Walt,
I think there is no doubt that this is true. The question I have
been struggling with is how much is enough/too much. I guess what I
am looking for is a curve showing bandwidth vs. throughput for
parallel tone modems, or maybe more precisely where is the point of
diminishing returns?
Mark Miller wrote:
What my question
boils down to is generally, what is the accepted maximum bandwidth of
any signal in the Amateur HF bands, given the finite spectrum and
many interests?
Hi Mark,
I believe there is a need for both time efficient and bandwidth
efficient methods on the
Mark Miller wrote:
What my question
boils down to is generally, what is the accepted maximum bandwidth of
any signal in the Amateur HF bands, given the finite spectrum and
many interests?
There's the billion [insert local currency here] question. Or
actually two questions: what's the
Mark Miller wrote:
ERRATUM Released: November 27, 2006 By the Chief, Mobility Division,
Wireless Telecommunications Bureau: 1
I assume that this means 1Khz MT63 and Olivia are now permitted after
12/15/06.
I suppose it also means Pactor 3 is still permitted?
de Roger W6VZV
--- In digitalradio@yahoogroups.com, Roger J. Buffington
[EMAIL PROTECTED] wrote:
Mark Miller wrote:
ERRATUM Released: November 27, 2006 By the Chief, Mobility
Division,
Wireless Telecommunications Bureau: 1
I assume that this means 1Khz MT63 and Olivia are now permitted
after
Roger,
From my perspective (which is probably a bit more liberal than many)
all these things are important and they all certainly directly impact
digital topics.
73,
Rick, KV9U
Roger J. Buffington wrote:
No matter what group I join, this Windows v. Linux topic comes up. If
we are not
The maximum accepted bandwidth for most modes is the width of an SSB
transmitter since you can not go wider than that and communicate with
the typical rigs of the day.
We already have the basic modes to work high speeds with good conditions
and slower speeds under difficult conditions. What we
Mark,
I did not see any response to your bandplan proposal.
Some thoughts that I have:
- I would have a digital area on each band (including WARC bands) for
suggested mixed mode activity based upon FCC mode allowance.
- Because we have gravitated toward the bottom of the bands with CW and
Mark,
I did not see any response to your bandplan proposal.
Some thoughts that I have:
- I would have a digital area on each band (including WARC bands) for
suggested mixed mode activity based upon FCC mode allowance.
- Because we have gravitated toward the bottom of the bands with CW and
Put an 8 ohm resistor in place of the speaker. Then across the 8 ohm speaker
place a 600 ohm resistor in searies with a small 2 speaker. You can vary the
series resistor from about 300-1200 ohms to adjust the volumn. The series
resistor won't bother the 8 ohm speaker output too much.
Way back when, Debian tried to solve this by being the Ham Friendly distro and
most ham programmers used Debian.
Today programmers like one distro or another and don't generally tell you what
distro they used. If they do, then you might want to use that distro. The
problem is, as you have
Actually one of the reasons I use Linux is that there are applications that I
like but want to add or change certain little nuances and having the source
code readily available and being able to change it and re-compile the
applications has bee a great deal of fun.
Editing the source code is
Hi all;
I have an 800 MHz AMD computer with 512 MB RAM and primary 40 GB HDD and
secondary 80 GB HDD divided into three virtual discs of 40, 20, and 20 GB. I am
running Windows XP.
I would like to install LINUX on the third 20 GB virtual disk. Questions:
1.. Is it possible?
2.. If yes,
Omar:
As-Sal#257;mu `Alaykum
When you install Linux on the third drive all things will be handled
properly if the Linux installs grub. grub is the tool that allows
multiple operating systems to be selected. So when you insert the
installation disk into the CD ROM drive, the following things
Thanks, Walt! I'm sure that would work, but it would leave me with a
non-adjustable volume, and I do want to be able to adjust it up when it's
not annoying to the XYL. I'm going to try a pair of computer speakers
tonight when I get home. I'm hoping the volume control on them will make
up for the
jhaynesatalumni wrote:
I just tried running multipsk under wine. After not finding the
volume control it put up a box that says something like it is trying
to access through 00 and then puts a mess on the screen.
What incantation are you using to get it to work?
No, did not
Roger J. Buffington wrote:
No matter what group I join, this Windows v. Linux topic comes up.
If we are not supposed to keep talking about the new FCC digital regs
(something of vital interest to most of us digital ops) then we
should be able to dispense with this Linux topic, which has
Hello Jose,
I think the Multipsk version 4.1.1 can't work under Linux with ou without flute
music as i used in this version a DLL to measure the CPU load. But as this DLL
does not work in all XP versions and never in XP pro (why?), I've put this
feature only as an option in the 4.1.2 version.
Dave wrote:
I'm feeding audio from my IC-746 (non-Pro) to the PC from the ACC-1
jack so I can have constant audio level. I feed audio from the
external speaker jack to an external speaker (novel concept!). The
problem I'm encountering is that I share the shack with the XYL, who
is only
Hi all,
Go to http://rfsm2400.narod.ru/ and download the latest
MIL-STD 188-110 Modem.
(Or use my link, it's faster)
http://home.broadpark.no/~saanes/rfsm2400_v42.zip
73 de LA5VNA Steinar
That was my original thought, although I couldn't remember the term
L-pad. Using computer speakers was suggested, and since I had a pair
sitting around, I gave them a try this afternoon. Solved the problem
completely! Now I have _much_ better control of the volume, and the
audio even
Pactor-3 is as legal as it was before the Omnibus RO, but unless you are
sending a fax it is restricted to the new RTTY/Data segments.
73,
John
KD6OZH
- Original Message -
From: Roger J. Buffington
To: digitalradio@yahoogroups.com
Sent: Wednesday, November 29, 2006 02:03 UTC
Except on 80m, when used to contact an automatic station in a mode
wider than 500 Hz.
Jim
WA0LYK
--- In digitalradio@yahoogroups.com, John B. Stephensen [EMAIL PROTECTED]
wrote:
Pactor-3 is as legal as it was before the Omnibus RO, but unless
you are sending a fax it is restricted to the new
If radiated power is not limited, data rate is directly proportional to
bandwidth, but the maximum data rate per kHz depends on the amount of time
(multipath) spreading and amount of frequency (Doppler) spreading. NVIS has
a multipath spread of 6-12 ms and there needs to be a gap between symbols
Near the equator,
there is little frequency spread ( 4 Hz), but it is larger
in near-polar paths and can be very large (up to 40 Hz)
under disturbed conditions.
A question: where does the frequency spread come from ?
Is this a doppler effect of a moving ionosphere, or are
there other
Dopper shift increases with ionospheric disturbance and the solar geophysical
reports always show that the effect is more pronounced in northern latitudes. I
don't know a lot about the physics of the ionosphere but I assume that it's for
the same reason the aurora always occurs near the poles.
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