OFDM squeezes more carriers into
the same space by making the carriers orthogonal
to their next door neighbors.
Its not only the next door neighbors but ALL the carriers.
If you look at the the ofdm signal with a correctly timed FFT with
exactly a symbol time length, there is NO overlap of
Nope - Ill be over on the original digital mode, STRAIGHT KEY NIGHT. Too
many contests at the same time detract from each other.
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
.
QSL LOTW-buro- direct
As courtesty I upload to eQSL but if you
Most do not use the mode. Some of us do, and noted what you said, but had
no comment. If we see/read the beacon , we will let you know. Not
responding to an email doesnt mean one has no interest.
Danny Douglas N7DC
ex WN5QMX ET2US WA5UKR ET3USA
SV0WPP VS6DD N7DC/YV5 G5CTB all
DX 2-6 years each
Hi,
You can download the latest the software from my web side
http://home.broadpark.no/~saanes/rfsm2400_v041.zip
I have tried to decode the Russian language with Babel Fish, but I am
not sure what's different from the previous version.
Perhaps some of you who have English as first language
I'm out of the loop on the latest in CPU performance. I'm looking at a
three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC
with 512 MK Ram for $289, no monitor) another a 64 X2 Dual-Core 3800+
( 1 Gig of RAM , no monitor for $389), and one more ...the Intel®
Pentium® 4 HT
I would like to announce that I have posted fldigi, release 1.01.
This release consists of GPL source code written in C++ and uses the
Fast Light Toolkit gui support libraries. There is also a
pre-compiled binary that is known to operate on several Linux distros
including the Ubuntu derivatives.
Andrew, I dont know the speed of these cpus. But, I am using 2.2 gig cpu in
both my machines here that I built. They will run circles. I have the
whole DXLab suite running, along with my email, and run two or three screens
of IE and Firefox, etc. with no problems whatsoever. It is the memory
I am at that point that I could switch, even if I have to give up some
of the software that I prefer, since I have retired and do not
absolutely have to have certain Windows only software that I used to
require in my business.
Years ago I had a Linux dual boot and managed to correct my MBR and
I too would like to find out the answers to Ricks Questionnaire. Pleas
CC me any responses to his e-mail, thanks !
Paul Metzger
KQ6EH
---
On Nov 26, 2006, at 13:47, KV9U wrote:
I am at that point that I could switch, even if I have to give up some
of the software that I prefer, since I
Unless you are doing FlexRadio SDR I wouldn't worry about CPU speed,
especially among these choices. 512m may be a bit small, especially if
you don't plan to upgrade, so the middle choice seems like the best
deal. In any case, I would price them all at 1GB or 2GB and buy
compare at that
KV9U wrote:
I am at that point that I could switch, even if I have to give up some
of the software that I prefer, since I have retired and do not
absolutely have to have certain Windows only software that I used to
require in my business.
Years ago I had a Linux dual boot and managed to
Instead of switching Why not get a second computer and try it? You can
use a cheap IOGear video switch, or use VNC and operate it from your
Windows box (or vice versa).
An 800MHz P3 or up ought to give you a pleasant enough experience. I
used to recommend RedHat, but Fedora seems to have gone
Rick,
The Linux distros that are out have a tool for dual boot and is pretty
easy to set up.
Two Yahoo groups one being Dave's W1HKJ:
http://groups.yahoo.com/group/linuxham/
And: http://groups.yahoo.com/group/linuxhams/
If you have a IRC client like MIRC or there are some on the Linux
software
As a former electronics/computer guy, I have found it difficult to
follow the Intel marketing anymore and they really don't seem to want
you to compare their chips too directly so they have these relative
value numbering scheme. AMD seems more straightforward with an
equivalent overall speed
One more note re. Puppy. The originator of Puppy is
active on the support forum as are all of the developers.
They are an exceptionally helpful bunch of guys, much
like most Hams.
I am certain that they would love to assist with efforts
to bring Ham digi apps up to speed. They have answered
Speaking of monitors I just bought the 22 widescreen Samsung
Synchmaster 225BW. This is a moderate cost (U$400) LCD monitor with
reasonably good parameters, although not considered a high end color
corrected type. I was somewhat nervous whether I would like it and
whether I would be able
There are many versions of the AMD 64 3200+, ranging in clock speed
from 2 to 2.2 GHz. All have 128 kb of level-1 cache; some have 512 kb
of level-2 cache, and some have 1 mb.
