Amateur ARQ modes are 'session' oriented. That means one and only one
connection at a time can be made between stations. Each station
checking in would have to 'make' a connection with the net control
station and then send callsign, etc. A 'disconnect' would then have
to be done to allow the
Jason,
There was an STA (Special Temporary Authorization) that ARRL got from
the FCC, many years ago to test the concept of unattended HF packet
stations to form a network. There are a few hams who continue to attempt
to operate this system on at least 20, 30, and 40 meters.
Needless to say,
I'm sorry, I had a typo.
ARQ modes are NOT conducive to net operations. Most of them are session
oriented since the terminating end has to provide ARQ messages back to the
originating station that packets are received correctly. If you have 7 people
on the net and two miss different data
On Saturday 25 February 2006 09:19, KV9U wrote:
Jason,
Needless to say, 300 baud does not work well on HF. At least not with
conventional two tone packet. For their own reasons, they chose not to
move toward a far better ARQ mode. I am supportive of the concept of a
sort of mesh network of
What makes RTTY so inappropriate for passing traffic? (I have no
experience with this mode so far. In fact, I'm currently brand new to
digital modes. So far, I've only used PSK-31.)
In addition to PSK-31, what other modes should the net use? Just as
my Missing You Like Candy Net operates
Title: RE: [digitalradio] Re: Starting a digital 30m traffic/ragchew net
IMHO...
RTTY has no error correction capability and is 45.5 baud.
AMTOR is basically RTTY with an ARQ mode.
PSK-31 is 31 baud and more robust than RTTY. PSK-31 with ARQ is more robust than PSK-31, AMTOR or RTTY
At 11:15 AM 2/24/06, you wrote in part:
AMTOR is basically RTTY with an ARQ mode.
But Mode A (ARQ) gave it Error Corrections.
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
At 09:09 AM 2/24/06, you wrote:
What makes RTTY so inappropriate for passing traffic? (I have no
experience with this mode so far. In fact, I'm currently brand new to
digital modes. So far, I've only used PSK-31.)
Not a thing !
While a member of Navy MARS it was no uncommon to have
a traffic
snip
I'd also like the digital 30m net to operate on different digital
modes on different days of the week.
snip
Jason Hsu, AA0II
Cedar Rapids, IA
Jason, if you go to www.ips.gov.au , HF Systems, and look at the HAP
charts, you will find that 30m has excellent propagation in the
daytime,
Title: RE: [digitalradio] Re: Starting a digital 30m traffic/ragchew net
On 30M with a NVIS antenna you can generally work as close in as 200-300 miles and its not uncommon to work stations as close as 100 miles or somewhat less.
I find that NVIS and low angle of radiation antennas
RTTY can have tremendous errors in the data. Also, all things being
equal, you typically run much higher power to operate RTTY compared to
the newer modes such as PSK31.
Very few current sound card modes are ARQ. My experience says that only
ARQ modes should be used for serious traffic
--- In digitalradio@yahoogroups.com, KV9U [EMAIL PROTECTED] wrote:
Very few current sound card modes are ARQ. My experience says that
only ARQ modes should be used for serious traffic handling.
Why should only ARQ modes be used for traffic handling? CW, SSB, and
FM are non-ARQ modes, and
There was a study done a couple of years ago I believe by the ARRL that showed
accuracy of relaying by SSB was not nearly what it should be, CW (if I
remember correctly) was better but still not good. I don't remember FM being
nvolved in the test.
If I can find the study somewhere I'll post a
Obviously, I am referring to digital modes as we do use voice and cw
modes with some success, although quite slow compared to the potential
of what digital modes could do.
There is at least one official ARRL Skipnet operation on 10.147, but it
is fair to say that few use the band for digital
There is at least one official ARRL Skipnet operation on 10.147, but
it is fair to say that few use the band for digital links other than
Winlink 2000.
What is Skipnet?
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector :
The biggest problem you'll find is that ARQ session oriented modes
are conducive to net operations.
Why aren't ARQ modes conducive to net operations?
FEC modes, on the other hand, are.
Why are FEC modes good for passing traffic?
Jason Hsu, AA0II
Need a Digital mode QSO? Connect to
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