[digitalradio] Re: Question on bandwidth on HF
Which mode within the WSJT8 Suite? Bill N9DSJ
Re: [digitalradio] Re: Question on bandwidth on HF (n9dsj)
Bill, Tnx for the responce to my question, I was running WSJT8 (ISCAT) on 14076 and I had a station tell me that that mode exceeded the bandwidth on HF, well after looking at the Doctumation its only 1.5K and looking at (Contestia, MT63 and Olivia) all can go up to 2K, So is ISCAT to wide? or was it I was just on the wrong part of 20m. Is it onlt to be used on 6m?. Russell NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Gerald Ford IN GOD WE TRUST Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693 Digital Mode Club #03198 From: n9dsj n9...@comcast.net To: digitalradio@yahoogroups.com Sent: Thu, July 22, 2010 10:54:29 AM Subject: [digitalradio] Re: Question on bandwidth on HF Which mode within the WSJT8 Suite? Bill N9DSJ
[digitalradio] Re: Question on bandwidth on HF (n9dsj)
Hi Russell, Not sure (I am not the lawyer in my family:) but suspect due to its signal rate it is legal. I asked the question on the HF JT65 board but no definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and the bandwidth 2250 Hz. You are correct that it may be more of an issue as to where in the band you were transmitting more so than the legality of its usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I have only previously seen it used on 6 meters and above. Of course some people simply do not like the wider modes in general, hence the inevitable controversy. 73, Bill N9DSJ --- In digitalradio@yahoogroups.com, Russell Blair russell_blai...@... wrote: Bill, Tnx for the responce to my question, I was running WSJT8 (ISCAT) on 14076 and I had a station tell me that that mode exceeded the bandwidth on HF, well after looking at the Doctumation its only 1.5K and looking at (Contestia, MT63 and Olivia) all can go up to 2K, So is ISCAT to wide? or was it I was just on the wrong part of 20m. Is it onlt to be used on 6m?. Russell NC5O Â 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Gerald Ford IN GOD WE TRUST Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693 Digital Mode Club #03198 From: n9dsj n9...@... To: digitalradio@yahoogroups.com Sent: Thu, July 22, 2010 10:54:29 AM Subject: [digitalradio] Re: Question on bandwidth on HF Â Which mode within the WSJT8 Suite? Bill N9DSJ
Re: [digitalradio] Re: Question on bandwidth on HF (n9dsj)
JTMS is 1500 BPS? Could it exceed the 300 baud limit on a single carrier, like PSK500 does? That wouldn't strictly be a B/W issue, but it would be a rule violation on HF. -- Dave Sparks -- AF6AS - Original Message - From: n9dsj n9...@comcast.net To: digitalradio@yahoogroups.com Sent: Thursday, July 22, 2010 4:26 PM Subject: [digitalradio] Re: Question on bandwidth on HF (n9dsj) Hi Russell, Not sure (I am not the lawyer in my family:) but suspect due to its signal rate it is legal. I asked the question on the HF JT65 board but no definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and the bandwidth 2250 Hz. You are correct that it may be more of an issue as to where in the band you were transmitting more so than the legality of its usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I have only previously seen it used on 6 meters and above. Of course some people simply do not like the wider modes in general, hence the inevitable controversy. 73, Bill N9DSJ
Re: [digitalradio] Re: Question on bandwidth on HF (n9dsj)
Tnx Bill, and for the QSO on 17m jt65a, well When I use up the 1500Hz at 14076 I could see it not going over well, but just ask me to move that I'm use all of the bandwidth for jt65a, but to say it exceeds the bandwidth for HF, just ask me to move thats all. I can handle that. Thanks Bill Russell NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Gerald Ford IN GOD WE TRUST Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693 Digital Mode Club #03198 From: n9dsj n9...