Re: [digitalradio] Re: QRV new JT8 "mode"
søn, 20 06 2010 kl. 09:40 -0700, skrev Warren Moxley: > > > I Contacted W1XT a few minutes ago and it chops of the the last two > characters of his exchange. Has anyone see this on JT8? > > Warren / K5WGM > > > Most likely he wrote a message longer than the limit (14 chars) Vy 73 de OZ1PIF/5Q2M, Peter * ** Genius is one per cent inspiration, ** ** and ninety-nine per cent** ** perspiration. ** ** -- Thomas A. Edison ** * email: peter(no-spam filler)@frenning.dk http://www.frenning.dk/oz1pif.htm Ph. +45 4619 3239 Snailmail: Peter Frenning Ternevej 23 DK-4130 Viby Sj. Denmark *
Re: [digitalradio] Re: QRV new JT8 "mode"
I Contacted W1XT a few minutes ago and it chops of the the last two characters of his exchange. Has anyone see this on JT8? Warren / K5WGM --- On Sun, 6/20/10, Rudy Benner wrote: From: Rudy Benner Subject: Re: [digitalradio] Re: QRV new JT8 "mode" To: digitalradio@yahoogroups.com Date: Sunday, June 20, 2010, 8:16 AM I see more action on JT8 this morning. From: obrienaj Sent: Sunday, June 20, 2010 6:44 AM To: digitalradio@ yahoogroups. com Subject: [digitalradio] Re: QRV new JT8 "mode" I will be on 14076.25 with JT8 most of today TOL = 400 Andy K3UK --- In digitalradio@ yahoogroups. com, Andy obrien wrote: > > I will be QRV over night using JT8 mode. I will xmit when in shack > and "listen only" while sleeping. 7076 USB > > Andy K3UK > > > 4. Alternative Modes for EME, Microwaves, and QRP at HF > > JT8 is proposed as a possible alternative to JT4. Modulation is 8-FSK > at 2.857 baud. FEC uses convolutional codes with K=14, r=1/4, K=15, > r=1/6, or K=16, r=1/8, depending on message length. Synchronization > uses 8�8 Costas arrays at the beginning and end of a transmission, > followed by two additional symbols to distinguish between 30-bit, > 48-bit, and 78-bit messages. Total bandwidth is 23 Hz. At present, > only the 78-bit messages have been implemented. > No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.829 / Virus Database: 271.1.1/2950 - Release Date: 06/19/10 13:50:00
Re: [digitalradio] Re: QRV new JT8 "mode"
I see more action on JT8 this morning. From: obrienaj Sent: Sunday, June 20, 2010 6:44 AM To: digitalradio@yahoogroups.com Subject: [digitalradio] Re: QRV new JT8 "mode" I will be on 14076.25 with JT8 most of today TOL = 400 Andy K3UK --- In digitalradio@yahoogroups.com, Andy obrien wrote: > > I will be QRV over night using JT8 mode. I will xmit when in shack > and "listen only" while sleeping. 7076 USB > > Andy K3UK > > > 4. Alternative Modes for EME, Microwaves, and QRP at HF > > JT8 is proposed as a possible alternative to JT4. Modulation is 8-FSK > at 2.857 baud. FEC uses convolutional codes with K=14, r=1/4, K=15, > r=1/6, or K=16, r=1/8, depending on message length. Synchronization > uses 8�8 Costas arrays at the beginning and end of a transmission, > followed by two additional symbols to distinguish between 30-bit, > 48-bit, and 78-bit messages. Total bandwidth is 23 Hz. At present, > only the 78-bit messages have been implemented. > No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.829 / Virus Database: 271.1.1/2950 - Release Date: 06/19/10 13:50:00
[digitalradio] Re: QRV new JT8 "mode"
I will be on 14076.25 with JT8 most of today TOL = 400 Andy K3UK --- In digitalradio@yahoogroups.com, Andy obrien wrote: > > I will be QRV over night using JT8 mode. I will xmit when in shack > and "listen only" while sleeping. 7076 USB > > Andy K3UK > > > 4. Alternative Modes for EME, Microwaves, and QRP at HF > > JT8 is proposed as a possible alternative to JT4. Modulation is 8-FSK > at 2.857 baud. FEC uses convolutional codes with K=14, r=1/4, K=15, > r=1/6, or K=16, r=1/8, depending on message length. Synchronization > uses 8�8 Costas arrays at the beginning and end of a transmission, > followed by two additional symbols to distinguish between 30-bit, > 48-bit, and 78-bit messages. Total bandwidth is 23 Hz. At present, > only the 78-bit messages have been implemented. >
