Hi,
>From 14101 to 14112 is the range legal in the IARU Regions for DIGIMODES until >2700Hz. You cannot use all the spectrum exclusive for you because spectrum is for all hamradio. OLIVIA and ROS have to share frequencies, as well as future modes that will emerge over the coming years. About that Olivia is the only mode that allows errorfree signal transfer at worse conditions,I think you're quite wrong. Best regards, Jose Alberto > From: m...@pp.inet.fi > To: nieto...@hotmail.com > Subject: ROS > Date: Mon, 1 Mar 2010 18:47:27 +0200 > > Hi Jose, > > since today I have observed the signals of your mode on 14.106.0 Mhz. > > Since 5 years we are using the frequencies 14.108,50, 14.107,50 14.105,50.... > for Olivia after we have been on different frequencies below 14.100 where > other > modes have been active. The channels for Olivia are 1000 Hz or 500 Hz wide. > > Olivia is the only mode that allows errorfree signal transfer at worse > conditions. > We have daily contacts between EU and the USA on 14.106,50 MHz. > For Olivia, channels are used not to disturb each other when you cannot hear > signals > in the noise. - When a ROS signal appears on the channels it will qrm 3 > Olivia > channels of 1000 Hz or 5 channels of 500 Hz width. > > I see a very big problem when we will have collisions between Olivia - which > is up to now > only disturbed by automatic stations - and ROS mode. From own experiences I > know that > Olivia, when a pactor signal appears which is stronger by some s-stages, will > copy errorfree. > In contrary I observed yesterday that a pactor signal of abt the same > strength as ROS > made ROS transmissions unreadable. > > You propose also a higher frequency to be used for ROS. This is a good idea > as above > 14110 MHz here in OH I see only then and when some russian ssb stations, > nothing else. > > To have fun with both modes, I strongly recommend to use NO frequencies below > 14.110 MHz > for ROS. This will avoid any aggression and any fighting between ROS and > Olivia users. > > I hope you will understand our problems, > > Best regards, M.Salzwedel, oh/dk4zc >
