Thanks Julian I can also see by http://aintel.bi.ehu.es/psk31theory.html that this PSK-31 waveform is a bit more complicated at keying than simple fsk on/off digital 1's and 0's.
You mentioned an interesting aspect of the serial converter that is confusing for me: "whether the USB serial ports most people would want to use are capable of working at the nonstandard baud rates such modes would require. Under Windows you would probably have to fight with the system to get access to the serial ports and set these nonstandard UART parameters, making the task much more difficult than it was in 1986 when I wrote my own MS-DOS RTTY terminal program. " I purchased an old Belkin usb-serial converter that was recommended as being capable of running at 45.5 baud from the RTTY info web page. < http://www.aa5au.com/gettingstarted/rtty_start8.htm > Then I discovered that I did not have to use the "Tx Data" (which I believe is controlled thru the USART), I could have keyed the DTR or RTS control line at 45.5 baud thru the EXT FSK dll. Would not the baud rate of that control pin be controlled by the MMTTY/Ext FSK software, independant of USART standard buad rates? When I used a "run of the mill" usb-serial converter in the DTR or DTS, it seemed as though it keyed just fine, i.e. I heard the diddle and fsk in the K3 "monitor". I am using Xp on a Vostro laptop. I use a serial adapter to tune the K3, and a second adapter to FSK thru an opto isolator. I suspect that all the "Mixw type keyers" have somehow solved that problem.. I continued this post because I figured it may be of interest to other FSK Rtty folks. Thanks again. Dick WB7OND < -- View this message in context: http://www.nabble.com/K3-PSK-D-tp18153773p18159902.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
