Russell,
Here is a screen shot of Olivia 32-1000, which is also a FSK mode.
Notice the pattern at idle and in the middle, where I send six "N"'s.
There is a repetitions pattern, just like in MFSK16, but wider.
http://home.comcast.net/~hteller/OLIVIA32-1000.JPG
What is apparently missing from ROS is any pattern at idle, which I
assume means that the frequencies are generated randomly, and
independently, and not by the data as in MFSK16 or Olivia 32-1000. In
other words, the data is probably applied to each tone wherever it
happens to be at the time.
I hope I interpret this correctly. Maybe someone else has a different
interpretation.
73 - Skip KH6TY
Russell Blair wrote:
If ROS is Multi FSK now, than WHY and WHAT was the intent to call it
(SS) Spread Spectrum?, even as the FCC inplyed that the owner (Jose
Albert Nieto)called it (SS). As much as I would like to use it and
knowing that the FCC will not show up at my door, but they might send
me a letter and ask me why and to show cause why.
How that ROS has been labeled as SS, and all the others that might
have use ROS is standing back just not knowing what to do it best just
to now do anything yet.
Russell NC5O
1- Whoever said nothing is impossible never tried slamming a revolving
door!
2- A government big enough to give you everything you want, is strong
enough to take everything you have.
- Thomas Jefferson
" IN GOD WE TRUST "
Russell Blair (NC5O)
Skype-Russell.Blair
Hell Field #300
DRCC #55
30m Dig-group #693
------------------------------------------------------------------------
*From:* jose alberto nieto ros <nietoro...@yahoo.es>
*To:* digitalradio@yahoogroups.com
*Sent:* Thu, February 25, 2010 6:36:59 PM
*Subject:* Re: AW: [digitalradio] The FCC's definition of Spread Spectrum
In fact, ROS is a Multi FSK, like many other modes.
------------------------------------------------------------------------
*De:* Siegfried Jackstien <siegfried.jackstien @freenet. de>
*Para:* digitalradio@ yahoogroups. com
*Enviado:* vie,26 febrero, 2010 01:29
*Asunto:* AW: [digitalradio] The FCC's definition of Spread Spectrum
Bw lower as 3kc and fsk … like many other modes
That is what i think
So legal where 3kc wide/digital is legal so out of cw portion but in
the digiarea
Dg9bfc
Sigi
At a given time if you make a snapshot there is only one tone so bw at
a given short time in lower as 500hz
So it is narrow in a short period of time ;-) should be legal anywhere
My thoughts is all modes should be legal in any band cause hamradio is
experimental!
------------------------------------------------------------------------
*Von:* digitalradio@ yahoogroups. com [mailto: digitalradio@
yahoogroups. com ] *Im Auftrag von *max d
*Gesendet:* Donnerstag, 25. Februar 2010 20:53
*An:* digitalradio@ yahoogroups. com
*Betreff:* [digitalradio] The FCC's definition of Spread Spectrum
Part 97.3 "Definitions" defines: "SS. Spread-spectrum emissions using
bandwidth-expansion modulation emissions having designators with A, C,
D, F, G, H, J or R as the first symbol; X as the second symbol; X as
the third symbol. "
Title 47 Sec. 2.201 is the relevant section formally defining these
symbols. It can be found on the ARRL website.
For a signal to be officially considered Spread Spectrum by the FCC,
it would have to meet a very specific description, or maybe I should
say it should not meet the other specific definitions of emissions.
After my reading of 2.201, I don't think that ROS or Chip64 could be
"officially" defined as Spread Spectrum.
And, the response from the FCC doesn't provide any FCC position or
interpretation of ROS, and further says "The Commission does not
determine if a particular mode "truly" represents spread spectrum as
it is defined in the rules."
Just my thoughts,
Max
NN5L
