[Lowfer] XGR PSK QSO Tonight
chastant
chastant at smart.net
Thu Nov 29 22:00:04 EST 2007
Here is my copy from tonite
de Lloyd W3NF
This first part..QPSK31 was with MIXW program
oel HroheltS,-sLY FASTER THAN PSKFEC31, WILL BE INTERESTING Th SEE HsW T
DOES WITH FADES AT GREATER DISTANCES. IF I RECALL CORRECTLY, YOU DID PRETTY
WELL WITH QPSK31 WHEN YOU DID YOUR TESTS BACK IN OCTOBER. THE BW IS NARROWER
THANoiHE FEC MODE...IT US THE REGULAR PSK31 otULSE SHAPING, I BELIEVE. HW
COPY? XGR/tn Xo >c3 K e-eeÇ tB t sñe!...............WE2XGR/3 DE WE2XGR/2 R
FB COPY JOHN. YES IT APPEARS TO BE FASTER THAN PSKFEC31. HARD TO JUDGE
EFFECTIVENESS UNDER ADVERSE CONDITIONS SINCE THERE ISN'T MUCH STATIC AND YOU
HAVEN'T SUFFERED ANY FADES SO FAR. mIGHT HAVE TO RELY ON DATA FROM FURTHER
OUT UNLESS THINGS CHANGE. YES, QPSK SEEMED TO DO BETTER THAN STRAIGHT PSK IN
THE EARLIER TESTS BUT DIFFICULT TO SAY BY HOW MUCH. HARD TO RUN TESTS
WITHOUT SWITCHING BACK AND FORTH QUICKLY AS CONDITIONS CHANGE RATHER SLOWLY.
THIS MODE DOES HAVE A RATHER STRANGE SOUND TO IT - SOUNDS LIKE IT'S
SKIPPINMG A BEAT FAIRLY OFTEN. HW? BKN"Icabte eieeE >ooebnAee oie soauzto
;abwueK iu \s/3 olr aD C eHY AGo s¿i HAD
te hUPLE OF eMALL DES, BUT NO GARBLobevI§OT =E THAT THE TRANSMIT AUDIO
LEVEL IS SIGNIFICANTLY LOWER IN THE QPSK MODE. DOUBLE CHECKED IT WITH THE
SttOPE TO BE SUR o BEFORE WE STARTED. I HAVE A PEAK-READING LED METER IN MY
SSB EXCITER, AND IT CORRESPO Heo QUITE CLOSELY WITH THE SCOPE WHICH I HAVE
WITCHING THE eeUTPUT Eu h)LOPE OF THE HAFLER. MAKES A NICE FEATURE TOc
SETTING AUDIO LEVELum ItoSIue
A RACK CH -SIx oAT WEe itesAT
OwT F toeK PImtiE t" DEO G eARaaZ TAS THAi LED DISPLAY, Sea IT WAS EASY TO
ADAPT. NEVER THROW ANYTHING AWAY.
eiW -- THE MISSED LL SIGN AT THE START OF THIS TRANSMISSION WAS A GLITCH
HERE, NOT A PROPAGATION PROBLEM. UR RIGHT -- THE QPSK MODE DOES SOUND A
LITTLE DIFFERENT. SO IT'S ABOUT 0210, WHY DON'T YOU COME BACK IN PSKFEC 31
MODE? WE2XGR/2 DE WE2XGR/3 G
And this part..PSK31FEC was with Multipsk program
TTR 629M 8ØOT TEO TM OT.....WE2XGR/3 DERME2XGRJ2 /R. FB JOHN THERE WERE
ABOUT A HALF DOZEN MISSED CHARACTERS ON YOUR LAST TRANSMISSION DUE TO
FADING. THE STATIC, ALTHOUGH NOT VERY STRONG, DOESN'T SEEM TO BOTHER THINGS.
