Jeff, Pactor and Pactor 2 both fit fairly well in a 500 Hz bandwidth. When Pactor stations first connect (P, P2, or P3), they must be in the lowest common denominator of Pactor. The machines negotiate with each other and if it is determined that there is a P2 or a P3 station on both sides, they switch to that mode.
When two P3 stations switch from Pactor, their bandwidth increases dramatically. Since these modems will transmit no matter what is in their passband, they will go right over the top of other stations. When the FCC first allowed this kind of operation, it was with the understanding that these modes would come up with improved listening abilities and follow the standard Part 97 mandates. This is not happening and in fact, the Winlink 2000 administrator has actually openly said to not use protection for other stations because he claims that malicious operators would prevent Winlink 2000 from operating. It has become the largest interference issue on the HF RTTY/Data bands. If this is allowed, then other groups will likely increase similar activities with their systems. The FCC has received rather large numbers of requests for information on this issue but have not really responded yet. From my perspective, any group should be allowed to use whatever equipment they want on the ham bands, provided that they ID so that anyone can determine who they are, and that they are not obscuring the information and it can at least be monitored by anyone with similar equipment. Winlink 2000 does have some problems with respect to those perspectives of mine (and probably most hams). 73, Rick, KV9U Jeff Moore wrote: > What I found even more interesting than the article on QRZ was the > comments on it. To a "T" everyone commented that it was good that > WINLINK2000 was now being used on MARS freqs instead of the amateur bands. > > Not having much experience with Pactor and WL2K, I wasn't aware that > there were bandwidth issues associated with the WL2K system. > > Is this as big an issue as it appears to be? > > I'm personally more concerned with the expensive proprietary nature of > the Pactor modes and the standardization on it by the WL2K proponents. > > Any comments?? > > Jeff Moore > KE7ACY > Deschutes County ARES > Bend, Oregon > Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Check our other Yahoo Groups.... http://groups.yahoo.com/group/dxlist/ http://groups.yahoo.com/group/contesting http://groups.yahoo.com/group/themixwgroup Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> 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/
