All,
I was able to take some time to test MFTTY with the HF path simulator this
evening. I added a few commonly use modes for comparison. As expected, the
slower / narrow MFTTY modes seemed to have a definite weak signal advantage
over the faster ones.
The minimum SNR test showed a wide
Thanks for the tests, Tony. The numbers confirm what NC5O and I found
yesterday with our on-the-air comparisons between MFTTY, PSK31, PSK63,
PSK125, and MFSK16 over a period of four hours and changing band conditions.
We could communicate on PSK31 long after MFTTY had quit decoding, and solid
Selective Fading
SNR -8db
MFSK1690%
Olivia 500/15 100%
PSK31 65%
RTTY 45 25%
Although MFSK16 produced 10% errors when Olivia produced no errors, Olivia
16-500 (20 wpm) takes twice as long to send the same information as MFSK16
(42
Hi Misko.
I strongly believe before going to actually implement something one
shall explore existing systems first and if it is possible, try to
simulate a new system using the existing one. I propose that you and
your friends try to set up a flexnet system using fixed links at
single frequency.
--- In digitalradio@yahoogroups.com, clarkmvimi clarkmv...@... wrote:
Good day. I am new to the group and digital modes. My name is Steve
Clark V73CS and I am located in the Marshall Islands. I am wanting to
setup a digital station here. I have someone sending me an AEA 232
MBX for my
The latest fldigi 3.10 is now available on the w1hkj.com web site.
Skip,
Glad to hear that the path simulations coincide with your on-air tests. I agree
with your take on Olivia 500/16 and MFSK16. There are times when I'd rather
sacrifice some throughput and go twice as fast.
The throughput gap between the two does increase under severe ionospheric
G'Day All,
I am trying to get more to grips with all the digital modes to operate.
I currently run HRD w DM780 and MFTTY software on my computer (Love HRD)
I have used DM780 in the past but it was just plug-in and see if it ran, which
it did and was able to make some contacts.
I have since
Kevin,
What I was interested in, is, should I have moved the radio freq. to pull
the station onto the 1.5Khz
No need to move the VFO unless you decide to search outside the 2.5 KHz
window of your radios pass band. Most of the PSK31 activity, for example,
falls within that window.
Should I
Note: for the file ALE_and_ALE400_easy_with_Multipsk.doc:
http://f6cte.free.fr/ALE_and_ALE400_easy_with_Multipsk.doc
http://f6cte.free.fr/ALE_and_ALE400_easy_with_Multipsk.doc
add some store and forward ability.
Do you mean: receive a text or a file and, on detection of a specific call
sign,
--- In digitalradio@yahoogroups.com, Gmail - Kevin, Natalia, Stacey
Rochelle spar...@... wrote:
DM780 through the sound card to Kenwood TS-480S/AT, in the data socket.
When I start DM780 and look at the screen, waterfall I see the data
mode, in this case PSK31 on 14.081.5, but the radio is
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