Walt K5YFW wrote:
Another consideration is what would the bandwidth be with
DSB where two 350 Hz PSK modes were sent? The bandwidth
would be 770+ Hz.
...
problem is finding an ISB receiver which you would need.
Perhaps a direct conversion receiver with a Q/I (?) detector
and DSP
The bps with packet is the same as the baud rate. With other modes that
have different levels, the signalling rate (the baud rate) can have more
than one bit sent per baud.
The fastest baud rate that Pactor uses is 200 baud, but the bps rate is
many times faster with P2 and P3.
The speed of
7. While Microsoft made a passing attempt at retrofitting security
into its early operating systems, they didn't get any money for
this. So, we should be extremely grateful that they actually fixed
security problems for 8 years for Windows 98. Other companies would not
support any
- Original Message -
From: kd4e [EMAIL PROTECTED]
Unix was *always* secure and Linux flowed out of Unix
as did BSD. Unix is very old.
No way matey - I have used UNIX distributions where the username / password
was stored in plain text. I refer to Ultrix in the mid to late 1980's.
I have posted a project details for a small interface for echolink
which uses two isolation transformers 2 opto-couplers. It may be
powed from DTR pin under a script of from external supply/
kindly visit project page for details:
http://www.foxdelta.com
I hope this information may be useful
Like most things, both posters reflect truth as they see it. Perhaps the
same for me:)
Microsoft happened to be in the right place at the right time to buy an
OS from a third party to allow IBM 808x chips to at least work at a
rudimentary level. Cassette tape loading, that sort of thing at
Unix was *always* secure and Linux flowed out of Unix
as did BSD. Unix is very old.
I don't know what you're background in the computer field is, and I
don't mean to turn this into a resume review, but I've been writing
operating systems and OS-level components since, oh, 1978. Your
statement
Danny Douglas N7DC wrote:
The best use of DSB in ham radio would be for SSTV or some
such. You could have the picture on one side, and voice
talking about it on the other.
Hi Danny,
That's commonly known as ISB (Independent Side Band).
DSB, or AMSC, is commonly what you get when you
--- In digitalradio@yahoogroups.com, Simon Brown [EMAIL PROTECTED]
wrote:
No way matey - I have used UNIX distributions where the username /
password
was stored in plain text...
This is a total red herring, of course.
Triple-DES is no more secure than your newspaper cryptogram puzzle if
you
Peter G. Viscarola wrote:
Unix was *always* secure and Linux flowed out of Unix as did BSD.
Unix is very old.
I don't know what you're background in the computer field is, and I
don't mean to turn this into a resume review, but I've been writing
operating systems and OS-level components
MS has *always* lagged behind Unix, Linux, BSD, and Apple
in this area. Always. MS propaganda aside.
...
NT/2000 was a desperate attempt by MS to stem the bleeding
because everyone else's OS's were less vulnerable and it
was at-best embarassing, at worse was harming them at
server
When I get
my soundcard DLL written for VISTA I'll make the source available.
This would be great !
btw, where did you get the new sound API from ?
Paul and others,
Indeed you can generate Digital Modes as IQ components from a sound
card stereo output. I've been involved in a few successful trials.
I believe there's IQ PSK31 software about, I have an experimental
IQ version of DominoEX for use on LF, and there's a very nice IQ
output in
It's part of VISTA - can't remember what it's called but there are example
of use in the SDK.
Properly written NT/2K/XP code will still work but when running on VISTA
it's much better to use the VISTA API.
Simon Brown, HB9DRV
(GD4ELI March 2nd - 12th 2006)
- Original Message -
From:
Has anyone had any experience with the AOR digital voice modem ARD9000MK2?
I'm curious as to how well it works on hf ssb.
Bill S
Sorry Bill,
I own the ARD9800 modems, I've never used an ARD9000MK2. Although I
have read e-mails, owners seem to like the MK2 more than the older
version (the ARD9000). They also believe they are more stable / RFI
proof. Now that's just second hand hear say, so take that with a
I have been using the ARD9800 for about 4 years in the mobile.
Really can't say about the MK2.
You can see a photo of the FT-840 and DV modem mounted
in my ford F-150 pick up at
http://www.hamradio-dv.org/aor/digital-ssb/fellow-users/fellow-users-pics/w0jab/w0jab-stn.htm
John, W0JAB
At 12:26
Yes, My first AOR digital voice modem was the ARD9000 MK II. Being blind,
it was problematic for me to make sure I wasn't in the digital mode when
checking into a net and as a result was cursed out in a bar room brawler
fashion by the ncs and told not to come back on the frequency as I wasn't
But the security debate isn't simple enough to be about propaganda --
It's about history, and the evolution of the PC. And, again... I
can TELL you how it is, cuz I was there and I've *read* the code of
the operating systems we're discussing.
I'm out of this conversation,
de Peter K1PGV
So
far there's no IQ software for digital mode reception (please prove
me wrong!)
I hope so:
DREAM is IQ capable.
