Warren,

Please allow me put my two cents. I would not expect so if the spreading code is the same.

The adventage of CDMA is code orthogonality, each user has a different chipping code that has little correlation with other user's codes., and so, there is little mutual QRM.

As far as I have seen, ROS uses a 3 kHz fixed bandwidth, irrespective of signalling speed. ROS 16 is affected by packet, pactor 2 and other ROS users QRM,
printing only garbage in such cases.

ROS 16 looks good on a clear channel, but crumbles under QRM. Not to be surprising when confined to just 3 kHz. Anyone can figure out just by listening on 14101.

Perhaps ROS 1 fares better, but so far I can't tell.

To me, so far, Olivia is the toughest chat mode, and includes a lot (perhaps, too much!) flexibility. Likewise, JT65A if you want to "squeeze QSO's out of thin air", but is hardly conversational at all. You can, in very short sentences (believe it is 13 characters), but you lose the adventage of some special hard coded short hand sentences (RRR, RO, 73 and such). Not a big penalty, but nevertheless, a penalty.

73,

Jose, CO2JA


El 26/02/2010 01:42 p.m., Warren Moxley escribió:
Hi Skip,

Does ROS have any flexibility like Olivia where you can change the Bandwidth? I am thinking it must not. SS modes that we all have experience with ( Cells, WiFi, etc ) seem to work well on top of each other and seem not to interfere with each other (for the most part). I was wondering if several hams using ROS that are one top of each other, does it work better than say, Olivia?

Warren - K5WGM



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