Hi Patrick! This was great news! I am ready for testing form 160m to 10m . Calling on 14074 right now .
73 de LA5VNA Steinar Patrick Lindecker skrev: > > Hello all, > > I have issued a new test version of Multipsk which adds the JT65 mode > (RX/TX), for the ones interested by tests. > > This mode is interesting as it can decode very weak signals down to a > S/N=-25 dB (according to my measures and considering a reference noise > bandwidth of 3000 Hz, as for the other modes of Multipsk). > > A 4.8 Multipsk test version in a ZIP test package is available in my > site. It contains the Multipsk test version and help files + the > KVASD.EXE file. > http://f6cte.free.fr/MULTIPSK_TEST_02_03_2008.ZIP > <http://f6cte.free.fr/MULTIPSK_TEST_02_03_2008.ZIP> > > Paste this adress in your Internet Explorer or equivalent. Download > the file. > Create a tempory folder (C:\TEST, for example), unzip the file in it > and start C:\TEST\Multipsk.exe (the auxiliary files will be created > automatically). > > I propose a test in JT65A, 14074 KHz USB on the XCVR (AF about 1300 > Hz) the next saturday at 11h00 UTC. I will call CQ. > > __ > > _Important_: the transmission of a JT65 frame must begin one second > after the minute with a tolerance on +/-1 sec on the PC clock. *So it > will be necessary before beginning to do JT65, to set your PC clock to > the right time. * > > For help about JT65, click on the right button of the mouse when you > are over any button relative to JT65. You can also look at the hints > on each button. > > If you are equipped, you can also try to do EME QSO (" Earth - Moon - > Earth "), in VHF and UHF. > > TKS to report bugs and transmissions done. > > 73 > > Patrick > > ****************************************************************************************************************************************** > > Here are some information about JT65 > > __ > > _Created by_: Joseph Taylor (K1JT) in 2004 > > _ > > Description : > > _ > > Baud rate : 2,69 (11025/4096) or 0.372 second by 6 bits symbol > > Messages : a message of 46.8 seconds duration begins at t=1 sec after > the beginning of the UTC minute and lasts until t=47.8 sec (it is > necessary that the PC may be synchronised on a standard clock). It is > composed of 126 symbols, each one with a lenght of 4096 audio samples > (0.372 seconde). 63 carry a synchronization tone at 1270,5 Hz. 63 "6 > bits symbols" carry the message (allowing the Reed-Solomon coding of > 72 bits). > The 72 bits consist of (non exhaustive): > * call 1 (28 bits) + call 2 (28 bits) + 4 characters Locator (15 bits) > plus the bit 72 to inform that it is a formatted message, > * call 1 + call 2 (+ prefix or ending, example: F6CTE/P or ON/F6CTE) > plus the bit 72 to inform that it is a formatted message, > * call 1 (+ prefix or suffix, example: F6CTE/P or ON/F6CTE) + call 2 > plus the bit 72 to inform that it is a formatted message, > * CQ + call + 4 characters Locator plus the bit 72 to inform that it > is a formatted message, > * plain text: 13 characters > > Speed : 72 bits (or 13 characters maximum in plain text) by 60 sec > period (with only one message by period) or 2,2 wpm > > ................................................... > > > ------------------------------------------------------------------------ > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.21.3/1306 - Release Date: 3/1/2008 > 5:41 PM >