@comcast.net To: digitalradio@yahoogroups.com Sent: Thu, July 22, 2010 6:26:55 PM Subject: [digitalradio] Re: Question on bandwidth on HF (n9dsj) Hi Russell, Not sure (I am not the lawyer in my family:) but suspect due to its signal rate it is legal. I asked the question on the HF JT65 board but no definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and the bandwidth 2250 Hz. You are correct that it may be more of an issue as to where in the band you were transmitting more so than the legality of its usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I have only previously seen it used on 6 meters and above. Of course some people simply do not like the wider modes in general, hence the inevitable controversy. 73, Bill N9DSJ --- In digitalradio@yahoogroups.com, Russell Blair russell_blai...@... wrote: Bill, Tnx for the responce to my question, I was running WSJT8 (ISCAT) on 14076 and I had a station tell me that that mode exceeded the bandwidth on HF, well after looking at the Doctumation its only 1.5K and looking at (Contestia, MT63 and Olivia) all can go up to 2K, So is ISCAT to wide? or was it I was just on the wrong part of 20m. Is it onlt to be used on 6m?. Russell NC5O Â 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Gerald Ford IN GOD WE TRUST Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693 Digital Mode Club #03198 From: n9dsj n9...@... To: digitalradio@yahoogroups.com Sent: Thu, July 22, 2010 10:54:29 AM Subject: [digitalradio] Re: Question on bandwidth on HF Â Which mode within the WSJT8 Suite? Bill N9DSJ
[digitalradio] Re: Question on bandwidth on HF (n9dsj)
Yes, it is why I included its specification and mentioned signal rate :) I have never heard JTMS on HF, btw.. 73, Bill N9DSJ --- In digitalradio@yahoogroups.com, Dave Sparks dspa...@... wrote: JTMS is 1500 BPS? Could it exceed the 300 baud limit on a single carrier, like PSK500 does? That wouldn't strictly be a B/W issue, but it would be a rule violation on HF. -- Dave Sparks -- AF6AS - Original Message - From: n9dsj n9...@... To: digitalradio@yahoogroups.com Sent: Thursday, July 22, 2010 4:26 PM Subject: [digitalradio] Re: Question on bandwidth on HF (n9dsj) Hi Russell, Not sure (I am not the lawyer in my family:) but suspect due to its signal rate it is legal. I asked the question on the HF JT65 board but no definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and the bandwidth 2250 Hz. You are correct that it may be more of an issue as to where in the band you were transmitting more so than the legality of its usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I have only previously seen it used on 6 meters and above. Of course some people simply do not like the wider modes in general, hence the inevitable controversy. 73, Bill N9DSJ
Re: [digitalradio] Re: Question on bandwidth on HF (n9dsj)
Tnx Dave, I will keep that in mine. Thanks Russ NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Gerald Ford IN GOD WE TRUST Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693 Digital Mode Club #03198 From: Dave Sparks dspa...@pobox.com To: digitalradio@yahoogroups.com Sent: Thu, July 22, 2010 6:41:35 PM Subject: Re: [digitalradio] Re: Question on bandwidth on HF (n9dsj) JTMS is 1500 BPS? Could it exceed the 300 baud limit on a single carrier, like PSK500 does? That wouldn't strictly be a B/W issue, but it would be a rule violation on HF. -- Dave Sparks -- AF6AS - Original Message - From: n9dsj n9...@comcast.net To: digitalradio@yahoogroups.com Sent: Thursday, July 22, 2010 4:26 PM Subject: [digitalradio] Re: Question on bandwidth on HF (n9dsj) Hi Russell, Not sure (I am not the lawyer in my family:) but suspect due to its signal rate it is legal. I asked the question on the HF JT65 board but no definitive response. ISCAT is 23 baud at 1500 Hz and JTMS is 1500 bps and the bandwidth 2250 Hz. You are correct that it may be more of an issue as to where in the band you were transmitting more so than the legality of its usage. I am not sure of the advantage of ISCAT on HF, aside from perhaps on a scatter path to 10/12 meters and it is down 10 dB or so in sensitivity from JT65/JT8/JT2/JT4 modes; albeit uses a 30 second sequence like JT6M. I have only previously seen it used on 6 meters and above. Of course some people simply do not like the wider modes in general, hence the inevitable controversy. 73, Bill N9DSJ
