On 08/14/2010 02:15 PM, g4ilo wrote:
Well, that isn't my experience. Regardless of the chip set used, it's the
entire product including the drivers that will determine the performance.
My suspicion is that these devices run at a fixed sampling rate, and that
resampling to the rate requested
On 08/11/2010 04:04 PM, graham787 wrote:
Looks like theRDX-150-EF has been dropped
any ideas on a 'good' usb card for data use ??
I'm having great luck with the Cmedia cm108 usb soundcard.
The Asterisk (VOIP) people have even written up instructions
on how to create a PTT circuit
On 08/13/2010 07:08 PM, Andy obrien wrote:
WE9XLQ us not a valid USA callsign
It may not be a ham callsign, but it is a valid callsign...
EXPERIMENTAL SPECIAL TEMPORARY AUTHORIZATION
CLASS of Station XD FX
EMISSION Designator SK25J2D
Experition 3:00 AM EST Jan 31 2011.
Call Sign WE9XLQ
--
On 08/03/2010 09:18 PM, Andy obrien wrote:
On 10M tonight, from Mexico
See attached, the image around 500 Hz is his MAIN signal with LOTS of
side bars, and the image around 1700 Hz is also him !
He had the trifecta:
1) sidebars around his main signal
2) second and third harmonic of his
On 07/10/2010 04:56 PM, raf3151019 wrote:
Well, would you believe it ! So what happens now ?
The first person who warns the ROS users gets banned
for life from the ROS email list? :)
--
All rights reversed.
On 06/06/2010 10:48 AM, John Becker, WØJAB wrote:
At 03:22 AM 6/6/2010, you wrote: (in part)
In the end, systems like ROS, Clover, PACKTOR-XXX, etc, where there is not
full published trasparency in the encoding process, are not suitable for
legal amateur use, in my humble opinion.
In other
On 06/05/2010 03:24 PM, Jeremy Cowgar wrote:
Do you have any ideas? It's just $10, but I'd really like to have a
dedicated sound card for the ham stuff, and please do not suggest a
Signalink as I already have a nice setup,
I know your problem - the sound card's too expensive :)
I got a
On 06/02/2010 12:15 PM, Steinar Aanesland wrote:
let's forget about this Mr. Ros without manners and his new a Yahoo list.
There is a lot of decent programmers out there, making excellent HAM
software. Mr. Ros is not worth the attention he and he's
frequency-hopping spread spectrum software
On 03/04/2010 09:10 PM, pd4u_dares wrote:
All wouldn't have happened if it was not claimed by some that ROS is illegaal
in the US. Since there is no official publication on this by the FCC, ROS is
neither legal nor illegal. So the first claim by some users of ROS was in
error. Jose's
On 03/04/2010 07:44 AM, g4ilo wrote:
I thought you were in Region 2. I have the Region 2 band plan in front of me
right off the IARU site and it definitely says All Modes in all of the
sections right up to 14.350. I don't see any division at 14.150 at all. In
any case, I don't think you'd
On 03/04/2010 02:02 PM, Alan wrote:
http://www.arrl.org/news/stories/2010/03/04/11377/?nc=1
So we can forget about here in the US...too bad it looked really nice...73,
Alan
I don't read it like that.
The FCC just says that:
1) spread spectrum is not allowed on HF, and
2) The Commission does
On 02/22/2010 09:09 PM, Dave 'Doc' Corio wrote:
However, there is one thing the tuner will NOT do. It will not remember
any band or frequency, until the transmitter is keyed.
For example: I operate CW on 14.035 for a period of time. I then have a
CW sked on 18.075. After the sked I move back
On 02/23/2010 06:14 PM, jose alberto nieto ros wrote:
John, the only person in the world who know what is ROS is the person
who have created it. And the creator say that ROS is a FSK of 144 tones
with a Viterbi FEC Coder and a header of synchronization.
Last week, you said that ROS was spread
On 02/23/2010 03:26 PM, ocypret wrote:
So what's the consensus, is ROS legal in the US or not?
There's a few things we all agree on:
1) The legality of a mode depends on the technical details
of that mode, not on what the author calls the mode.
2) The FCC's lawyers are the definite
On 02/23/2010 09:00 PM, KH6TY wrote:
The distinguishing characteristic of spread spectrum is spreading by a
code INDEPENDENT of the data. FM for example, creates carriers depending
upon the audio frequency and amplitude. SSB creates carriers at a
frequency dependent upon the tone frequency,
On 02/23/2010 10:22 PM, John B. Stephensen wrote:
These modes use interleaving and randomize data values by
exclusive-ORing with a pseudorandom binary sequence. The methods are
used in most commerial products and the FCC and NSA know how to monitor
the signals.
However, this does result in
On 02/23/2010 10:50 PM, John B. Stephensen wrote:
The problem is that he said that ROS uses FHSS in the documentation. If
the final version doesn't use FHSS, DSSS or any other form of SS and a
technical specification is published the FCC will have no objection.
