[digitalradio] Re: my thoughts about ROS (was Ros on 40m)
But the thing is, Siegfried, WSPR is limited by design to use just 200Hz of spectrum. Each individual user needs only about 6Hz of bandwidth. JT65 also uses quite a small part of the spectrum. I accept that those modes don't allow the free text contacts you are looking for, but these modes can handle the number of people who wish to use them without interfering with other users. The trouble with ROS is the amount of spectrum it requires to allow free text to be exchanged using WSPR-like power levels means that there isn't a place for it on the popular bands like 40m and 20m. ROS would be fine if it was just an experimental mode being used occasionally between a few enthusiasts. But by making a free download available to all it has become a problem for all of digital ham radio. With the number of users out there, even 3 channels won't be enough for ROS to become a widespread use mode. It is no good just designing a clever mode if you don't also consider how it will be used given the constraints that exist within the amateur bands. The question I would like to ask you, Siegfried, and any other defenders of the ROS software is this: Why should dozens of other users be pushed aside and suffer QRM just so people like you can try to make DX contacts using lower power than normal? No-one is forcing you to use such low power. Taking up excessive bandwidth in order to do so is plain selfish. If people want to make DX contacts they should use one of the existing modes and more power. It would be nice to be able to use modes like ROS but our bands simply aren't wide enough to allow everyone to do so. Why not just use PSK31 which at 30 or so Hz is narrow enough to allow dozens of simultaneous free text contacts and still does not demand huge amounts of power to work DX? Julian, G4ILO --- In digitalradio@yahoogroups.com, Siegfried Jackstien siegfried.jackst...@... wrote: Jose is then inventing the (too wide) wheel again. José's goals have been met by WSPR far and far better... No that is not correct Does wspr send keyboard to keyboard with any text at any given time with 300 signs a minute ? No wspr is different in many ways Wspr is okay for propagation tests with low power and has a fixed transmit window (in time) Ros is faster, has no timing window and no precoded messages so you can type what you want to the other not only call locator and output any text is possible faster as most of us can type
[digitalradio] Re: my thoughts about ROS (was Ros on 40m)
There is a KB to KB derivative of WSPR I believe called WSJT/JT65A but that is beside the point [that would end in a discussion on S/N ratio versus speed]. It's about a new mode that is mainly used at 2250Hz bandwidth at +8dB by it's users, and with three calling frequencies hard coded into the software, and that has a auto-beacon function... Marc, PD4U --- In digitalradio@yahoogroups.com, Siegfried Jackstien siegfried.jackst...@... wrote: Jose is then inventing the (too wide) wheel again. José's goals have been met by WSPR far and far better... No that is not correct Does wspr send keyboard to keyboard with any text at any given time with 300 signs a minute ? No wspr is different in many ways Wspr is okay for propagation tests with low power and has a fixed transmit window (in time) Ros is faster, has no timing window and no precoded messages so you can type what you want to the other not only call locator and output any text is possible faster as most of us can type
[digitalradio] Re: my thoughts about ROS (was Ros on 40m)
--- In digitalradio@yahoogroups.com, Siegfried Jackstien siegfried.jackst...@... wrote: I do not know what you and the others in the hall of shame did that made jose angry So... assume it is the other way round: José made many US radio amateurs angry [by publishing a fake FCC document and by hard coding banned call into his software]
AW: [digitalradio] Re: my thoughts about ROS (was Ros on 40m)
Agree on that ,,, ros is wide band and there is not enough room for all .. It is for long distance not for italy spain or similar And about the bandwith used: jose is working on the soft to make more than just one conversation on a given channel possible But that is not done yet so for the first tests we have to live with what we have (or make suggestions by mail or in the group) Ros is not ready ,,, it is beta and it will be till most work is done. For me it was first digitsl contact with vk land . I have no beam and no pa . so for me it is the right mode for vk or zl I just monitor most of the time and if I see a nice long distance call I try my luck Other use the software for uk italy or spain france etc . that is not the right way For that short hops psk is much better (multichannel decoding in panoramic view and lower used bandwith etc,) But for stations that have only low power and a low gain antenna ros can be very good to get that last missing land And as everybody knows ros is brand new . do you remember when new things were invented ? There were everytime people against new things .. Greetz Sigi
[digitalradio] Re: my thoughts about ROS (was Ros on 40m)
Well, I can't speak for everyone but I am against it, not because it is new, but because it is impractical for a mode that wide to be commonly used on the busy bands. And because of the way it has been introduced and the attitude of the developer in banning users he doesn't like which is not within the spirit of the hobby. There are plenty of other good modes that let you work DX with low power and don't take up as much spectrum space, e.g. Olivia. Unfortunately it is a few years old so not new and cool etc. I doubt if the difference between ROS and Olivia is worth all the trouble and bad feeling ROS is causing. Julian, G4ILO --- In digitalradio@yahoogroups.com, Siegfried Jackstien siegfried.jackst...@... wrote: And as everybody knows ros is brand new . do you remember when new things were invented ? There were everytime people against new things .. Greetz Sigi
