Last night John, N3WT, and I had a PAX Q on 30 meters. The mode is very similar to using HF packet. It is fairly slow and would not work well for casual chatting, but I can see where it might be useful for a connected mode for messaging.
When we did use unproto, you do have to be careful about when to transmit since you can easily double with each other. You don't have as much control with when the rig is keyed, since it sends in set blocks so it is easy to unintentionally TX over the other station. You can adjust the block size manually within limits. If in ARQ mode, it is not as fast, but if you do double, it just retransmits. The S/N ratio was only +1 to +3 on my end although he was showing +10. He is in MD and I am in SW Wisconsin. If this had been an HF packet connection, I am doubtful that there would have been and throughput but I have not been in connected mode that much with HF packet since it is an inappropriate baud rate for HF except under the very best of conditions. The main point of all this is that ARQ modes can and do work on conventional PC computers with sound cards at the weaker signal levels. For example, the SCAMP mode that is being developed for Winlink 2000 (and will be eventually be released under the GPL according to the author), works faster than Pactor II but does require a bandwidth similar to Pactor III. Unfortunately, it can not operate at the current protocols with a signal much under a 10 db S/N ratio. (When it does work, it is stunning to see it move traffic). But with other fall back positions, albeit slow, I am heartened that we will see some sound card solutions coming for serious digital connected modes. 73, Rick, KV9U -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.4/176 - Release Date: 11/20/2005 ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Need a Digital mode QSO? Connect to telnet://208.15.25.196/ Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ Looking for digital mode software? This group suggests you try either : http://www.mixw.net MIWX (many modes) http://f6cte.free.fr MultiPSK (many modes) http://www.dxlab.com DXLAB (logging, PSK31/63 and more) http://www.qsl.net/hamscope Hamscope (many modes) http://http://xoomer.virgilio.it/aporcino/Chip64 Chip64 http://www.digipan.net/Digipan Digipan (PSK31 and PSK63 http://www.kc4elo.com/ Logger32 (logging, PSK31/63 and RTTY) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> 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/