Oh, agreed. For the moment I
On 02/21/2010 02:17 PM, w2xj wrote:
Part 97 technical standards mostly harmonize US rules with ITU
international treaties They are written to be quite broad in order to
permit experimentation. So long as the coding technique is public and
can be received by anyone, the real restriction is
On 02/21/2010 02:17 PM, w2xj wrote:
I have spent the last hour looking through part 97. I find nothing that
would prohibit ROS in the HF bands subject to adhering to those segments
where the bandwidth is allowed. In fact the rules would appear to
support such operation:
Lets look at it in
On 02/21/2010 04:16 PM, KH6TY wrote:
Did you see the recent post by K3DCW?
The closest you get to a true definition in Part 97 is in section 97.3
Definitions, Para C, line 8:
/(8) SS/. Spread-spectrum emissions using bandwidth-expansion
modulation emissions having designators
On 02/21/2010 04:48 PM, expeditionradio wrote:
§97.305(c) is a chart of amateur radio bands
and sub-bands. Each sub-band has a note,
and the notes are listed in part §97.307.
The Note # (2) only applies a soft bandwidth
limit to non-phone emissions within the
Phone,image sub-bands.
Note
On 02/21/2010 02:36 PM, athosj wrote:
This is the way that an argument is conducted with real facts.
If ROS is a SS can not be used in HF bands.
Furthermore, if you believe that ROS is spread spectrum,
you should probably also stop using any other modes with
the same technical
On 02/21/2010 11:31 AM, J. Moen wrote:
But right now, I think that since Part 97 does not appear to define what
SS is, it is not possible to definitively say whether ROS is legal or
not legal in FCC jurisdictions. Asking FCC for an opinion is a great idea.
Of course, there is always the
On 12/15/2009 12:55 PM, Gary wrote:
I thought I'd run something up the flagpole and see if anyone salutes:
I would imagine, the license limitations would have to state something like a
maximum of 300 baud and 500 Hz bandwidth with a 200 watt power limit. There
may be other limitations that
aswoodhull wrote:
It's not like the frequency is never available for other uses. The W1AW code
transmissions are on a regular schedule, at most 7 hours a day during
weekdays (6 hours on Monday, none at all on weekends and holidays). So if you
happen to be rock bound on this frequency you
theophilusofgenoa wrote:
I would like to put in a few words in defense of the ARRL.
They deserve it, IMHO. It turns out that W1AW has been looking for
alternative 80m cw frequencies for a while now. We just did not
know about it.
I do question why this frequency was used as the primary PSK31
Cortland Richmond wrote:
Sound card users' preference for bandwidth wide enough to receive fifty or
more signals is what makes us vulnerable. W1AW does NOT wipe out the 80m
psk31 sub-band; its CW signal occupies perhaps 50-100 Hz. Use a narrow
filter, and a front-end able to handle nearby
Charles Brabham wrote:
There are no Considerate Operators associated with the ARRL, at least
not at ARRL HQ. - They apparently do not read and understand their own
publications.
W1AW has QSY'd before. For example, their 160m frequency
was changed from 1817.5 to 1802.5 kHz earlier this
Rik van Riel wrote:
Due to an unfortunate coincidence, W1AW's CW broadcasts pretty
much wipe out the 80m psk31 sub-band for a significant fraction
of the time.
I have received a reply from W1AW, which I have posted
on my web page:
http://surriel.com/radio/w1aw-psk-interference#comment-240
Brian Lloyd wrote:
1. Turn off your AGC and go with manual RF gain control. Most rigs
have enough dynamic range to be able to deal with W1AW's signal at
full gain without AGC so it would just be a really strong signal in
the passband. With AGC off W1AW would not reduce the gain for the
other
-interference
Original Message
Subject: W1AW and 80m psk31 interference
Date: Tue, 22 Sep 2009 00:04:58 -0400
From: Rik van Riel
To: w1aw
To whom it may concern,
The W1AW broadcasts are a great tradition and a help to some
amateur radio operators, and do not seem to be in the way
Patrick Lindecker wrote:
As a thumb rule:
For a same sub mode: Contestia has a double speed (+3 dB) but only 1.5
dB of loss in term of minimum S/N compared to Olivia. So it seems to be
a better compromise.
Assuming that the S/N is constant. In practice the
S/N seems to vary wildly from
Rodney wrote:
NBEMS - Narrow Band Emergency Messaging System
Is anyone familiar with this mode? What type of equipment is needed?
I have another question along these lines.
How is it used?
How does the ham community coordinate what frequencies
are used for emergency messages?
Dave wrote:
There is no NIC, however it does have two USB ports. I have a USB interface
that connects to my cable modem, but it doesn't have a Linux driver available
for it. Can anyone guess if it will work? It's a Linksys model USB10T
I'm trying to locate additional memory for the
Marc PD4U wrote:
But is the solar minimum the (only necessary and sufficient) explaining
factor for a global cooling?
As we say in Holland One swallow doesn't make it summer meaning: one
cannot 'jump to conclusions' based on unsufficient data, and beside that
the swallow is not the
Peter Frenning [OZ1PIF] wrote:
And of cause the classical question from those of us who live in a
Micro$oft-free zone: Will there be a Linux version?
Or, better yet, documentation of the JT65 modulation
schemes, so JT65* can be added to existing radio
programs like fldigi.
--
All rights
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