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
