Re: [digitalradio] Re: Narrow SSTV contact
I am almost always willing to try different modes. It surprises me how few want to do this. However, I admit that many times you try the mode and realize that it is not going to become popular for one reason or another. Any new mode must have some attributes that other modes don't have and even then that does not guarantee adoption by the larger community. But it is partly that we don't have spot frequencies that everybody knows is used for x mode. Sometimes I have been monitoring other conversations and there will be comments about using other modes but they did not find any interest. That is how I made a recent VBDigi/flarq ARQ contact this week:) I don't recall ever using the SSTV part of Multipsk but would be willing to try it. 20 meters would likely be our best band between WI and FL? Perhaps 14.074? 73, Rick, KV9U Jon Maguire wrote: 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 73... Jon W1MNK _
[digitalradio] Re: Narrow SSTV contact
Rick, Sounds good. Let's coordinate via http://www.obriensweb.com/sked/index.html ... the digitalradio page. 73... Jon W1MNK I don't recall ever using the SSTV part of Multipsk but would be willing to try it. 20 meters would likely be our best band between WI and FL? Perhaps 14.074? 73, Rick, KV9U
[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] 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...