WILL BE INTERESTING TO SEE THE COMPARISON FROM LISTENERS FURTHER OUT. YES, I
NOTICED THE SAME APPARENT DIFFERENCE IN SCOPE PRESENTATIONS BETWEWEN QPSK
AND PSK. DIDN'T MAKE A MEASUREMENT ON PEAK POWER TO SEE IF THEY WERE THE
SAME. JUST LEFT AUDIO LEVELS THE SAME FOR BOTH FIGURING THAT THE PEAK POWER
WAS ABOUT THE SAME. ANYWAY, HW COPY THIS MODE? BKI EWACE......WE2XGR/2 DE
WE2XGR/3 IN PSKFEC31 MODE. RR GOOD COPY AGAIN. DEFINITELY SLOWER. NO HITS AT
ALL IN THE TEXT. I DO REMAIN THE KING OF FADING. MULTIPSK IS PROBABLY BUILT
WITH DIFFERENT MODULES FROM DIFFERENT SOURCES, AND I SUPPOSE THEY ALL TREAT
LEVELS DIFFERENTLY. THIS FEC MODE IS DEFINITELY WELL BEHAVED FROM AN
OPERATING POINT OF VIEW -- GOOD TYPING SPEED, ETC. HOW'S THE FADING THIS
TIME? XGR/2 DE XGR/3 KS
EBX9 L...................WE2XGR/3 DE WE2XGR/2 R R HAD A GOOD LOOK AT YOU
THROUGH SEVERAL FADES THAT TIME AND THIS MODE APPEARS TO BE MORE ROBUST THAN
QPSK SINCE I'M SURE I WOULD HAVE LOST YOU IN QPSK. YOU EARNED YOU TITLE 'THE
FADING KING' ON THAT LAST TRANSMISSION. WILL BE NICE TO GET REPORTS FROM
FURTHER OUT. BTW...HELLO TO ALL LISTENERS/WATCHERS1 TEMP HERE 37F AND CLEAR.
HAD SOME RAIN DURING THE NOON HOURRODAY BUT CLEARED UP IN THE AFTERNOON.
WONDER WHAT MODES WE SHOULD RUN FOR THE NEXT SESSION
HB5 COPY NDAE? BE69ROREIE.....WE2XGR/2 DE WE2XGR/3 RR AGAIN, SOLID COPY.
THE FADES HAVEN'T BEEN AS DEEP AS THE OTHER NIGHT, THOUGH. GUESS I NEED TO
LOOK INTO A 5/8 WAVE VERTICAL, HUH? NOT SURE WHAT MODE TO TRY NEXT. NEED TO
DO SOME RESEARCH, AND WILL GET BACK TO YOU. I DON'T THINK THE HELL MODE THAT
BOB SUGGESTED IS GOING TO PROVIDE GOOD RESULTS WITH FADING, BASED ON WHAT WE
SAW AT 137 KHZ. I WILL BE AROUND ON FRIDAY NIGHT, AND WE CAN DECIDE WHAT TO
DO BY EMAIL. DON'T THINK IT'S NECESSARY TO REHASH THE VERY SLOW LF STU
EPAOUG7IT WOU ESBE FI$SF SOFTDEPA TH
- LISTSTERI COUPD TRY WOLF COPY. ANYWAY, 73 FOR NOW, AND WILL BE IN TCUCH.
GN TO A)RP WE2XE :I WE2XFR/TT
----- Original Message -----
From: "John Andrews" <w1tag at w1tag.com>
To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands"
<lowfer at mailman.qth.net>
Sent: Thursday, November 29, 2007 1:50 PM
Subject: [Lowfer] XGR PSK QSO Tonight
> Jay (WE2XGR/2) and I will continue our QSO series tonight at 0200 UTC on
> 508.5 kHz. The first 10 minutes or so will be QPSK31, and we will then
> switch to the previously successful PSKFEC31. The QPSK stuff is readable
> with a number of programs, and the PSKFEC31 mode is found in MultiPSK
> only. As always, reports will be welcome.
>
> John Andrews, W1TAG / WE2XGR/3
>
> Feel free to post this elsewhere. The set of elsewheres is nearly
> unbounded these days.
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