive - just make this figure read 0 (zero) or as close as you can using your main tuning dial at very slow speed while receiving ---Regards Les
[digitalradio] Olivia
Has anyone ever experimented with the 2 tone Olivia submodes? How does say the 2/250 mode compare to regular RTTY? 73, Sholto KE7HPV.
RE: [digitalradio] SSB on 14070
technically Canada allows voice on 14070, or anywhere else for that matter. in practice hams here follow the region 2 bandplan, although not mandatory suspect there are a number of other countries who do not specifiy mode John VE5MU From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jon Maguire Sent: Wednesday, February 06, 2008 6:51 PM To: digitalradio@yahoogroups.com Subject: [digitalradio] SSB on 14070 Do any of the IARU regions allow voice on 14070? I ask, because around 1800EST, there was a S9+10 signal around this frequency. I wasn't in the same room as the rig, but was able to confirm (by turning the rig WAY UP and getting the XYL really mad!!) that it was voice, language not determined. I wonder if this was an interloper? Anyone else hear it? 73... Jon W1MNK
RE: [digitalradio] RFSM8000
heard your second connect as well, as a suggestion make sure that the receive on your rig is as wide as possible , 3khz or better John VE5MU -Original Message- From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Rick Sent: Wednesday, February 06, 2008 4:34 PM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] RFSM8000 I have been monitoring the frequency all afternoon, but there is SWBC of course and getting stronger as the evening approaches. Tried one more time, and it did indicate a connect, but then disconnected after a few attempts. The large file I was attempting to send was not so much to send the entire file, just to see what kind of throughput would be possible. But as far as I can tell there was no throughput at all, so even a very short file would likely not have been possible to move. 73, Rick, KV9U John Bradley wrote: heard your connect and came and watched... band here was noisy and had QSB but signals copied into the weeds. will load up a couple of smaller picture files in your mail box ... 70k file is pretty ambitious for the band conditions great to see you try , though. jb Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Check our other Yahoo Groups http://groups.yahoo.com/group/dxlist/ http://groups.yahoo.com/group/contesting http://groups.yahoo.com/group/themixwgroup Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.20/1262 - Release Date: 2/6/2008 9:13 AM
Re: [digitalradio] Olivia
It should be better, because of the Walsh code layer. I have used it for tests among other Olivia modes, but never compared RTTY and 2/250 Olivia. It worked fairly well, but it was just for curiosity sake, more than anything else. It was not a serious, well planned, exhaustive test. 73, Jose, CO2JA Sholto Fisher wrote: Has anyone ever experimented with the 2 tone Olivia submodes? How does say the 2/250 mode compare to regular RTTY? 73, Sholto KE7HPV. __ Participe en Universidad 2008. 11 al 15 de febrero del 2008. Palacio de las Convenciones, Ciudad de la Habana, Cuba http://www.universidad2008.cu
Re: [digitalradio] RFI - FOUND!
Great news Tony. Thanks Andy -- the RFI problem was resolved in 48 hours. I guess it doesn't get any better than that! Thanks for putting up with the off-topic posts Andy. Tony -K2MO - Original Message - From: Andrew O'Brien [EMAIL PROTECTED] To: digitalradio@yahoogroups.com Sent: Wednesday, February 06, 2008 7:50 PM Subject: Re: [digitalradio] RFI - FOUND! Great news Tony. On Feb 6, 2008 6:37 PM, Tony [EMAIL PROTECTED] wrote: All, The RFI problem has been resolved. It turned out to be a charger for an electric motorbike left on cycle mode. The power company investigator left a note on my door explaining what it was. I don't have the details as to what kind of motorbike or charger, but I will pass that information along when I get it. The owner of the motorbike (a neighbor located 500 feet from me) unplugged the charger. It was nice to turn on the HF rig and not hear that noise. The issue was taken care of within 48 hours thanks to LIPA inspector Mike Malinowski (N2QOY). I also received an e-mail from local ARRL Section Manager Tom Carruba (KA2D) and ARRL Technical Coordinator Steve Barreres (K2CX) offering their assistance. Good to know we're not alone. I have a recording of the noise and can e-mail the file if anyone would like to hear it. Thanks to all -- please reply direct. Tony -K2MO -- Andy K3UK www.obriensweb.com (QSL via N2RJ)
