Hi Skip
I have been monitoring a ROS idling over time using DL4YHF's Spectrum
Lab. Here is the results.You can clearly see a pattern
73 de LA5VNA Steinar
On 26.02.2010 12:29, KH6TY wrote:
Alan,
Of course, the FCC rules on SS are outdated and ROS should be allowed
due to its narrow
Humm, I seems to have trouble with the attachment.
I hope you get this :
http://xa.yimg.com/kq/groups/1871183/sn/1267152391/name/ROS.jpg
73 de LA5VNA Steinar
And it clearly repeat it self
http://home.broadpark.no/~saanes/bilder/ROS2.jpg
73 de LA5VNA Steinar
On 27.02.2010 10:58, Steinar Aanesland wrote:
Humm, I seems to have trouble with the attachment.
I hope you get this :
http://xa.yimg.com/kq/groups/1871183/sn/1267152391/name/ROS.jpg
That's a good analysis, Steinar. Is it possible to see if the pattern
changes when sending data? That is all the FCC is concerned about. The
pattern has to change when sending data and not just remain the same to
exclude it from being FHSS.
73 - Skip KH6TY
Steinar Aanesland wrote:
On Tuesday 23 February 2010 11:27:21 you wrote:
James, you will not have to LOOK. This contest will bring out thousabds of
RTTY ops and 80-40-20-15-10 will be full if those bands are open. The
ARRL band plan will be where you find them, but some operators will go
higher,
Andy K3UK
SS uses pseudorandom codes to wag the carrier(s).
EVERY pseudorandom code is repetitive, the length may vary.
73,
Rein PA0R
--- In digitalradio@yahoogroups.com, KH6TY kh...@... wrote:
That's a good analysis, Steinar. Is it possible to see if the pattern
changes when sending data? That is
Thanks for the clarification, Rein.
That agrees with what Steinar sees, and with the Wikipedia discussion,
which says in part, Most pseudorandom generator algorithms produce
sequences which are uniformly distributed
/wiki/Uniform_distribution_%28discrete%29 by any of several tests. It
is an
I want to embark on a campaign to make RSID de rigueur, for Olivia. It is
nice to see Olivia continue to be used as a mode , a very effective mode.
However, Olivia users need to remind themselves that there are 10 common sets
tones/bw, and despite their appearance in a waterfall, it is
Hi Skip
Here is the new ROS signal. It is idling with two gruops of 25 sec of
X's . As you can see the pattern change when sending data.
http://home.broadpark.no/~saanes/bilder/ROS_X_2.JPG
73 de LA5VNA Steinar
On 27.02.2010 13:19, KH6TY wrote:
That's a good analysis, Steinar. Is it
Looks like good news Steinar! If the data changes the frequencies, it
does not qualify as FHSS as Jose originally claimed. I am sure the FCC
will find the same during their tests and expect them to say it can be
used on HF and VHF. I am especially interested in being able to use the
1 baud
This thread now appears to confirm what Jose and a few others have claimed
.That ROS has some characteristics of Spread Spectrum and frequency hopping,
but does not meet the definition that the FCC has implied when not allowing
Spread Spectrum in the USA. The hams involved in this thread
KH6TY wrote:
Looks like good news Steinar! If the data changes the frequencies, it
does not qualify as FHSS as Jose originally claimed. I am sure the FCC
will find the same during their tests and expect them to say it can be
used on HF and VHF.
When they do, please let me know so that I
http://www.obriensweb.com/hrdsdr.jpg
FYI, SDR-IQ,, TS2000, SpectraVue, HRD, DM780 all fully sync'd and interfaced.
Andy K3UK
Hi Skip
First , I have read all of your mail's and I think you have argued fair
and square.
I can't tell if ROS is FHSS or not . This is to complicate for a country
boy like me, but I really hope that FCC will let you use narrow band
SS on HF some day .
Cross my fingers for you and 73
LA5VNA
Agreed, it is handy for all digi modes.except psk31..why do people
insist on using RSID for modes we all know?
It gets damned annoying seeing little boxes popping up on my screen to tell me
it has heard a psk31 signal.Qpsk even i could accept, but psk31 using
rsid for psk31 is just
Gavin, what software are u using ? Mine (Multipsk) can be set to allow RS ID
by modes... I can exclude BPSK31 RS ID alerts.
Andy K3UK
--- In digitalradio@yahoogroups.com, Gavin g0...@... wrote:
Agreed, it is handy for all digi modes.except psk31..why do people
insist on using
A new technical description was published so you should see what it describes
-- fixed start and stop sequences using 16 tones with convolutionally coded
data using 128 tones in between.
73,
John
KD6OZH
- Original Message -
From: Steinar Aanesland
To:
The FCC will say that it up to each licensee to check the legality by reading
the new technical specification. Unless someone shows that the spectrum doesn't
match the specification U.S.hams should feel safe using ROS.
73,
John
KD6OZH
- Original Message -
From: Dave Ackrill
I avoided most of the discussion in the last week or so but finally decided
to see what the ARRL Handbook had to say. At first I thought it was totally
unhelpful but after it sank in a bit found it some help.
What I gleaned is that many digital modes use spectrum spreading techniques.
The
I was just listening on 80M - some kind of RTTY contest is on - and
I hear a bunch of normal-sounding FSK RTTY signals, and some that
are awfully clicky, like key clicks except it's FSK. I wonder what
those guys are doing wrong. Having the speech processor turned on,
perhaps? Or too-rapid
Text deleted for a very good reason...
And some complained about pactor. Or Amtor.
John, W0JAB
Chapter 8 of the 2010 handbook has a short overview of spread-spectrum
techniques that could be applied to either analog or digital modulation. The
original signal cold be anything (BPSK, FSK, FM...) and is phase or frequency
modulated by a pseudorandom sequence in order to spread the signal
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