All versions of the AMD 64 X2 Dual-core 3800+ clock are specified as 2
GHz, with 128 kb of level-1 cache and 512 kb of
I purchased two 32 inch screens to place in compressed video classrooms a
year or so back. These were small rooms with onlyi about 12-15 viewers at
any given time, and I was not real happy with the results, from the back of
the room - even just showing the in-room computer desktops. So- the next
The modes
Supports the following digital modes:
CW
DominoEX 4 DominoEX 5 DominoEX 8 DominoEX 11 DominoEX 16 DominoEX 22
Feld-Hell FSK-Hell FSK-Hell 105
MFSK-8 MFSK-16 MFSK-16 pix
PSK-31 QPSK-31 PSK-63 QPSK-63 PSK-125 QPSK-125
OLIVIA various tones and
Hello Group
I wish to have the use of two sound cards,one for digital and the other
for less important uses, ie. win sounds.
Installing my Creative Live card is perfectly normal and successful, but
the onboard card is not present any more, I have checked in Device
manager, and only the Creative
Those were not LCDs but plasmas at about 6 k two years ago, and about 2,500
a year ago. At the same time, LCDs were available only at a smaller size,
and were running about 6-12K two years ago, and have come down considerably
since then. I would NOT go with a Plasma screen at all today, even
Any interest in a digital contest held on New Year's Day? Here's
the idea
We are already hip-deep in contests, several on New Year's Day.
de Roger W6VZV
The advantage of this system ?
each subcarrier can change it's phase (and amplitude) much faster
than a carrier of limited bandwidth could do, but during symbol
integration time there is no carrier overlap, the orthogonality
remains perfect.
Yes, that is certainly the forte of OFDM,
When my windows pc's hard disk died about 1 1/2 yrs ago, I decided not
to replace it. I upgraded my linux box to suse 9.3 and haven't looked
back. Open Office does everything I need in place of microsoft office.
You'll need to become comfortable with tar, ./configure, make, and
'make
You'll need to become comfortable with tar, ./configure, make, and
'make install'.
If you go with Puppy they have implemented a Puppy Package
Manager that automates the load process from apps set up for
Puppy (the friendly folks there will create a Puppy-compatible
version of most apps on
I'm aware of the definition of orthogonality. The document originally
referenced that defined Pactor-3 made it obvious that the sidebands overlapped.
My email was to make the point that the Pactor-3 subcarriers have to be
orthogonal to make it work and therefore Pactor-3 must be OFDM --
Go with the dual core and the greater amount of RAM. That is assuming
all other things are equal.
R
Andrew O'Brien wrote:
I'm out of the loop on the latest in CPU performance. I'm looking at a
three low end computer deals. One has a AMD 64 3200 + CPU, (basic PC
with 512 MK Ram for $289,
I do operating systems level work for a living, and here's the rules I
personally use:
1) For Windows, more memory is better than more CPU. 2GB is an
excellent choice (you'll almost never be memory bound unless you're
doing truly enormous things, like serious video/audio editing). In
fact,
--- In digitalradio@yahoogroups.com, Robert Meuser [EMAIL PROTECTED] wrote:
Go with the dual core and the greater amount of RAM. That is assuming
all other things are equal.
Thanks for the feedback guys, I will go with the dual core that comes
with 1 gig of RAM that can be upgraded 4
A critical parameter with monitors in amateur radio applications is
resolution. $160 for a 20 monitor that can't do better than 1024 x
768 would be no bargain. 1280 x 1024 would be reasonable for that
price, but check its reviews for good text readability. You should
also verify that the
I foresee and recommend this variable OFDM symbol approach as the best
next step in fast HF modems for hams.
Those systems are actually very sucessful in high data rate
applications like digital sstv. Appearing 2 years ago they
have become mainstream in a very short time.
Its not the next
The 22 monitor that I use is 1680 x 1050 with 32 bit color depth. I
would not want it any higher in resolution since it would have smaller
icons and characters, however, when you use a document on such a wide
screen, you can scale the image font sizes up and down as desired with
programs such
I have tried out quite a few live distros. None really impress me from a
graphics standpoint because Linux is different than Windows and just
does not have the finesse or whatever it is that it is missing. But it
is still quite functional.
I did burn a Linux Mint distro in the past couple days
Which has made me wonder why so few digital hams send FAX images on the
phone bands.
I still would like to get a clear understanding of just how far we can
go here in the U.S. with what constitutes a FAX.
73,
Rick, KV9U
cesco12342000 wrote:
I foresee and recommend this variable OFDM symbol
Murray,
Has there been any word on whether MixW will ever support DominoEX?
All it would take is an add-on DLL. But then I am not the one writing
it, hi hi.
73,
Steve N6VL
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