Phil,
What about PSKFEC31 under the same test scenarios?
Have a look:
Path Simulation: High Latitude (Moderate)
Path Delay: 3ms, Doppler spread 10Hz
Pangram Text: Quick Brown Fox
PSK31FEC
t e tio E ttaeH loo etee- e e e ˆyaooe n o
ao t aeepvede n neete ueeeu�.tna0 o een
it=pctidr a
PSK63F is implemented in PocketDigi, source code is available.
PSK63F is in all cases better than PSK31. The only advantage of PSK31 is its
smaller bandwidth.
The other benefit of PSK31 is quick turnaround. But I agree that PSK63F shall
be exercised and will be very useful at marginal
Ah! Now that's what I was looking for.
Thanks Tony.
philw de ka1gmn
On Tue, Jan 5, 2010 at 2:13 AM, Tony d...@optonline.net wrote:
Phil,
What about PSKFEC31 under the same test scenarios?
Have a look:
Path Simulation: High Latitude (Moderate)
Path Delay: 3ms, Doppler spread 10Hz
Demonstrating a suite of digital coding methods are vulnerable to Doppler
spread does not tell the whole story. What does the signal look like on the
a spectrogram when subjected to Doppler spread? Yes, you have incomplete or
scrambled text, but then the root cause of that could be anything.
It
It seems to me that we have been down this road before comparing the different
digital modes. One thing is for certain, no matter what modes there are that
may do much better than PSK31, 99% of all operators will always use PSK31.
It is almost impossible to get more than 3% of the operators to
Glenn,
99% will always use PSK 31 ... ???- Only 3% will try something
new ?? ... !!
I assume that this survey for percentages, was completed after we
switched from using teleprinters and RTTY or to Packet, AMTOR, or even
back in the good old days when we stopped using AM and started
Last weekend was the RTTY contest. All digital mode were eligible.
All I heard was RTTY. I am only able to receive on 40M and 20M at the present
time.
The propagation is in the sewer so I was very limited on what I could hear. I
am near Seattle and the only stations I was able to copy were in
Hello John,
I like to use all the different modes that are available, and I have spent a
lot of time on the air using various modes other than PSK31. I have spent a lot
of time calling CQ with the RSID on and I come up empty handed. More than once
I was calling CQ with the RSID on using
Hello Skip,
I hope that shift happens because with the band conditions the way they have
been, we do need something other than PSK31. Most of my PSK31 contacts are not
very good print and I lose a lot of what is being sent due to QSB. And I have
noticed that the power levels are creeping up and
That is odd. I wonder which psk31 software you are using. I use WinWarbler,
and it is able to copy almost every signal seen across a wide spectrum of 2 K
or so, at any given time. Few if any of them are uncopyable. It copies traces
that I can barely see, as well as spurs up and down the
Hello Phil,
Ionospheric Doppler produces fluctuations in the phase of the BPSK
transmission. In Multipsk for BPSK, there is an indicator which name is
Quality (for 1 to 5). It can give an idea of the Doppler: if the signal is
strong and the quality is bad, it means that there is some Doppler.
--- In digitalradio@yahoogroups.com, Wes Cosand wes.cos...@... wrote:
On Mon, Jan 4, 2010 at 6:10 PM, graham787 g0...@... wrote:
HRD will communicate FLDIGI and WSPR will 'not' via same port
(not at the same time of course)
Odd problem has occured using a USB to Serial cable
The worst case and I see this once, transmission is not
possible in BPSK (or only at very high speeds as 125 bauds or more).
Why not bite the bullet and use PSK125R and pskmail client-to-client arq.
It adds an interleaver, is less susceptible to doppler effects
and adds full duplex arq at
The solution is to learn how to remove the device from the system before
unplugging it. Look for an icon in your system tray for the item.
Bob Macklin
K5MYJ
Seattle, Wa.
Real Radios Glow In The Dark
- Original Message -
From: graham787 g0...@hotmail.com
To: digitalradio@yahoogroups.com
That assumes the system was still working when the device was removed
not so this case .. the mother board failed and had to re biuld the pc
.. new mother board has 'no' comm ports .. printer or serial ..hence the
change to usbserial
So all the ghosts are still in the
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