Re: [digitalradio] Modes the work with SSB splatter
When I am camping in the south of Spain through the winter, every sunday morning our 30m pskmail link to Sweden is covered up by splatter from french SSB stations. Pskmail makes use of the gaps in the conversation (there are weak and strong stations in the round) and delivers the information. The ARQ does this job by working around the qrm, not through it. 73, Rein PA0R -Ursprüngliche Nachricht- Von: digitalradio@yahoogroups.com Gesendet: 22.10.07 04:09:58 An: digitalradio@yahoogroups.com Betreff: [digitalradio] Modes the work with SSB splatter I was trying to work some 40 meter digital this evening but there are stations that have some audio extending down to 7070 which makes it difficult to use digital up at 1500 up from 7071. In fact, for a while PJ2/WK4Y was operating LSB right on 7071.5 which I think would put his passband right over the PSK31/digital mode waterhole. I was calling CQ in MFSK16 and Frank, K1CRU came back to me from CT. I was only able to copy a small percentage however he was able to copy me 100% because he did not have the interference. We tried switching to Olivia 500/16 but that was worse and copy was barely 10% on my end, but again, 100% on his. I then suggested we try Domino EX 8 which is available in Ham Radio Deluxe/Digital Master 780, but was not able to copy him after that. I would like to hear opinions on other's experiences working through voice splatter? I know that MT-63 can work except that the wider versions can not work as deep in the noise as you find with modes like MFSK16. What have you found that worked and what did not work. 73, Rick, KV9U -- http://pa0r.blogspirit.com Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/drsked/drsked.php 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] Modes the work with SSB splatter
Who showed up first? I believe that on the light of the previous discussions, PJ2/WK4Y came first, he should not have been QRM'd with PSK, MFSK or whatever, and all activity should have stopped until that spectrum chunk was cleared, as SSB is authorized on those frequencies in this part of the world. So, PJ2/WK4Y was hidden to K1CRU but not to KV9U. PJ2/WK4Y should have not been willfully interfered, according to Part 97.101something... If the situation happened to be the contrary, someone should have plugged his microphone, fired up on LSB, and warned PJ2/WK4Y that the frequency was already in use in PSK, MFSK or Olivia. I am afraid that something does not fit...and not only with robots. A theory, in practice, may prove to be more complicated than the same theory, in theory. 73, Jose, CO2JA PS: Don't try to convince me of what is allowed and not, I know that the allowed modes do not match up in the States and down in the Caribbean. I am just taking adventage of the example posted. Life is certainly richer than we may imagine at a given moment. I am not looking forward to any further discussions or accusations. This is just food for thought. --- Rick wrote: I was trying to work some 40 meter digital this evening but there are stations that have some audio extending down to 7070 which makes it difficult to use digital up at 1500 up from 7071. In fact, for a while PJ2/WK4Y was operating LSB right on 7071.5 which I think would put his passband right over the PSK31/digital mode waterhole. I was calling CQ in MFSK16 and Frank, K1CRU came back to me from CT. I was only able to copy a small percentage however he was able to copy me 100% because he did not have the interference. We tried switching to Olivia 500/16 but that was worse and copy was barely 10% on my end, but again, 100% on his. I then suggested we try Domino EX 8 which is available in Ham Radio Deluxe/Digital Master 780, but was not able to copy him after that. I would like to hear opinions on other's experiences working through voice splatter? I know that MT-63 can work except that the wider versions can not work as deep in the noise as you find with modes like MFSK16. What have you found that worked and what did not work. 73, Rick, KV9U __ 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] Modes the work with SSB splatter
Clearly, the 7070 watering hole is used 24/7 by narrow PSK31 stations as long as the band is open. The contester can unfortunately use SSB voice in that part of the band. He may not have known or cared that this is about the hottest digital area on 40 meters, but of course the PSK31 stations were there first. He may have been on earlier and the propagation could have changed. But probably not as he seemed to come out of nowhere and then got no response and gave up after a while. The other stations were higher in frequency and I could not be sure of the language. It sounded like French but perhaps a Caribbean patois? Because of the type of smearing modulation from SSB, I have come to the conclusion that bandwidth is not a good way to segregate signals. The mode really does need to be taken into consideration. 73, Rick, KV9U Jose A. Amador wrote: Who showed up first? I believe that on the light of the previous discussions, PJ2/WK4Y came first, he should not have been QRM'd with PSK, MFSK or whatever, and all activity should have stopped until that spectrum chunk was cleared, as SSB is authorized on those frequencies in this part of the world. So, PJ2/WK4Y was hidden to K1CRU but not to KV9U. PJ2/WK4Y should have not been willfully interfered, according to Part 97.101something... If the situation happened to be the contrary, someone should have plugged his microphone, fired up on LSB, and warned PJ2/WK4Y that the frequency was already in use in PSK, MFSK or Olivia. I am afraid that something does not fit...and not only with robots. A theory, in practice, may prove to be more complicated than the same theory, in theory. 73, Jose, CO2JA PS: Don't try to convince me of what is allowed and not, I know that the allowed modes do not match up in the States and down in the Caribbean. I am just taking adventage of the example posted. Life is certainly richer than we may imagine at a given moment. I am not looking forward to any further discussions or accusations. This is just food for thought.
RE: [digitalradio] Modes the work with SSB splatter
Under similar conditions on 40/80m switching to OLIVIA 1000/32 works well, even with considerable overlap On the waterfall John VE5MU From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Rick Sent: Sunday, October 21, 2007 8:10 PM To: digitalradio@yahoogroups.com Subject: [digitalradio] Modes the work with SSB splatter I was trying to work some 40 meter digital this evening but there are stations that have some audio extending down to 7070 which makes it difficult to use digital up at 1500 up from 7071. In fact, for a while PJ2/WK4Y was operating LSB right on 7071.5 which I think would put his passband right over the PSK31/digital mode waterhole. I was calling CQ in MFSK16 and Frank, K1CRU came back to me from CT. I was only able to copy a small percentage however he was able to copy me 100% because he did not have the interference. We tried switching to Olivia 500/16 but that was worse and copy was barely 10% on my end, but again, 100% on his. I then suggested we try Domino EX 8 which is available in Ham Radio Deluxe/Digital Master 780, but was not able to copy him after that. I would like to hear opinions on other's experiences working through voice splatter? I know that MT-63 can work except that the wider versions can not work as deep in the noise as you find with modes like MFSK16. What have you found that worked and what did not work. 73, Rick, KV9U