Start it with dream.exe -c 3 (see dream's help) and feed it with your
IQ signal. More, since dream is open-source, and dreams iq-capability is
a modular phase-shift hilbert
There was some packet activity on 29 MHz in the 90's . While I could do
a LOT of forwarding at 1200 baud
on 28.18 MHz at 1200 baud using a SSB radio, I was NEVER lucky to get a
connection at 1200 baud FM AFSK,
even when I heard some of them. SNR was too bad.
The numbers tell that such a link
Isn't that a Softrock using SDR-1000 or M0KGK software?
Jose, CO2JA
Paul L Schmidt, K9PS wrote:
For a simple transmitter, how about a sound card mode that uses the
sound card in STEREO mode with I and Q components on L and R
channels, feeding two balanced modulators, and build a
Something I never have quite understood is that in the late 90's in
Indonesia, hams have used
1200 baud satellite PSK modems on 40 meters with seemingly good results.
It has been a bit hard for me to follow that. Does anyone have a
sensible explanation
for this to be useful. I do not own such
I have not followed the whole thread but I wouldn't be too sure to
believe that
Windows flaws exist per se and are not a result of agreements with somebody
else, as some conspiracy theories state.
Just in case, it is safer to use a third party firewall, or run a
bastillized *n?x.
Jose, CO2JA
I was just looking in part 97, (regarding the legality of ISB), and
noticed something else...
In the US, even though regular NBFM is legal above 29 MHz, it's only
legal for voice. The entire 10-meter band is still split up between
RTTY/Data and Voice/Image like the rest of the HF bands..
So
I wasn't so concerned about whether it's ISB, DSB, or whatever; I was more
interested in the comment that it would make the rig easy to build. If a
simple rig were built with two balanced modulators from a quadrature RF source
(easy to do), using stereo audio with a sound card program designed
Why is that? FM is the carrier, afsk is the mode. Just as SSB is the
carrier for an AFSK signal. If you can run AFSK on SSB in the other bands,
why not 10? Does it specifically say NBFM only for voice?
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6
Danny Douglas wrote:
Why is that? FM is the carrier, afsk is the mode. Just as SSB is the
carrier for an AFSK signal. If you can run AFSK on SSB in the other bands,
why not 10? Does it specifically say NBFM only for voice?
That would be an F2D emission. Legal on frequencies where
Yeah, I know the difference just didnt put it together. I was thinking one
and talking about another. But DSB was also used, I think, with some kind
of rtty signals with one upper and one lower supperessing the carrier in the
middle. Not sure how it was done. Didnt use much of that around the
--- Danny Douglas [EMAIL PROTECTED] wrote:
Why is that? FM is the carrier, afsk is the mode.
Just as SSB is the
carrier for an AFSK signal. If you can run AFSK on
SSB in the other bands,
why not 10? Does it specifically say NBFM only for
voice?
Danny Douglas N7DC
ex WN5QMX ET2US
Don't know... I'll have to do a google search on softrock
and see what it is. If that *is* what a softrock is, I
may just have to get one to play with :)
Jose A. Amador wrote:
Isn't that a Softrock using SDR-1000 or M0KGK software?
Jose, CO2JA
Paul L Schmidt, K9PS wrote:
Now, if someone hadn't confused the regulation-by-bandwidth rulemaking
proposal by putting unrelated changes in automatic control in the same
proposal, it might have been successful. Had it been, we'd be able to be
talking to someone on SSB, and blast them a
The SoftRock is a kit, very inexpensive, with some
neat features and an incredibly talented network
of contributors joined together with the primary
developer Tony Parks, KB9YIG
Here is the SoftRock group:
http://groups.yahoo.com/group/softrock40/
doc
Paul L Schmidt, K9PS wrote:
Don't
Paul L Schmidt, K9PS wrote: If you wanted to produce a pair of PSK31
signals separated by, say, 150 Hz, with a pilot carrier between them,
it'd simply be a matter of building the appropriate waveforms to make
it happen that way.
Basically, a cheap software-defined radio, covering a small
Actually, there was quite a bit of focus on security back in the 70s
and 80s, but the topology employed for scalable computing was
vulnerable to different threats. The prevailing notion was that ever
larger CPUs would be timeshared as computing utilities by multiple
organizations. The concern
The SoftRock V6.1 two band transceiver is very expensive, it's $32 if
you can afford that much I recommend you buy one. ;}
What a deal!
At 06:19 PM 2/1/2007, you wrote:
Don't know... I'll have to do a google search on softrock
and see what it is. If that *is* what a softrock is, I
may just
Rockwells's military ARC-230 radio uses ISB to enable at least a theoretically
possible 19.2kb per second with ALE through SCOPE Command -9600 kbps per
sideband. O f course, they do not ever achieve that rate given today's sunspot
situation but it is at least a laboratory possibility. The
Right now I'm copying a QSO where the stations are using Olivia
16/500 on 80M. I'm in NW Arkansas, and the two stations in the QSO
are in Florida and Georgia. I'm getting solid copy on the Florida
station and extremely lousy copy on the Georgia station.
(Presumably they are getting good copy on
jhaynesatalumni wrote
Right now I'm copying a QSO where the stations are using Olivia
16/500 on 80M. I'm in NW Arkansas, and the two stations in the QSO
are in Florida and Georgia. I'm getting solid copy on the Florida
station and extremely lousy copy on the Georgia station.
(Presumably
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